mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 19:29:37 +00:00
20 lines
463 B
ArmAsm
20 lines
463 B
ArmAsm
;
|
|
; 2020-05-02, Greg King
|
|
;
|
|
; unsigned char get_tv (void);
|
|
; /* Return the video mode the machine is using. */
|
|
;
|
|
|
|
.export _get_tv
|
|
|
|
.include "cx16.inc"
|
|
|
|
|
|
.proc _get_tv
|
|
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
|