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Fixed bugs; and, improved the efficiency of some pce library functions.

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This commit is contained in:
Greg King
2015-11-26 15:06:20 -05:00
committed by Oliver Schmidt
parent 959eff34a3
commit 39694d0aaa
16 changed files with 158 additions and 229 deletions
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34
libsrc/pce/vdc.s
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@@ -8,33 +8,25 @@ HIRES = 1
vdc_init:
lda VDC_CTRL
VREG $00, $0000 ; MAWR
VREG $01, $0000 ; MARR
VREG $05, $0000 ; CR
VREG $06, $0000 ; RCR
VREG $07, $0000 ; BXR
VREG $08, $0000 ; BYR
VREG $09, $0070 ; MWR
VREG $0C, $1702 ; CRTC - VSR
VREG $0D, $00DF ; CRTC - VDS
VREG $0E, $000C ; CRTC - VDE
VREG $0F, $0000 ; DCR
VREG VDC_CR , $0000 ; disable display and interrupts
VREG VDC_BXR, $0000 ; no scrolling
VREG VDC_BYR, $0000
VREG VDC_MWR, $0070 ; 128 x 64 tiles (1024 x 512 pixels)
VREG VDC_VSR, $1702 ; CRTC
VREG VDC_VDR, $00DF ; CRTC - VDS
VREG VDC_VCR, $000C ; CRTC - VDE
VREG VDC_DCR, $0000
.if HIRES
VREG $0A, $0C02 ; CRTC - HSR
VREG $0B, $043C ; CRTC - HDS
VREG VDC_HSR, $0C02 ; CRTC
VREG VDC_HDR, $043C ; CRTC - HDS
lda #$06
sta VCE_CTRL
.else
VREG $0A, $0202 ; CRTC - HSR
VREG $0B, $041F ; CRTC - HDS
VREG VDC_HSR, $0202 ; CRTC
VREG VDC_HDR, $041F ; CRTC - HDS
lda #$04
sta VCE_CTRL
.endif
sta VCE_CTRL
lda VDC_CTRL
rts