ZXblast - ZX81 memory extension plus USB

Any discussions related to the creation of new hardware or software for the ZX80 or ZX81
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Andy Rea
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Location: notts UK

Re: ZXblast - ZX81 memory extension plus USB

Post by Andy Rea » Sun May 20, 2018 11:14 pm

mrtinb wrote:
Sun May 20, 2018 10:54 pm
I have not have any luck loading data to RAM in this area, due to the bug.
something i have not tried,
I have however had luck with:
  • Loading to ROM in that area e.g. UDG chars
  • Just setting it to RAM, and software that loads in 16-32k relocates itself to area 8-16k
yes i can load data into the Flash rom and access it ok.

when set to ram every byte reads as 255 , writting to it has no effect and it still returns 255 when read
Rumors says that the bug is found and is fixed in the next firmware version. No indication when that will be though.
6 x ZX81, 1 x TS1500 , 1 x +3e, 1 x timex 2040 printer, 1 x timex 2020 cassette deck, siclair printer and some spectrum

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mrtinb
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Re: ZXblast - ZX81 memory extension plus USB

Post by mrtinb » Sun May 20, 2018 11:20 pm

I have however had trouble that the area shifts from RAM to ROM automatically. Sometimes I have to set it for RAM, and try again. If it fails the set to RAM again and try again. Sometimes even if the configuration screen lists this area as RAM, I change it to ROM and back to RAM, to be sure it is selected as RAM.
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

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mrtinb
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Re: ZXblast - ZX81 memory extension plus USB

Post by mrtinb » Mon Aug 27, 2018 10:22 pm

Has anyone tried to have ZXblast and ZXpand connected at the same time. Can they coexist?
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

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