2015-09-27 16:12:25 +00:00
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;
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; Low level stuff for screen output/console input
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;
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.constructor soft80_init, 24
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.destructor soft80_shutdown
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2015-09-27 16:49:30 +00:00
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.import soft80_kclrscr
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2015-09-27 16:36:53 +00:00
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.import soft80_textcolor, soft80_bgcolor
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2015-09-27 16:12:25 +00:00
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.include "c64.inc"
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.include "soft80.inc"
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soft80_init:
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lda #$3b
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sta VIC_CTRL1
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lda #$00
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sta CIA2_PRA
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lda #$68
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sta VIC_VIDEO_ADR
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lda #$c8
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sta VIC_CTRL2
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; copy charset to RAM under I/O -> FIXME: generate at runtime
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sei
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lda $01
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pha
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lda #$34
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sta $01
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lda #>soft80_lo_charset0
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sta @hi1+2
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lda #>$d000
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sta @hi2+2
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ldy #8
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@l2:
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ldx #0
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@l1:
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@hi1: lda soft80_lo_charset0,x
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@hi2: sta $d000,x
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inx
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bne @l1
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inc @hi1+2
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inc @hi2+2
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dey
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bne @l2
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pla
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sta $01
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cli
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2015-09-27 16:36:53 +00:00
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lda 646 ; use current textcolor
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jsr soft80_textcolor
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lda VIC_BG_COLOR0 ; use current bgcolor
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and #$0f
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jsr soft80_bgcolor
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2015-09-27 16:12:25 +00:00
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jmp soft80_kclrscr
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soft80_shutdown:
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lda #$1b
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sta VIC_CTRL1
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lda #$03
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sta CIA2_PRA
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lda #$15
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sta VIC_VIDEO_ADR
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rts
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; FIXME: generate the charset at init time, and put it into RAM under I/O
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.include "soft80_charset.s"
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