rdos/bdos/main.asm

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754 B
NASM
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cpu 8086
self: equ 0xF000
diskbuf: equ (self-0x200) ; deblocking
stack: equ (diskbuf) ; grows down
defdrv: equ 4
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org self
jmp init
pad 3
self_offset:
db (self >> 8)
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banner:
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db "RDOS 2019-09", 0x0A, 0x0D, '$', 0
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init:
mov sp, stack
mov byte [defdrv], 0x01
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mov dx, banner
call print_string
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call disk_parm_init
mov dx, 0x7F
mov byte [0x7F], 0x7F
mov byte [0x80], 2
call read_buffer
int3
cli
.halt:
hlt
jmp .halt
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init_program:
db "HELLO.COM", 0
; helper function for idle loops
idle:
pushf
sti
hlt
popf
ret
%include "syscall.asm"
%include "con86.asm"
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%include "exec.asm"
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%include "fdc.asm"
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%include "fcb.asm"
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%include "fcbparse.asm"
%include "disk.asm"
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%include "log2.asm"
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%include "dump.asm"