remove bios roms
This commit is contained in:
parent
02a7627734
commit
e2d244a919
23
Makefile
23
Makefile
@ -1,13 +1,11 @@
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PROGRAMS = hello.com sys.com
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KERNEL = @rdos.com
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DISTFILES = $(KERNEL) $(PROGRAMS)
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ROMS =
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VERSION = $(shell git log -1 --format=%cd --date=format:%Y%m%d)
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PRODUCT = rdos
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QEMU = qemu-system-i386
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QEMU_ARGS = $(addprefix --option-rom ,$(ROMS))
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QEMU_ARGS += $(shell test -w /dev/kvm && echo --enable-kvm)
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METRIC = stat -c '%8s %n'
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@ -15,17 +13,11 @@ METRIC = stat -c '%8s %n'
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NASM = nasm
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NASM_ARGS = -s -Isrc --before "cpu 8086" -DPRODUCT=$(PRODUCT) -DVERSION=$(VERSION)
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ifdef DEBUG
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ROMS += dprintf.rom
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NASM_ARGS += -l $(basename $@).lst -DDEBUG=1
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endif
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ifndef DISPLAY
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QEMU_ARGS += --display curses
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endif
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SYS = host/sys.elf
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FIXROM = host/fix-rom.elf
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.PHONY: default clean qemu-floppy5 qemu-floppy3
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.PRECIOUS: %.com
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@ -57,10 +49,6 @@ fat4.bs: boot/fat.asm
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fat6.bs: boot/fat.asm
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$(NASM) $(NASM_ARGS) -DFAT16 -DCHS -DLARGE -o $@ $<
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# BIOS option roms
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%.rom: rom/%.asm $(FIXROM)
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$(NASM) $(NASM_ARGS) -o $@ $< && $(FIXROM) $@
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fd%.img: $(DISTFILES) $(SYS)
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mformat -C -i $@ -f $* -v "$(PRODUCT) $(VERSION)" ::
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mcopy -i $@ $(DISTFILES) ::
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@ -72,21 +60,18 @@ hdd.img: mbr.bs $(KERNEL) fd1440.img
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dd if=fd1440.img bs=512 seek=63 of=$@
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clean:
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rm -f *.com *.bs *.0 *.lst *.img *.bin *.rom
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rm -f *.com *.bs *.0 *.lst *.img *.bin
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rm -f host/*.elf
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qemu-floppy3: fd1440.img $(ROMS)
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qemu-floppy3: fd1440.img
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$(QEMU) $(QEMU_ARGS) -boot a -fda fd1440.img
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qemu-floppy5: fd360.img $(ROMS)
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qemu-floppy5: fd360.img
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$(QEMU) $(QEMU_ARGS) -boot a -fda fd360.img
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qemu-hdd: hdd.img $(ROMS)
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qemu-hdd: hdd.img
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$(QEMU) $(QEMU_ARGS) -boot c -hda hdd.img
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qemu-uartctrl: uartctrl.rom chartab.bs
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$(QEMU) $(QEMU_ARGS) -option-rom uartctrl.rom -serial stdio -hda chartab.bs
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dosbox-%: %.com fd1440.img
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dosbox -c "mount P $(CURDIR)" -c P: -c "IMGMOUNT A: FD1440.IMG -t floppy" -c "$< $(ARGS)" -c pause -c exit
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159
rom/dprintf.asm
159
rom/dprintf.asm
@ -1,159 +0,0 @@
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cpu 8086
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org 0x0000
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db 0x55, 0xAA
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db 0x00
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jmp init
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nop
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times (0x18 - ($-$$)) db 0
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dw 0
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dw pnp
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pnp: db "$PnP"
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db 1 ; version 1
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db 2 ; 2 * 16 length
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dw 0 ; offset of next header
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db 0
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db 0 ; checksum (filled by fix-rom)
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dd 0 ; device identifier
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dw 0 ; manufacturer string
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dw name ; product name string
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db 0,0,0 ; device type string
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db 0x20 ; device indicator, bit for "read cacheable" set
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dw 0 ; boot connection vector
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dw 0 ; boot disconnect vector
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dw 0 ; bootstrap entry point
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dw 0 ; reserved
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dw 0
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name: db "dprintf"
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init: push ds
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push ax
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xor ax, ax
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mov ds, ax
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mov word [1*4], int3entry
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mov word [1*4+2], cs
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mov word [3*4], int3entry
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mov word [3*4+2], cs
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pop ax
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pop ds
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retf
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crlf: xor bx, bx
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mov ax, 0x0e0a
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int 0x10
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mov al, 0x0d
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int 0x10
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ret
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printr: mov al, cl
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int 0x10
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mov al, ch
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int 0x10
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mov al, '='
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int 0x10
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call printd
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mov al, ' '
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int 0x10
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ret
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printd: mov cl, 4
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; this double-call is essentially a 4 times repeating loop
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call .c1
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.c1: call .c2
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.c2: ; grab highest nibble from dx
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mov al, dh
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; remove highest nibble from dx
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shl dx, cl
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; shift away second-highest nibble that we accidentally copied
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shr al, cl
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; map 0-9 to ascii codes for '0' to '9'
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add al, 0x30
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; if result is larger than '9', ...
