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Updated the cx16 library to the ROM's prerelease 36.

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Greg King
2020-01-10 15:17:23 -05:00
parent 244dc358e5
commit b66f7272af
19 changed files with 357 additions and 214 deletions
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28
libsrc/cx16/videomode.s
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@@ -1,10 +1,10 @@
;
; 2019-11-06, Greg King
; 2020-01-06, Greg King
;
; /* Video mode defines */
; #define VIDEOMODE_40x30 0x00
; #define VIDEOMODE_80x60 0x02
; #define VIDEOMODE_320x240 0x80
; #define VIDEOMODE_320x200 0x80
; #define VIDEOMODE_SWAP (-1)
;
; signed char __fastcall__ videomode (signed char Mode);
@@ -16,29 +16,25 @@
.export _videomode
.import SCRMOD
.import SCREEN_SET_MODE
.include "cx16.inc"
.proc _videomode
tax
clc ; (Get old mode)
jsr SCRMOD
pha
txa
ldx SCREEN_MODE ; Get old mode
phx
sec ; (Set new mode)
jsr SCRMOD
jsr SCREEN_SET_MODE
pla ; Get back old mode
bcs @L1
ldx #>$0000 ; Clear high byte
bcs @L1
rts
; The new mode is invalid. Go back to the old mode. Return -1.
; The new mode is invalid. Go back to the old one. Return -1.
@L1: sec
jsr SCRMOD
lda #<-1
tax
@L1: sta SCREEN_MODE
dex
txa
rts
.endproc