Search found 2437 matches

by Dave
Mon Jan 13, 2020 6:29 pm
Forum: General QL Chat
Topic: Beyond Super Gold Card
Replies: 87
Views: 4425

Re: Beyond Super Gold Card

The entirety of my comment comes from one simple fact: the available 68k cores for use in FPGAs that are cycle-accurate and complete enough to run QL operating systems are limited to 68000 implementations, with no instruction or data cache and no 32-bit external accesses. It seems using an external ...
by Dave
Mon Jan 13, 2020 3:52 pm
Forum: General QL Chat
Topic: Beyond Super Gold Card
Replies: 87
Views: 4425

Re: Beyond Super Gold Card

Getting back on topic.... Is there a possibility to use a physical CPU (eg: 68EC030 or 040?) with the non-68000 parts of the Q68 FPGA core? This would use a stock CPU, and the FPGA's graphics/IO capability. I imagine the main thing that would change after eliminating the 68K core would be some provi...
by Dave
Mon Jan 13, 2020 3:43 pm
Forum: Hardware
Topic: QL-VGA
Replies: 33
Views: 1329

Re: QL-VGA

As far as I know, there isn't a version of the 8301 ULA that actually implements this. It was obviously planned but may never have been implemented. Actually I tried "POKE hex('18063'),64" on my German issue 6 or something QL and the display gets weird and the poll frequency changes to 60...
by Dave
Mon Jan 13, 2020 3:42 pm
Forum: Hardware
Topic: PSU Question - Better safe than sorry
Replies: 12
Views: 348

Re: PSU Question - Better safe than sorry

The QL PSU has a transformer and is unswitched, so the live/neutral matter is moot and it really does not matter which way it is wired. It is a double insulated power supply, so no ground.

The 240V PSU will work without issue on 210V to 270V, 50-60Hz.
by Dave
Sun Jan 12, 2020 8:21 pm
Forum: The Off-Topic Section
Topic: Happy Birthday!
Replies: 214
Views: 72332

Re: Happy Birthday!

It must be remembered that America was the first country so large that the month a message was sent was important data - until the 1920s, it took 6-8 weeks for messages to pass from coast to coast. I know Americans like to think so. However, Russia, Canada and China are bigger. I guess Russia is so...
by Dave
Sun Jan 12, 2020 4:54 pm
Forum: The Off-Topic Section
Topic: Happy Birthday!
Replies: 214
Views: 72332

Re: Happy Birthday!

swensont wrote:January 25, 2000


It must be remembered that America was the first country so large that the month a message was sent was important data - until the 1920s, it took 6-8 weeks for messages to pass from coast to coast.
by Dave
Sun Jan 12, 2020 4:41 pm
Forum: Hardware
Topic: QL-VGA
Replies: 33
Views: 1329

Re: QL-VGA

These US QLs are definitely outputting legal NTSC timings in mode 8, and 'standard' timings in mode 4. The 8301 standard, not different from the 8301s found in the UK. Of course, that means at 60 Hz with PAL pixel format would require a 20% clock increase.
by Dave
Sun Jan 12, 2020 4:36 pm
Forum: Hardware
Topic: Replacements for Zx8301 / Zx 8302 / IPC
Replies: 25
Views: 1336

Re: Replacements for Zx8301 / Zx 8302 / IPC

I saw two distinct types of rubber mat. A brownish tinged type and a blueish tinged type. The blueish ones seem to last forever - they'll probably be floating in space long after this planet is gone. The brown ones tended to get "sticky" as the phthalates left them, then they would dry ver...
by Dave
Sat Jan 11, 2020 8:29 pm
Forum: General QL Chat
Topic: Beyond Super Gold Card
Replies: 87
Views: 4425

Re: Beyond Super Gold Card

My QL video card supports 2/4/8/16 bpp - if the OS can support it. Just for some colour depths the bit order is wrong for native QL-dom, and it doesn't natively support modes 4 and 8, which is a bummer.

But hey, it's something.
by Dave
Sat Jan 11, 2020 8:18 pm
Forum: The Off-Topic Section
Topic: Happy Birthday!
Replies: 214
Views: 72332

Re: Happy Birthday!

Happy 52nd to me. :D