fox32os/kernel/shell/commands/disk.asm
2022-12-26 18:26:27 -08:00

34 lines
687 B
NASM

; disk command
shell_disk_command_string: data.str "disk" data.8 0
shell_disk_command:
call shell_parse_arguments
mov r1, 10
call string_to_int
; r0: disk ID
; check if it's in range
cmp r0, 3
ifgt jmp shell_disk_command_out_of_range
; OR it with the IO port to get the current insert state of a disk
or r0, 0x80001000
in r1, r0
cmp r1, 0
ifz ret
; set the current disk ID
mov.8 [shell_current_disk], r0
ret
shell_disk_command_out_of_range:
mov r0, shell_disk_command_out_of_range_string
call print_str_to_terminal
ret
shell_disk_command_out_of_range_string: data.str "invalid disk ID" data.8 10 data.8 0