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cmp al, 0x3a
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jl .noadj
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; ... add 7 so we continue at 'A'
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add al, 7
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.noadj: int 0x10
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ret
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int3entry:
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push bx
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push dx
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push cx
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push ax
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push bp
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mov bp, sp
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call crlf
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xor bx, bx
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mov ah, 0x0e
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mov cx, 'AX'
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mov dx, [bp+2]
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call printr
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mov cx, 'CX'
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mov dx, [bp+4]
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call printr
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mov cx, 'DX'
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mov dx, [bp+6]
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call printr
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mov cx, 'BX'
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mov dx, [bp+8]
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call printr
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mov cx, 'BP'
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mov dx, [bp]
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call printr
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mov cx, 'SP'
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lea dx, [bp+16]
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call printr
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mov cx, 'SI'
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mov dx, si
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call printr
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mov cx, 'DI'
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mov dx, di
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call printr
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call crlf
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mov cx, 'ES'
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mov dx, es
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call printr
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mov cx, 'CS'
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mov dx, [bp+12]
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call printr
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mov cx, 'SS'
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mov dx, ss
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call printr
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mov cx, 'DS'
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mov dx, ds
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call printr
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mov cx, 'IP'
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mov dx, [bp+10]
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call printr
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call crlf
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pop bp
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pop ax
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pop cx
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pop dx
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pop bx
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iret
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align 512
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394
rom/uartctrl.asm
394
rom/uartctrl.asm
@ -1,394 +0,0 @@
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cpu 8086
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org 0x0000
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; configuration for the uart chip for i/o
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%define uart 0x3F8
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%define irq 4
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%define clock 115200
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%define baud 9600
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%ifndef CODEPAGE
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%define CODEPAGE 437
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%endif
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data equ (uart + 0) ; data register
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ier equ (uart + 1)
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fcr equ (uart + 2)
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isr equ (uart + 2)
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lcr equ (uart + 3)
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mcr equ (uart + 4)
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lsr equ (uart + 5) ; line status register
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msr equ (uart + 6)
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absolute 0xE0 ; data in bios data area
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pstate resw 1 ; parser resume offset
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parg resb 1 ; accumulator for numerical CSI arguments
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curcs resb 1 ; current charset we put remote term in
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section .text
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db 0x55, 0xAA
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db 0x00
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jmp init
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%defstr uart_s uart
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%defstr baud_s baud
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banner db "nero uartctrl: port ", uart_s, " irq ", irq + 0x30," baud ", baud_s, 0x0A, 0x0D, 0
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init push ax
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push dx
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push bx
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push si
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push ds
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; set dlab
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mov dx, lcr
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in al, dx
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or al, 0x80
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out dx, al
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; set divisor
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mov cx, (clock / baud)
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; low byte
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mov dx, (uart + 0)
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mov al, cl
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out dx, al
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; high byte
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mov dx, (uart + 1)
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mov al, ch
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out dx, al
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; disable dlab
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mov dx, lcr
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in al, dx
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and al, 0x7F
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out dx, al
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; disable fifo
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mov dx, fcr
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mov al, 0
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out dx, al
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; enable RX interrupt
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mov dx, ier
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mov al, 1
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out dx, al
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; set line modes (8 bits, no parity, 1 stopbit)
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mov dx, lcr
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mov al, 3
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out dx, al
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; set modem control lines (unused)
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mov dx, mcr
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mov al, 8
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out dx, al
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; DS = interrupt table
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xor ax, ax
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mov ds, ax
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; hook video services
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; keep original ptr in intvec 47h for chaining
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mov ax, int10
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mov bx, cs
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xchg word [4*0x10], ax
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xchg word [4*0x10+2], bx
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mov word [4*0x47], ax
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mov word [4*0x47+2], bx
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; reset parser state
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mov word [0x400+pstate], parse.start
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; hook uart irq
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mov word [4*(0x08+irq)], intu
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mov word [4*(0x08+irq)+2], cs
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; enable IRQ in PIC
