To Masters who knows ZX81 ROM by heart in their sleep

Any discussions related to the creation of new hardware or software for the ZX80 or ZX81
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mrtinb
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To Masters who knows ZX81 ROM by heart in their sleep

Post by mrtinb » Sat Apr 28, 2018 9:46 am

I know most of you is not as enthusiastic about the Lambda 8300 as me. And therefor have skipped the discussion in the Lambda forum below.

I'm asking for help to change the ROM to not test for PAL/NTSC but simply hardcode it for PAL. I've hardcoded the MARGIN read to $37 but unfortunately that is not enough.

Can anyone help where else to change the ROM?

Please help in the thread below:

viewtopic.php?f=20&p=30750#p30748
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

dr beep
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Re: To Masters who knows ZX81 ROM by heart in their sleep

Post by dr beep » Sat Apr 28, 2018 11:09 am

What picture do you get from loading 1 of my 1K hires games?

This could determine if it is lowres or hirescontrol (timer per line).
The jumping text is what I had too when writing lowres too soon (not enough NL) to the screen.

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