initial import, completely untested, does not compile yet

2014-11-29 14:18:48 +01:00
parent fed3179d3b
commit faccc5a3d6
23 changed files with 1974 additions and 0 deletions
--- a/libsrc/pcengine/vdc.s
+++ b/libsrc/pcengine/vdc.s
@@ -0,0 +1,46 @@
+
+				.include "pcengine.inc"
+
+HIRES = 1
+
+            .export vdc_init
+
+vdc_init:
+                        ;;lda     $0000
+						;;.byte $ad,0,0
+
+						ldaio	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 ; MAWR
+                        VREG    $0C, $1702 ; CRTC - VSR
+                        VREG    $0D, $00DF ; CRTC - VDS
+                        VREG    $0E, $000C ; CRTC - VDE
+                        VREG    $0F, $0000 ; DCR
+
+                        .if      HIRES
+
+                        VREG    $0A, $0C02 ; CRTC - HSR
+                        VREG    $0B, $043C ; CRTC - HDS
+                        lda     #$06
+                        sta     VCE_CTRL
+
+                        .else
+
+                        VREG    $0A, $0202 ; CRTC - HSR
+                        VREG    $0B, $041F ; CRTC - HDS
+                        lda     #$04
+                        sta     VCE_CTRL
+
+                        .endif
+
+                        ;;lda     $0000
+						;;.byte $ad,0,0
+
+						ldaio VDC_CTRL
+                        rts