dk'tronics 4K Graphics ROM

Discussions about Sinclair ZX80 and ZX81 Hardware
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XavSnap
Posts: 1940
Joined: Sat May 10, 2008 4:23 pm
Location: 'Zx81 France' Fb group.

Re: dk'tronics 4K Graphics ROM

Post by XavSnap »

Vtr UDG card:
http://zx81.ordi5.free.fr/vtr/
Pictures, PCB, and wiring diagrams: http://zx81.ordi5.free.fr/vtr/download/ ... ECO%5D.pdf
UDG.jpg
UDG.jpg (53.59 KiB) Viewed 2250 times
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
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1024MAK
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Location: Looking forward to summer in Somerset, UK...

Re: dk'tronics 4K Graphics ROM

Post by 1024MAK »

Schematic:
dk'tronics 4K Graphics PCB schematic.png
dk'tronics 4K Graphics PCB schematic
(201.64 KiB) Downloaded 128 times
dK'tronics 4K Graphics ROM

Here's some pictures of the one that I have:
Image
Image
Image
Image

Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp

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