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rdos/boot/kernel.asm

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Improve ordering of binary data in kernel
2020-07-04 10:35:38 +02:00
cpu 8086
Fuck up the kernel, i have other ideas now
2020-09-15 21:44:32 +02:00
org 0x7C00
Implement some PoC of reading from disk
2020-04-15 00:17:58 +02:00
Improve ordering of binary data in kernel
2020-07-04 10:35:38 +02:00
%include "inc/bpb.asm"
Fuck up the kernel, i have other ideas now
2020-09-15 21:44:32 +02:00
%include "inc/mbr.asm"
Build drive selection logic for FCBs
2020-10-13 22:10:23 +02:00
%include "inc/fcb.asm"
Protypical implementation of DPT copying
2020-10-25 00:50:23 +02:00
%include "inc/dpt.asm"
Implement some PoC of reading from disk
2020-04-15 00:17:58 +02:00
Fuck up the kernel, i have other ideas now
2020-09-15 21:44:32 +02:00
; kernel stack size in words
%define stacksize 512
kernel: First steps of calculating drive tab data from BPB
2020-08-31 22:11:05 +02:00
Improve ordering of binary data in kernel
2020-07-04 10:35:38 +02:00
init: cli
xor ax, ax
mov ds, ax
mov es, ax
mov ss, ax
mov sp, ( stack+stacksize )
Implement whacky first version for 25h disk read
2020-04-26 23:14:34 +02:00
boot/kernel: print banner
2020-09-27 17:45:19 +02:00
print_banner: mov si, banner
mov ah, 0x0e
xor bx, bx
.loop: lodsb
int 0x10
cmp al, 0x0D
jnz .loop
kernel: implement diskio using drive table
2020-08-27 22:52:16 +02:00
Build drive selection logic for FCBs
2020-10-13 22:10:23 +02:00
cmp dl, 0x80
jc .k
sub dl, (0x80-2)
.k: mov [defdrv], dl
Lay out skeletons for FCB handling
2020-10-11 23:33:01 +02:00
call dskrst
Implement map-like sector access for floppy drives
2020-12-16 00:29:35 +01:00
mov dl, [defdrv]
call logdrv
xor ax, ax
xor dx, dx
call maprd
inc word [dskbuf+0x82]
call dirty
call flush
Lay out skeletons for FCB handling
2020-10-11 23:33:01 +02:00
Fuck up the kernel, i have other ideas now
2020-09-15 21:44:32 +02:00
hlt: hlt
jmp hlt
Implement int 29h: Fast console output
2020-04-20 19:13:06 +02:00
Protypical implementation of DPT copying
2020-10-25 00:50:23 +02:00
%include "kernel/far.asm"
Build drive selection logic for FCBs
2020-10-13 22:10:23 +02:00
%include "kernel/fcb.asm"
%include "kernel/drive.asm"
section .data
Lay out skeletons for FCB handling
2020-10-11 23:33:01 +02:00
%defstr VERSIONSTR VERSION
banner: db "RDOS ", VERSIONSTR, 0x0A, 0x0D
Load kernel from reserved sectors in fatfs
2020-09-17 07:57:46 +02:00
Build drive selection logic for FCBs
2020-10-13 22:10:23 +02:00
testfcb: db 0
db "HELLO ", "COM"
times 30 db 0
Load kernel from reserved sectors in fatfs
2020-09-17 07:57:46 +02:00
Place variables into area after binary
2020-04-23 21:36:20 +02:00
section .bss
Fuck up the kernel, i have other ideas now
2020-09-15 21:44:32 +02:00
stack: resb stacksize