Search found 1021 matches

by tofro
Sat Apr 29, 2017 5:37 pm
Forum: Hardware
Topic: Sinclar QL not working
Replies: 3
Views: 118

Re: Sinclar QL not working

There is a Spanish forum

http://foro.speccy.org/viewforum.php?f= ... a954f1f388

that has a nice QL section and lots of helpful and knowledgeable people. Maybe you try to look for some help there.

Tobias
by tofro
Sat Apr 29, 2017 5:31 pm
Forum: Hardware
Topic: Q68 compatible peripherals on other QL systems
Replies: 25
Views: 876

Re: Q68 compatible peripherals on other QL systems

Yes, but there is the remark "omitting requires address decoder... also assert DSMC" which led me to the assumption that some QIMI devices have that incomplete decode also. I'd rather think that means "you can leave the red part away" (not relying on /PCEN), "but then you n...
by tofro
Sat Apr 29, 2017 4:09 pm
Forum: Hardware
Topic: Q68 compatible peripherals on other QL systems
Replies: 25
Views: 876

Re: Q68 compatible peripherals on other QL systems

I hope to be wrong, but from a very quick look at the picture on Dilwyn's site, it seems like QIMI contaminates lots of the area between $18xxx and $1Bxxx by incomplete decoding. It doesn't seem to me like this is QIMI's fault, but rather incomplete decoding of the original QL memory done by the 83...
by tofro
Sat Apr 29, 2017 9:40 am
Forum: Hardware
Topic: Random hardware ideas!
Replies: 47
Views: 1735

Re: Random hardware ideas!

Could do with a prototyping PCB for ROM port, if enough are produced it could help with cheap DIY projects (soundchip, etc). Maybe with a fixed PAL to provide simple I/O facility to prototyping area (ie. using address lines for Write). So hopefully, if the worst happens, only the PAL is fried. Anyo...
by tofro
Thu Apr 27, 2017 8:20 pm
Forum: Hardware
Topic: Random hardware ideas!
Replies: 47
Views: 1735

Re: Random hardware ideas!

Maybe I misunderstood - i was assuming an 680>=20 CPU. Hard to keep up with the complete discussion. A 68008 would most probably have a hard time feeding the DAC continuously.

Tobias
by tofro
Thu Apr 27, 2017 7:18 pm
Forum: Hardware
Topic: Random hardware ideas!
Replies: 47
Views: 1735

Re: Random hardware ideas!

SSS should be reasonably simple in case you have sufficient CPLD capacity and pins. It consists of an 8-bit port, an R2R ladder, a timer and an interrupt, maybe an OpAmp or a transistor in the simplest case. Adding a hardware queue like in Q68 might be a bit more demanding. In case you use proper ad...
by tofro
Sun Apr 23, 2017 11:32 am
Forum: Software & Programming
Topic: QPC2 Windows Quirk
Replies: 2
Views: 171

Re: QPC2 Windows Quirk

That's actually not a quirk. That is the normal behaviour of a running Pointer Environment. If you'd run PE (i.e ptrgen, wman and hot_rext) on your QL, it would behave exactly identical. The main difference is that PE is not optional but always active with SMSQ/E, while you have the choice in QDOS. ...
by tofro
Sun Apr 23, 2017 11:28 am
Forum: Hardware
Topic: Random hardware ideas!
Replies: 47
Views: 1735

Re: Random hardware ideas!

OK, geddid. Once you make the buffer large enough, you're fine without interrupts. Large buffers, however, make stuff like WinAmps "visual equalizer" more difficult to implement - It's hard to know "what's played at the moment" - That's already hard to do with the current SSS dri...
by tofro
Sun Apr 23, 2017 8:08 am
Forum: Hardware
Topic: Random hardware ideas!
Replies: 47
Views: 1735

Re: Random hardware ideas!

The Vinculum chips are far easier to implement than a "standard" USB host controller. They actually might be a solution for the QL. But I go with Peter in saying "Solution? - To what problem?". Keyboard/Mouse is not really a problem, storage neither, and printing should be solved...
by tofro
Sun Apr 23, 2017 7:31 am
Forum: General QL Chat
Topic: SERNET question
Replies: 4
Views: 266

Re: SERNET question

Sernet used to be part of the SMSQ/E distribution of the Q40 and Q60 computers and was also offered separately, I think through Jochen Merz.
I have no idea about its current legal status.

Tobias

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