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mov dx, 0x21
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in al, dx
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and al, ~(1 << irq)
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out dx, al
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call greet
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pop ds
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pop si
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pop bx
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pop dx
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pop ax
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retf
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greet mov si, banner
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xor bx, bx
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.loop mov al, [cs:si]
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test al, al
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jz .exit
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mov ah, 0x0e
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int 0x10
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inc si
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jmp .loop
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.exit ret
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putc mov ah, al
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; check if transmit buffer empty
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.l01 mov dx, lsr
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in al, dx
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test al, 0x20
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jz .l01
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mov al, ah
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; send char to uart
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mov dx, data
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out dx, al
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ret
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; set charset
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; IN AL '0', 'A' or 'B'
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setcs test al, al
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jz .fret
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push ds
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; set DS
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mov dx, 0x40
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mov ds, dx
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cmp al, [curcs]
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je .ret
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mov [curcs], al
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mov al, 0x1B
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call putc
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mov al, '('
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call putc
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mov al, [curcs]
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call putc
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.ret pop ds
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.fret ret
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pdx: ; this double-call is essentially a 4 times repeating loop
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call .l1
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.l1: call .l2
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.l2: ; set up cl for bit shifts
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mov cl, 4
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; grab highest nibble from dx
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mov al, dh
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; remove highest nibble from dx
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shl dx, cl
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; shift away second-highest nibble that we accidentally copied
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shr al, cl
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; map 0-9 to ascii codes for '0' to '9'
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add al, 0x30
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; if result is larger than '9', ...
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cmp al, 0x3a
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jl pputc
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; ... add 7 so we continue at 'A'
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add al, 7
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pputc mov ah, 0x0e
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xor bx, bx
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int 0x10
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ret
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; video services
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int10 cmp ah, 0x0e
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jne .chain
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push bx
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push dx
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push ax
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; activate character set for current char
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mov bx, csmap
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cs xlatb
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call setcs
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pop ax
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push ax
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; look up what we need to write out
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mov bx, ecmap
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cs xlatb
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call putc
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pop ax
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pop dx
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pop bx
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.chain sub sp, 4
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push bp
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mov bp, sp
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; stack: BP IP:CS IP:CS FL
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push ax
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push ds
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xor ax, ax
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mov ds, ax
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; copy offset
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mov ax, [4*0x47]
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mov [bp+2], ax
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; copy segment
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mov ax, [4*0x47+2]
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mov [bp+4], ax
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pop ds
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pop ax
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pop bp
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retf
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; uart controller irq
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intu push ax
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push dx
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; check if we controller has data ready
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mov dx, isr
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in al, dx
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and al, 0xF
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cmp al, 4
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jne ugetc.ret
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; set DS to bios data area
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push bx
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push ds
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mov ax, 0x40
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mov ds, ax
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; receive data
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mov dx, data
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in al, dx
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jmp near [pstate] ; load parser state
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ugetc pop word [pstate] ; save parser state
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pop ds
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pop bx
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; send non-specific EOI signal
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.ret mov al, 0x20
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out 0x20, al
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pop dx
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pop ax
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iret
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; parse loop
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; this is called from inside the uart interrupt
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; only call ugetc when nothing on stack, so no nested funcs
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parse call ugetc
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.start cmp al, 0x1B
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je .esc
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cmp al, 0x7F
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je .bs
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.ascii mov dl, al
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mov bx, kmap
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cs xlatb
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mov dh, al
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; insert key code into buffer in bios data area
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.insert mov bx, [0x1C] ; get next empty slot
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mov [bx], dx ; store key code
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add bx, 2
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cmp bx, 0x3E ; are we beyond last pos?
