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Updated cx16 to match the Commander X16 ROMs and emulator, release 34.

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This commit is contained in:
Greg King
2019-11-16 13:11:40 -05:00
parent 4dda5d2173
commit d78133e1f0
37 changed files with 607 additions and 182 deletions
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16
libsrc/cx16/set_tv.s
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@@ -1,5 +1,5 @@
;
; 2019-09-20, Greg King
; 2019-11-06, Greg King
;
; void __fastcall__ set_tv (unsigned char);
; /* Set the video mode the machine will use. */
@@ -12,20 +12,18 @@
.proc _set_tv
php
pha
sei ; Don't let interrupts interfere
; Point to the video output register.
stz VERA::CTRL ; Use port 0
lda #<VERA::COMPOSER::VIDEO
ldx #>VERA::COMPOSER::VIDEO
ldy #^VERA::COMPOSER::VIDEO
sta VERA::ADDR
stx VERA::ADDR+1
sty VERA::ADDR+2
ldx #<VERA::COMPOSER::VIDEO
ldy #>VERA::COMPOSER::VIDEO
stx VERA::ADDR
sty VERA::ADDR+1
ldx #^VERA::COMPOSER::VIDEO
stx VERA::ADDR+2
pla
sta VERA::DATA0
plp ; Re-enable interrupts
rts