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103 lines
2.7 KiB
ArmAsm
103 lines
2.7 KiB
ArmAsm
.include "pce.inc"
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.import vce_init
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.import psg_init
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.import vdc_init
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.export initconio
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.constructor initconio, 24
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.macpack longbranch
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initconio:
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;; jsr vdc_init
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jsr vce_init
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jsr psg_init
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jsr conio_init
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jsr set_palette
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st0 #VDC_RCR
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st1 #<$0088
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st2 #>$0088
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rts
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.import colors
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set_palette:
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stz VCE_ADDR_LO
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stz VCE_ADDR_HI
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ldx #0
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@lp:
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.repeat 16
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lda colors,x
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sta VCE_DATA_LO
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lda colors+1,x
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sta VCE_DATA_HI
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.endrepeat
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inx
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inx
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cpx #16*2
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jne @lp
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stz VCE_ADDR_LO
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stz VCE_ADDR_HI
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stz VCE_DATA_LO
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stz VCE_DATA_HI
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rts
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;----------------------------------------------------------------------------
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;
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;----------------------------------------------------------------------------
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.importzp ptr1
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conio_init:
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; Load font
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st0 #VDC_MAWR
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st1 #<$2000
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st2 #>$2000
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; ptr to font data
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lda #<font
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sta ptr1
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lda #>font
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sta ptr1+1
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st0 #VDC_VWR ; VWR
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ldy #$80 ; 128 chars
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charloop: ldx #$08 ; 8 bytes/char
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lineloop:
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lda (ptr1)
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staio VDC_DATA_LO ; bitplane 0
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stzio VDC_DATA_HI ; bitplane 1
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clc ; increment font pointer
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lda ptr1
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adc #$01
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sta ptr1
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lda ptr1+1
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adc #$00
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sta ptr1+1
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dex
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bne lineloop ; next bitplane 0 byte
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ldx #$08 ; fill bitplane 2/3 with 0
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fillloop: st1 #$00
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st2 #$00
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dex
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bne fillloop ; next byte
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dey
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bne charloop ; next character
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ldx #0
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stx BGCOLOR
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inx
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stx CHARCOLOR
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rts
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.rodata
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font:
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.include "vga.inc"
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