mirror of
https://github.com/cc65/cc65.git
synced 2024-11-20 12:32:58 +00:00
67 lines
1.6 KiB
ArmAsm
67 lines
1.6 KiB
ArmAsm
|
;
|
||
|
|
; Groepaz/Hitmen, 19.10.2015
|
||
|
|
;
|
||
|
|
; high level implementation for the monochrome soft80 implementation
|
||
|
|
;
|
||
|
|
; char cgetc (void);
|
||
|
|
;
|
||
|
|
|
||
|
|
.export soft80mono_cgetc
|
||
|
|
.import soft80mono_internal_cellcolor, soft80mono_internal_cursorxlsb
|
||
|
|
.import soft80mono_internal_nibble
|
||
|
|
.import cursor
|
||
|
|
.importzp tmp1
|
||
|
|
|
||
|
|
.include "c64.inc"
|
||
|
|
.include "soft80.inc"
|
||
|
|
|
||
|
|
soft80mono_cgetc:
|
||
|
|
lda KEY_COUNT ; Get number of characters
|
||
|
|
bne @L3 ; Jump if there are already chars waiting
|
||
|
|
|
||
|
|
jsr invertcursor ; set cursor on or off accordingly
|
||
|
|
|
||
|
|
@L1: lda KEY_COUNT ; wait for key
|
||
|
|
beq @L1
|
||
|
|
|
||
|
|
jsr invertcursor ; set cursor on or off accordingly
|
||
|
|
|
||
|
|
@L3: jsr KBDREAD ; Read char and return in A
|
||
|
|
ldx #0
|
||
|
|
rts
|
||
|
|
|
||
|
|
; Switch the cursor on or off (invert)
|
||
|
|
|
||
|
|
invertcursor:
|
||
|
|
lda cursor
|
||
|
|
bne @invert
|
||
|
|
rts
|
||
|
|
@invert:
|
||
|
|
|
||
|
|
sei
|
||
|
|
lda $01 ; enable RAM under I/O
|
||
|
|
pha
|
||
|
|
lda #$34
|
||
|
|
sta $01
|
||
|
|
|
||
|
|
ldy #$00
|
||
|
|
ldx soft80mono_internal_cursorxlsb
|
||
|
|
@lp1:
|
||
|
|
lda (SCREEN_PTR),y
|
||
|
|
eor soft80mono_internal_nibble,x
|
||
|
|
sta (SCREEN_PTR),y
|
||
|
|
iny
|
||
|
|
cpy #8
|
||
|
|
bne @lp1
|
||
|
|
|
||
|
|
pla
|
||
|
|
sta $01 ; enable I/O
|
||
|
|
cli
|
||
|
|
rts
|
||
|
|
|
||
|
|
;-------------------------------------------------------------------------------
|
||
|
|
; force the init constructor to be imported
|
||
|
|
|
||
|
|
.import soft80mono_init
|
||
|
|
conio_init = soft80mono_init
|