added size optimized monochrom soft80 driver

2015-10-19 02:49:32 +02:00
parent d6d016bb80
commit 60334c40e6
7 changed files with 674 additions and 0 deletions
--- a/libsrc/c64/soft80mono_kplot.s
+++ b/libsrc/c64/soft80mono_kplot.s
@@ -0,0 +1,52 @@
+
+;
+; Groepaz/Hitmen, 19.10.2015
+;
+; lowlevel kplot function for the monochrome soft80 implementation
+;
+
+        .export         soft80mono_kplot
+        .import         soft80mono_internal_cursorxlsb
+
+        .include        "c64.inc"
+        .include        "soft80.inc"
+
+soft80mono_kplot:
+        bcs     @getpos
+
+        stx     CURS_Y
+        sty     CURS_X
+
+        sei
+        lda     $01
+        pha
+        lda     #$34                            ; enable RAM under I/O
+        sta     $01
+
+        ; calc pointer to bitmap
+        lda     soft80_bitmapylo,x
+        clc
+        adc     soft80_bitmapxlo,y
+        sta     SCREEN_PTR
+        lda     soft80_bitmapyhi,x
+        adc     soft80_bitmapxhi,y
+        sta     SCREEN_PTR+1
+
+        tya
+        and     #1
+        sta     soft80mono_internal_cursorxlsb
+
+        pla
+        sta     $01
+        cli
+
+@getpos:
+        ldx     CURS_Y
+        ldy     CURS_X
+        rts
+
+;-------------------------------------------------------------------------------
+; force the init constructor to be imported
+
+        .import soft80mono_init
+conio_init      = soft80mono_init