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jc .nowrap
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mov bx, 0x1E ; first position
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.nowrap cmp bx, [0x1A] ; next to-read slot
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je parse
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mov [0x1C], bx ; commit if not full
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jmp parse
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.bs mov dx, 0x0E08
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jmp .insert
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.esc call ugetc
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cmp al, 0x5B
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je .csi
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cmp al, 'O'
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je .vt_o
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jmp parse
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.csi mov byte [parg], 0 ; reset argument
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.csicon call ugetc ; number parsing
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cmp al, 0x30
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jc parse
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cmp al, 0x3A
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jnc .nonum
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sub al, 0x30
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mov dl, al
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mov al, 0xA
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mul byte [parg]
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add al, dl
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mov [parg], al
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jmp .csicon
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.nonum cmp al, '~' ; \e[...$c handling
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jne .letter
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mov al, [parg] ; \e[$n~ lookup $n
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mov bx, fkeysn
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jmp .lookup
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.vt_o call ugetc ; VT100 \eO... sequences
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.letter sub al, 0x40 ; look up special key by letter
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mov bx, fkeysc
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.lookup cmp al, 0x40 ; special key lookup, bx assumed
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jnc parse
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cs xlatb
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cmp al, 0
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je parse
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mov dh, al
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mov dl, 0
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jmp .insert
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align 128
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; ascii -> XT scancode map
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%if CODEPAGE = 437
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; US Keyboard layout
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kmap db 0x00,0x1E,0x30,0x2E, 0x20,0x12,0x21,0x22, 0x23,0x0F,0x24,0x25, 0x26,0x1C,0x31,0x18
|
||||
db 0x19,0x10,0x13,0x1F, 0x14,0x16,0x2F,0x11, 0x2D,0x15,0x2C,0x01, 0x2B,0x1B,0x07,0x0C
|
||||
|
||||
db 0x39,0x02,0x03,0x04, 0x05,0x06,0x08,0x28, 0x0A,0x0B,0x09,0x0D, 0x33,0x0C,0x34,0x35
|
||||
db 0x0B,0x02,0x03,0x04, 0x05,0x06,0x07,0x08, 0x09,0x0A,0x27,0x27, 0x33,0x0D,0x34,0x35
|
||||
|
||||
db 0x03,0x1E,0x30,0x2E, 0x20,0x12,0x21,0x22, 0x23,0x17,0x24,0x25, 0x26,0x32,0x31,0x18
|
||||
db 0x19,0x10,0x13,0x1F, 0x14,0x16,0x2F,0x11, 0x2D,0x15,0x2C,0x1A, 0x2B,0x1B,0x07,0x0C
