Video: Replacing VRAM on SVI 328

Resident (55)

16-04-2020, 16:09

This continues the repair from a few weeks ago with that SVI 328 that had so many issues. Here I replace the VRAM and manage to get things working but... then disaster strikes :-(
https://youtu.be/OJHPgS2Eg00

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Par Grauw

Ascended (10768)

16-04-2020, 17:33

Oooh so close, it was working for a second there! Also good tip on using 4164’s to replace the 4116’s, I’ll remember that . Looking forward to the conclusion!

Par lintweaker

Champion (464)

16-04-2020, 19:41

Nice video! I would not mind having an SVI for my collection
Luckily I have never had to work with those old RAM chips which need -5, +5 and +12V!

Par Wierzbowsky

Guardian (3603)

16-04-2020, 20:03

I have the custom test ROM for the SVI-318/328, but you will need the special cartridge board to run it:

http://rbsc.su/en/other_projects/#0110_Spectravideo%20Cartridge

Please contact me if you are interested.

Par llopis

Resident (55)

16-04-2020, 21:50

lintweaker wrote:

Nice video! I would not mind having an SVI for my collection
Luckily I have never had to work with those old RAM chips which need -5, +5 and +12V!

You were lucky enough never to have to deal with a classic ZX Spectrum then :-) Jokes aside, yeah, they're a total pain.

Par llopis

Resident (55)

16-04-2020, 21:52

Alexey wrote:

I have the custom test ROM for the SVI-318/328, but you will need the special cartridge board to run it:

http://rbsc.su/en/other_projects/#0110_Spectravideo%20Cartridge

Please contact me if you are interested.

Thanks! That could come in handy. I'll let you know whenever I can use it. Any idea where I could get those of those custom cartridges? They look really useful.

Par Wierzbowsky

Guardian (3603)

17-04-2020, 02:58

The Gerber files are available and I can share them with you. You can then order 5 or more boards from China. The cartridge needs a very common EPROM chip and a few cheap parts.