32 lines
429 B
ArmAsm
32 lines
429 B
ArmAsm
|
.define getchar, putchar
|
||
|
|
|
||
|
|
! These getchar and putchar routines can be used for HERMAC computer
|
||
|
|
|
||
|
|
! Read a character from HERMAC-monitor
|
||
|
|
! Character is returned in a-reg
|
||
|
|
|
||
|
|
getchar:
|
||
|
|
in a,0xF1
|
||
|
|
and 1
|
||
|
|
jp z,getchar
|
||
|
|
in a,0xF0
|
||
|
|
cp 0x0D
|
||
|
|
jp nz,1f
|
||
|
|
ld a,0x0A
|
||
|
|
1: ret
|
||
|
|
|
||
|
|
! Write character on HERMAC monitor
|
||
|
|
! Assumes character in a-reg
|
||
|
|
|
||
|
|
putchar:
|
||
|
|
cp 0x0A
|
||
|
|
jp nz,1f
|
||
|
|
ld a,0x1F
|
||
|
|
1: push af
|
||
|
|
2: in a,0xF1
|
||
|
|
and 4
|
||
|
|
jp z,2b
|
||
|
|
pop af
|
||
|
|
out 0xF0,a
|
||
|
|
ret
|