chris/open-roms
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small CHRIN optimization

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FeralChild64 committed 2019-11-07 22:25:15 +01:00
1 parent 54fd24d704
commit 2398616bee
1 file changed
+7 -7
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c64/kernal/keyboard/chrin_keyboard.s
+7 -7
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@@ -33,12 +33,15 @@ chrin_repeat:
rts rts
not_end_of_input: not_end_of_input:
// Return next byte of waiting input and advance index // Advance index
inc CRSW
// Return next byte of waiting
tay tay
chrin_keyboard_return_byte:
plx_trash_a plx_trash_a
lda (LXSP),y lda (LXSP),y
jsr screen_code_to_petscii jsr screen_code_to_petscii
inc CRSW
clc clc
rts rts
@@ -84,13 +87,10 @@ chrin_enter:
sty INDX sty INDX
lda #$01 lda #$01
sta CRSW sta CRSW
// Return first char of line // Return first char of line
ldy #$00 ldy #$00
plx_trash_a beq chrin_keyboard_return_byte // branch always
lda (LXSP),y
jsr screen_code_to_petscii
clc
rts
empty_line: empty_line:
// For an empty line, just return the carriage return // For an empty line, just return the carriage return