|
||||
|
||||
db 0x29,0x1E,0x30,0x2E, 0x20,0x12,0x21,0x22, 0x23,0x17,0x24,0x25, 0x26,0x32,0x31,0x18
|
||||
db 0x19,0x10,0x13,0x1F, 0x14,0x16,0x2F,0x11, 0x2D,0x15,0x2C,0x1A, 0x2B,0x1B,0x29,0x70
|
||||
|
||||
; character map
|
||||
; resolves codepage character to character in charset (see next table)
|
||||
ecmap db 0x00,0x01,0x02,0x03, 0x60,0x05,0x06,0x07, 0x08,0x09,0x0A,0x0B, 0x0C,0x0D,0x0E,0x0F
|
||||
db 0x10,0x11,0x12,0x13, 0x14,0x15,0x16,0x17, 0x18,0x19,0x1A,0x1B, 0x1C,0x1D,0x1E,0x1F
|
||||
db 0x20,0x21,0x22,0x23, 0x24,0x25,0x26,0x27, 0x28,0x29,0x2A,0x2B, 0x2C,0x2D,0x2E,0x2F
|
||||
db 0x30,0x31,0x32,0x33, 0x34,0x35,0x36,0x37, 0x38,0x39,0x3A,0x3B, 0x3C,0x3D,0x3E,0x3F
|
||||
|
||||
db 0x40,0x41,0x42,0x43, 0x44,0x45,0x46,0x47, 0x48,0x49,0x4A,0x4B, 0x4C,0x4D,0x4E,0x4F
|
||||
db 0x50,0x51,0x52,0x53, 0x54,0x55,0x56,0x57, 0x58,0x59,0x5A,0x5B, 0x5C,0x5D,0x5E,0x5F
|
||||
db 0x60,0x61,0x62,0x63, 0x64,0x65,0x66,0x67, 0x68,0x69,0x6A,0x6B, 0x6C,0x6D,0x6E,0x6F
|
||||
db 0x70,0x71,0x72,0x73, 0x74,0x75,0x76,0x77, 0x78,0x79,0x7A,0x7B, 0x7C,0x7D,0x7E,0x7F
|
||||
|
||||
db 0x47,0x7c,0x69,0x62, 0x64,0x60,0x65,0x67, 0x6A,0x6B,0x68,0x6f, 0x6e,0x6c,0x44,0x45
|
||||
db 0x49,0x66,0x46,0x74, 0x76,0x72,0x7b,0x79, 0x7d,0x56,0x5C,0x22, 0x23,0x25,'P' ,'f'
|
||||
db 0x61,0x6D,0x73,0x7a, 0x71,0x51,0x2A,0x3A, 0x3F,0x2C,0x2C,0x3d, 0x3c,0x21,0x2b,0x3b
|
||||
db 0x61,0x61,0x61,0x78, 0x75,0x75,0x75,0x6B, 0x6B,0x75,0x78,0x6B, 0x6a,0x6a,0x6a,0x6b
|
||||
|
||||
db 0x6D,0x76,0x77,0x74, 0x71,0x6E,0x74,0x74, 0x6D,0x6C,0x76,0x77, 0x74,0x71,0x6E,0x76
|
||||
db 0x76,0x77,0x77,0x6D, 0x6D,0x6C,0x6C,0x6E, 0x6E,0x6A,0x6C,0x61, 0x61,0x61,0x61,0x61
|
||||
db 0x61,0x62,0x47,0x70, 0x53,0x73,0x35,0x74, 0x46,0x6A,0x57,0x64, 0x42,0x66,0x65,0x5C
|
||||
db 0x4F,0x67,0x7A,0x79, 0x24,0x25,0x43,0x49, 0x66,0x7E,0x7E,0x21, 0x32,0x32,0x61,0x5F
|
||||
|
||||
; character set map
|
||||
; resolves codepage character to DEC charset (A,B,0,1,<)
|
||||
csmap db 0,0,0,0, '0',0,0,0, 0,0,0,0, 0,0,0,0
|
||||
db 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0
|
||||
db 0,'B','B','B', 'B','B','B','B', 'B','B','B','B', 'B','B','B','B'
|
||||
db 'B','B','B','B', 'B','B','B','B', 'B','B','B','B', 'B','B','B','B'
|
||||
|
||||
db 'B','B','B','B', 'B','B','B','B', 'B','B','B','B', 'B','B','B','B'
|
||||
db 'B','B','B','B', 'B','B','B','B', 'B','B','B','B', 'B','B','B','B'
|
||||
db 'B','B','B','B', 'B','B','B','B', 'B','B','B','B', 'B','B','B','B'
|
||||
db 'B','B','B','B', 'B','B','B','B', 'B','B','B','B', 'B','B','B',0
|
||||
|
||||
db 'A','A','A','A', 'A','A','A','A', 'A','A','A','A', 'A','A','A','A'
|
||||
db 'A','A','A','A', 'A','A','A','A', 'A','A','A','A', 'A','A','B','B'
|
||||
db 'A','A','A','A', 'A','A','A','A', 'A','A','A','A', 'A','A','A','A'
|
||||
db '0','0','0','0', '0','0','0','0', '0','0','0','0', '0','0','0','0'
|
||||
|
||||
db '0','0','0','0', '0','0','0','0', '0','0','0','0', '0','0','0','0'
|
||||
db '0','0','0','0', '0','0','0','0', '0','0','0','0', '0','0','0','0'
|
||||
db '>','>','>','>', '>','>','A','>', '>','>','>','>', '>','>','>','>'
|
||||
db '>','0','0','0', '>','>','>','>', '0','0','0','>', 'A','A','0','0'
|
||||
%endif
|
||||
|
||||
; function keys by character
|
||||
; \eO$c, looks up $c to XT scancode
|
||||
; table is like ascii, except it starts at 0x40 '@'
|
||||
fkeysc db 0,0x48,0x50,0x4D, 0x4B,0,0x4F,0, 0x47,0,0,0, 0,0,0,0
|
||||
db 0x3B,0x3C,0x3D,0x3E, 0,0,0,0, 0,0,0,0, 0,0,0,0
|
||||
db 0,0,0,0, 0,0,0,0, 0,0,0,0, 0x42,0,0,0
|
||||
db 0,0,0,0, 0x3F,0x40,0x41,0x43, 0x44,0,0,0, 0,0,0,0
|
||||
|
||||
; function keys by numbers
|
||||
; 10 entries per line
|
||||
; \e[$n~, looks up $n to XT scancode
|
||||
fkeysn db 0,0x47,0x52,0x53,0, 0x49,0x51,0x47,0x4F,0 ; 0-9
|
||||
db 0,0x3B,0x3C,0x3D,0x3E, 0x3F,0,0x40,0x41,0x42 ; 10-19
|
||||
db 0x43,0x44,0,0x85,0x86, 0,0,0,0,0 ; 20-29
|
||||
db 0,0,0,0,0, 0,0,0,0,0 ; 30-39
|
||||
|
||||
align 512
|
||||
Loading…
Reference in New Issue
Block a user