Hiding the cursor

[Under4Mhz]

How do I hide the cursor?

It's kind of distracting during game play.

[ChickenMan]

Try a call to A78Eh (42925).

[someone]

Or reprogram the CRTC so that the cursor is off the screen or blank.
This removes any reliance upon ROM calls.

The Synertek R6545 datasheet explains it all.

[Under4Mhz]

Thanks, I didn't realise it used a specific chip for its crt functions

The below code works to hide the cursor, if avoiding rom calls

Code:

void vdu_cursor_hide() {

__asm
    ld      b, #0xff
    ld      c, #0x0d
    ld      a, #14
    out    (#0x0c),a
    out    (c),b
    ld      a, #15
    out    (#0x0c),a
    out    (c),b
__endasm;

}

The CRT datasheet can be found at:

https://datasheetspdf.com/datasheet/R6545.html