bslathi19/cc65
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

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

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

18
libsrc/cx16/get_tv.s
View File

@@ -1,5 +1,5 @@
;
; 2019-12-22, Greg King
; 2020-05-02, Greg King
;
; unsigned char get_tv (void);
; /* Return the video mode the machine is using. */
@@ -11,17 +11,9 @@
.proc _get_tv
; 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
lda VERA::DATA0
and #$07 ; Get the type of output signal
stz VERA::CTRL ; Use display register bank 0
lda VERA::DISP::VIDEO
and #%00000111 ; Get the type of output signal
ldx #>$0000 ; Promote to unsigned int
rts
.endproc