Faster CPU plug in extensions, How?

A place to discuss general QL issues.
User avatar
Pr0f
Super Gold Card
Posts: 658
Joined: Thu Oct 12, 2017 9:54 am

Re: Faster CPU plug in extensions, How?

Postby Pr0f » Tue Sep 15, 2020 2:02 pm

unless you go entirely 3.3v, but then you sacrifice any compatibility with original hardware


User avatar
RalfR
Gold Card
Posts: 446
Joined: Fri Jun 15, 2018 8:58 pm

Re: Faster CPU plug in extensions, How?

Postby RalfR » Tue Sep 15, 2020 5:48 pm

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.


Derek_Stewart
QL Wafer Drive
Posts: 1915
Joined: Mon Dec 20, 2010 11:40 am
Location: Runcorn, Cheshire, UK

Re: Faster CPU plug in extensions, How?

Postby Derek_Stewart » Wed Sep 23, 2020 10:34 pm

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.


Regards,

Derek
User avatar
Dave
SandySuperQDave
Posts: 2508
Joined: Sat Jan 22, 2011 6:52 am
Location: Austin, TX
Contact:

Re: Faster CPU plug in extensions, How?

Postby Dave » Thu Sep 24, 2020 10:02 am

The QL CPU sockets were absolutely terrible. While the idea is sound, those red sockets would have ruined the experience for many.


Derek_Stewart
QL Wafer Drive
Posts: 1915
Joined: Mon Dec 20, 2010 11:40 am
Location: Runcorn, Cheshire, UK

Re: Faster CPU plug in extensions, How?

Postby Derek_Stewart » Thu Sep 24, 2020 11:11 pm

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?


Regards,

Derek
User avatar
Dave
SandySuperQDave
Posts: 2508
Joined: Sat Jan 22, 2011 6:52 am
Location: Austin, TX
Contact:

Re: Faster CPU plug in extensions, How?

Postby Dave » Fri Sep 25, 2020 5:57 am

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.


User avatar
Ruptor
Trump Card
Posts: 177
Joined: Fri Dec 20, 2019 2:23 pm

Re: Faster CPU plug in extensions, How?

Postby Ruptor » Fri Sep 25, 2020 2:00 pm

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?


User avatar
Dave
SandySuperQDave
Posts: 2508
Joined: Sat Jan 22, 2011 6:52 am
Location: Austin, TX
Contact:

Re: Faster CPU plug in extensions, How?

Postby Dave » Sat Sep 26, 2020 4:16 am

You can, but it draws fairly little power when running, and even less when halted.



Who is online

Users browsing this forum: No registered users and 5 guests