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Re: Faster CPU plug in extensions, How?

Posted: Tue Sep 15, 2020 2:02 pm
by Pr0f
unless you go entirely 3.3v, but then you sacrifice any compatibility with original hardware

Re: Faster CPU plug in extensions, How?

Posted: Tue Sep 15, 2020 5:48 pm
by RalfR
Derek_Stewart wrote:
RalfR wrote:This reminds me of the ABC MegaRAM from Uli Rosowski, which had the same processor.

I tried to buy a MegaRAM, but ABC Elektronik, decided not to supply it and tried to keep the money I paid them.

But I used the German Law Courts to force Andreas Budde to return the money. Which this was successful, but alas no MegRAM... Quite a good idea. pity there was crooked people to spoil the concept.
Which makes me wonder, the PCBs existed (scans elsewhere on Dilwyns site) and as far as I know, there was a review, perhaps in QLW or the german Quasar.

So I think, a few have actually been built.

Re: Faster CPU plug in extensions, How?

Posted: Wed Sep 23, 2020 10:34 pm
by Derek_Stewart
Hi,

It was a pity about the MegaRam board, which I tried to purchase, based on the review in QL World.

But in retrospect, maybe the MegaRam was a bad idea, would it of worked with Minerva, which was the operating system to use at that time.

I always thought an expansion port could be made with connections on the CPU and 8302 sockets. But never got around to to it.

Re: Faster CPU plug in extensions, How?

Posted: Thu Sep 24, 2020 10:02 am
by Dave
The QL CPU sockets were absolutely terrible. While the idea is sound, those red sockets would have ruined the experience for many.

Re: Faster CPU plug in extensions, How?

Posted: Thu Sep 24, 2020 11:11 pm
by Derek_Stewart
Dave wrote:The QL CPU sockets were absolutely terrible. While the idea is sound, those red sockets would have ruined the experience for many.

Can the socket be replaced with a better quality socket?

Re: Faster CPU plug in extensions, How?

Posted: Fri Sep 25, 2020 5:57 am
by Dave
They can, but it is beyond the skill of the average hobbyist.

However, it’s easier to accomplish the goal by making a small expansion card with thru-connector and disabling the internal CPU like the SGC does.

Re: Faster CPU plug in extensions, How?

Posted: Fri Sep 25, 2020 2:00 pm
by Ruptor
Dave wrote:it’s easier to accomplish the goal by making a small expansion card with thru-connector and disabling the internal CPU like the SGC does.
Perhaps remove the 68008 to save power as well?

Re: Faster CPU plug in extensions, How?

Posted: Sat Sep 26, 2020 4:16 am
by Dave
You can, but it draws fairly little power when running, and even less when halted.