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Updated the cx16 library to the Commander X16's ROM prerelease 37.

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This commit is contained in:
Greg King
2020-05-02 13:46:06 -04:00
parent 31daa706b7
commit cbf0c1d1dd
17 changed files with 447 additions and 233 deletions
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18
libsrc/cx16/set_tv.s
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@@ -1,5 +1,5 @@
;
; 2019-12-22, Greg King
; 2020-05-02, Greg King
;
; void __fastcall__ set_tv (unsigned char);
; /* Set the video mode the machine will use. */
@@ -11,16 +11,10 @@
.proc _set_tv
; Point to the video output register.
stz VERA::CTRL ; Use port 0
ldx #<VERA::COMPOSER::VIDEO
ldy #>VERA::COMPOSER::VIDEO
stx VERA::ADDR
sty VERA::ADDR+1
ldx #^VERA::COMPOSER::VIDEO
stx VERA::ADDR+2
sta VERA::DATA0
stz VERA::CTRL ; Use display register bank 0
eor VERA::DISP::VIDEO
and #%00000111
eor VERA::DISP::VIDEO ; Replace old mode with new mode
sta VERA::DISP::VIDEO
rts
.endproc