Throw out previous x86 stuff

rom/debug.asm

@@ -1,294 +0,0 @@
-cpu 8086
-org 0x0000
-
-%macro push8086 0
-  push ss
-  push es
-  push ds
-  push di
-  push si
-  push bp
-  push sp
-  push bx
-  push dx
-  push cx
-  push ax
-
-  ; adjust stored SP to be value before interrupt
-  mov bp, sp
-  mov [bp+08], bp
-  add WORD [bp+08], 28
-%endmacro
-
-%macro pop8086 0
-  pop ax
-  pop cx
-  pop dx
-  pop bx
-  add sp, 2 ; skip SP
-  pop bp
-  pop si
-  pop di
-  pop ds
-  pop es
-  add sp, 2 ; skip SS
-%endmacro
-
-rom:
-  db 0x55, 0xAA
-.sectors:
-  db 0x00
-.init:
-  jmp init
-  nop
-
-.name:
-  db "RDOS DEBUG", 0
-
-  times (0x18 - ($-$$)) db 0
-.pcir_ptr:
-  dw 0
-
-  times (0x1A - ($-$$)) db 0
-.pnp_ptr:
-  dw pnp
-
-pnp:
-  db "$PnP"
-.version:
-  db 1 ; version 1
-.length:
-  db 2 ; 2 * 16 length
-  dw 0 ; offset of next header
-  db 0
-.checksum:
-  db 0 ; checksum (filled by fix-rom)
-  dd 0 ; device identifier
-  dw 0 ; manufacturer string
-  dw rom.name ; product name string
-  db 0,0,0 ; device type string
-  db 0x20 ; device indicator, bit for "read cacheable" set
-  dw 0 ; boot connection vector
-  dw 0 ; boot disconnect vector
-  dw 0 ; bootstrap entry point
-  dw 0 ; reserved
-  dw 0
-
-init:
-  mov bx, 0
-  mov dx, isr_divide_error
-  call hook_int
-
-  mov bx, 1
-  mov dx, isr_singlestep
-  call hook_int
-
-  mov bx, 2
-  mov dx, isr_nmi
-  call hook_int
-
-  mov bx, 3
-  mov dx, isr_breakpoint
-  call hook_int
-
-  mov bx, 4
-  mov dx, isr_overflow
-  call hook_int
-
-  ; 5 left out
-
-  mov bx, 6
-  mov dx, isr_invalid_opcode
-  call hook_int
-
-  push cs
-  pop ds
-  mov si, rom.name
-  push cs
-  push si
-  call printf
-  db "%S %X", 0x0A, 0x0D, 0
-  add sp, 4
-
-  retf
-
-; Hook interrupt
-hook_int:
-  ; bx times 4
-  add bx, bx
-  add bx, bx
-  ; store offset
-  mov [bx], dx
-  ; store segment
-  push ax
-  mov ax, cs
-  mov [bx+2], ax
-  pop ax
-  ret
-
-putc:
-  push bx
-  push cx
-  mov ah, 0x0e
-  mov bx, 0x0000
-  int 0x10
-  pop cx
-  pop bx
-  ret
-
-; Names for words in debug frame
-; Two characters per word, 14 words total
-debug_frame_names:
-  ; general-purpose registers
-  db "AXCXDXBXSPBPSIDI"
-  ; extra registers
-  db "DSESSSIPCSFL"
-
-; Names for bits in debug_frame+26 (FL/Flags register)
-; One character per bit, 16 bits total
-debug_frame_flags:
-  db "++++ODIT"
-  db "SZ+A+P+C"
-
-; Print a single register from the frame
-; in	SI	frame offset for register
-debug_frame_register_print:
-  mov bx, debug_frame_names
-  mov al, [cs:bx+si] ; first name char load
-  call putc
-  mov al, [cs:bx+si+1] ; second name char load
-  call putc
-  mov al, '='
-  call putc
-  mov ax, [ss:bp+si] ; value load
-  ; prepare call to print_number
-  push bx
-  push cx
-  mov bx, 0x0010
-  mov cx, 3
-  call print_number_padded
-  pop cx
-  pop bx
-  mov al, ' '
-  call putc
-  ret
-
-debug_frame_print:
-  mov si, 0
-  mov cx, 8
-.reg1loop:
-  call debug_frame_register_print
-  add si, 2
-  loop .reg1loop
-
-  mov dx, [ss:bp+26]
-  mov di, debug_frame_flags
-  mov cx, 0x0010
-.flag_loop:
-  mov al, [cs:di]
-  inc di
-  cmp al, '+'
-  je .next
-  test dx, 0x8000
-  jnz .write
-  mov al, '-'
-.write:
-  call putc
-.next:
-  sal dx, 1
-  loop .flag_loop
-
-  call printf
-  db 0x0A, 0x0D, 0
-
-  mov si, 16
-  mov cx, 5
-.reg2loop:
-  call debug_frame_register_print
-  add si, 2
-  loop .reg2loop
-
-  call printf
-  db 0x0A, 0x0D, 0
-
-  ret
-
-isr_divide_error:
-  push8086
-
-  call printf
-  db 0x0A, 0x0D, "INT 0 - DIVIDE ERROR", 0x0A, 0x0D, 0
-
-  call debug_frame_print
-
-  jmp halt
-
-isr_singlestep:
-  push8086
-
-  call printf
-  db 0x0A, 0x0D, 0
-
-  call debug_frame_print
-
-  ; wait for keypress
-  xor ax, ax
-  int 0x16
-
-  ; enable trace flag so we fire again after next instruction
-  or word [ss:bp+26], 0x0100
-
-  pop8086
-  iret
-
-isr_nmi:
-  push8086
-
-  call printf
-  db 0x0A, 0x0D, "INT 2 - NON-MASKABLE INTERRUPT", 0x0A, 0x0D, 0
-
-  call debug_frame_print
-
-  jmp halt
-
-isr_breakpoint:
-  push8086
-
-  call printf
-  db 0x0A, 0x0D, 0
-
-  call debug_frame_print
-
-  pop8086
-  iret
-
-isr_overflow:
-  push8086
-
-  call printf
-  db 0x0A, 0x0D, "INT 4 - OVERFLOW", 0x0A, 0x0D, 0
-
-  call debug_frame_print
-
-  jmp halt
-
-isr_invalid_opcode:
-  push8086
-
-  call printf
-  db 0x0A, 0x0D, "INT 6 - INVALID OPCODE", 0x0A, 0x0D, 0
-
-  call debug_frame_print
-
-  jmp halt
-
-halt:
-  call printf
-  db "HALTED", 0x0A, 0x0D, 0
-.loop:
-  hlt
-  jmp halt
-
-%include "printf.asm"
-
-align 512