fox32os/applications/serial/main.asm
2023-03-23 00:37:16 -07:00

70 lines
1.2 KiB
NASM

; serial terminal - spawn sh.fxf on the serial port
; start an instance of sh.fxf
call get_current_disk_id
mov r1, r0
mov r0, sh_fxf_name
mov r2, stream_struct
mov r3, 0
mov r4, 0
mov r5, 0
mov r6, 0
call launch_fxf_from_disk
cmp r0, 0xFFFFFFFF
ifz call end_current_task
mov.8 [shell_task_id], r0
event_loop:
movz.8 r0, [shell_task_id]
call is_task_id_used
ifz call end_current_task
call yield_task
rjmp event_loop
print_str_to_terminal:
push r0
push r1
print_str_to_terminal_loop:
mov r1, [r0]
cmp r1, 0
ifz jmp print_str_to_terminal_out
out 0, r1
inc r0
jmp print_str_to_terminal_loop
print_str_to_terminal_out:
pop r1
pop r0
ret
stream_struct:
data.8 0x00
data.16 0x00
data.32 0x00
data.8 0x01
data.32 stream_read
data.32 stream_write
shell_task_id: data.8 0
sh_fxf_name: data.strz "sh.fxf"
stream_read:
in r0, 0
ret
stream_write:
push r0
movz.8 r0, [r0]
bts r0, 7
ifnz jmp stream_write_special
out 0, r0
pop r0
ret
stream_write_special:
cmp r0, 0x8a
ifz out 0, ' '
pop r0
ret
#include "../../../fox32rom/fox32rom.def"
#include "../../fox32os.def"