Search found 269 matches

by Pr0f
Mon Apr 16, 2018 12:55 pm
Forum: Hardware
Topic: Testing Tetroid backplane and GC
Replies: 47
Views: 2445

Re: Testing Tetroid backplane and GC

So, the trumpcard rom chip is a 32K device, with approximately one half being the disk driver and other driver support software, and the other half being the toolkit II. I say approximately half, because some of the TK II images are actually larger than 16Kb. From my understanding of the ROM scan lo...
by Pr0f
Fri Apr 13, 2018 12:54 pm
Forum: Hardware
Topic: (S)GC memory
Replies: 2
Views: 168

Re: (S)GC memory

The addressing for the memory comes from the large ingot chip - which is a programmable logic device. The design is quite pin constrained, so upping the memory is not an option I'm afraid.
by Pr0f
Tue Apr 10, 2018 11:27 am
Forum: Hardware
Topic: Testing Tetroid backplane and GC
Replies: 47
Views: 2445

Re: Testing Tetroid backplane and GC

Gold card does work with backplanes, but from my experience it doesn't like long connections, so some backplanes work better than others. Have you tried taking out the 68008 from the QL when you use the Gold card ? I made a flip over backplane for my gold card and ran that on top and upside down of ...
by Pr0f
Tue Apr 03, 2018 10:58 am
Forum: Hardware
Topic: QL Eprom programmer
Replies: 28
Views: 1921

Re: QL Eprom programmer

I have one of these GAL programmer kits from Elektor - It didn't have any intelligence on board if my memory serves me - just TTL registers and serial shifters to setup the various pins and voltages. The programming logic for the GAL chips was documented in the LATTICE data books - and there have be...
by Pr0f
Thu Mar 29, 2018 11:03 am
Forum: General QL Chat
Topic: Stuart Honeyball
Replies: 16
Views: 1120

Re: Stuart Honeyball

So many of the names I remember from the beginning are departing...

Sad news indeed - thoughts are with his family and friends
by Pr0f
Tue Mar 27, 2018 12:16 pm
Forum: Hardware
Topic: QL Eprom programmer
Replies: 28
Views: 1921

Re: QL Eprom programmer

I had a QEPIII, it was a good programmer, if a little limited on the eproms it could program by today's standards. It did seem to offer the potential for expansion though, as the algorithms and circuit were published, but I could not see how you would make use of that in the current gui interface. I...
by Pr0f
Fri Mar 23, 2018 9:09 am
Forum: The Off-Topic Section
Topic: GESPAC G-96 bus documentation
Replies: 0
Views: 219

GESPAC G-96 bus documentation

This really is off topic, but given the very diverse range of people on here I though I would ask. I am after documentation on the GESMFI-1 board, circuit diagram, i/o addresses, pin outs. This is a multifunction peripheral board by GESPAC SA, but can't find much in the way of documentaton for any o...
by Pr0f
Sat Mar 17, 2018 4:55 pm
Forum: For Sale
Topic: Trump Card 768K - no cover/heatsink
Replies: 11
Views: 1166

Re: Trump Card 768K - no cover/heatsink

I believe Dave is taking this, so yes it's no longer available, sorry.
by Pr0f
Sat Mar 10, 2018 9:01 pm
Forum: General QL Chat
Topic: QL 34th Anniversary new hardware.
Replies: 199
Views: 14584

Re: QL 34th Anniversary new hardware.

68030 offers better pipelining and faster burst fill memory access that the 68020 doesn't offer. It also supports faster clock rates than the 68020, and still offers the dynamic bus sizing, which makes it significantly easier to connect to a QL bus, than say a 68040 or later variant. If you have fa...
by Pr0f
Thu Mar 08, 2018 9:19 pm
Forum: Hardware
Topic: Really P'd off
Replies: 36
Views: 1713

Re: Really P'd off

Whopper,

If you do find a circuit diagram for the SGC, I would be interested to have a look - I am keen to know how the 2 74hct244 chips are connected...

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