Search found 960 matches

by Peter
Fri Feb 28, 2020 9:22 am
Forum: Compatibles Corner
Topic: Q68 Crashes
Replies: 22
Views: 573

Re: Q68 Crashes

Is there any indication that the crash occurs without using QD B.05?
by Peter
Mon Feb 24, 2020 10:52 am
Forum: Compatibles Corner
Topic: Q68 Crashes
Replies: 22
Views: 573

Re: Q68 Crashes

Is there any indication that the crash occurs without using QD?
by Peter
Sun Feb 23, 2020 9:58 pm
Forum: Compatibles Corner
Topic: Q68 Crashes
Replies: 22
Views: 573

Re: Q68 Crashes

Also maybe try the same same setup on a different computer with the same SMSQ/E configuration, this would check if the Q68 or SMSQ/E is causing the problem Even if it appears to work elsewhere, that does not necessarily mean the Q68 is at fault. Different machines have different memory layouts and ...
by Peter
Sun Feb 23, 2020 9:32 am
Forum: Compatibles Corner
Topic: Q68 Crashes
Replies: 22
Views: 573

Re: Q68 Crashes

Q68 hasn't given me any problems (other that it tends to forget the clock every now and then when switched off for more than 4 weeks) since I have it and I use it heavily The Q68 uses a SuperCap with a capacity of 100000 µF for clock backup. At design time, larger SuperCaps were still expensive. I ...
by Peter
Sun Feb 23, 2020 9:15 am
Forum: Compatibles Corner
Topic: Q68 Crashes
Replies: 22
Views: 573

Re: Q68 Crashes

Artificer wrote:No options for recovery.

Which "option for recovery" would you expect on an OS without memory protection, after a piece of software crashed?
Artificer wrote:Does the Q68 overheat?

No. The Q68 doesn't even heat up at all.
by Peter
Fri Feb 21, 2020 12:24 pm
Forum: Compatibles Corner
Topic: Q68 Serial devices
Replies: 11
Views: 489

Re: Q68 Serial devices

BTW, for $18 currently on eBay they are selling USB to PS/2 converters. These things usually run closer to $100 Thanks for spotting this :!: Indeed it looks like an active converter, which is needed if someone wants to use USB-only devices with the Q68! (Some wired keyboards/mice are actually USB+P...
by Peter
Thu Feb 20, 2020 12:03 pm
Forum: Compatibles Corner
Topic: Q68 Serial devices
Replies: 11
Views: 489

Re: Q68 Serial devices

A further question, why did you not design the Q68 with 2 RS232 ports as had the original QL, Qx0 and Aurora? It was a space/resource compromise. I wanted a decent metal case, where I can design the panels, and I didn't want it larger. Also, freeing the required FPGA pins for one more SER would hav...
by Peter
Wed Feb 19, 2020 3:20 pm
Forum: Hardware
Topic: PCI Express video
Replies: 15
Views: 684

Re: PCI Express video

I thought I had covered this with the explanation that what was being considered was a circuit / module that could be applied to a recreation or as an add on card to existing bbql - so FPGA with the CPU on board doesn't really fit the requirement if it's just a video add on for existing hardware. T...
by Peter
Wed Feb 19, 2020 12:29 pm
Forum: Hardware
Topic: PCI Express video
Replies: 15
Views: 684

Re: PCI Express video

Peter wrote:Since every modern FPGA suitable for HDMI has enough space to include a CPU, my question is: Would you still want the CPU outside the graphics chip, and why?

How about a reply on this?
by Peter
Wed Feb 19, 2020 11:29 am
Forum: Hardware
Topic: PCI Express video
Replies: 15
Views: 684

Re: PCI Express video

I have been thinking about this for some time too, and trying to figure out a way of getting QL video out of an HDMI socket. There are several hurdles and problems, but some thoughts below: 1) QL screen memory use is a little strange in the layout - so that tends to rule out all but a large CPLD or...