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Mild issue in ZXUNO

Field Programmable Gate Array based devices! As exciting as they sound
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Juan F. Ramirez
Bugaboo
Posts: 5149
Joined: Tue Nov 14, 2017 6:55 am
Location: Málaga, Spain

Mild issue in ZXUNO

Post by Juan F. Ramirez »

I have noticed than when using my ZXUNO and loading some text adventures (core: 48k), like Adventureland, when the game has just loaded and then any key is pressed, border turns black. I think this also happens in DivMMC devices.

Here a pic of the TAP file and a Z80 I made from the TZX:

Image Image

Not a problem as you can keep playing with no problems. Same issue in other similar adventures like Gremlins (spanish) or Ashkeron.

Anyone knows the reason?
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Pobulous
Dynamite Dan
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Joined: Wed Nov 15, 2017 12:51 pm

Re: Mild issue in ZXUNO

Post by Pobulous »

I wonder if a multiface would suffer the same problem.

As far as I know there's no way to know the state of the border, other than by the basic system variable, which won't necessarily be the right value in a machine code program.

Ordinarily it wouldn't matter as the game would reset it as soon as it played any speaker sound, so I presume in those adventures there isn't a keyboard click.

If there's a game tape save or load option that might set it back correctly
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Pobulous
Dynamite Dan
Posts: 1399
Joined: Wed Nov 15, 2017 12:51 pm

Re: Mild issue in ZXUNO

Post by Pobulous »

I just looked at Adventureland and it makes sound, so it should set the border correctly, even if the DivMMC set it incorrectly :?
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