Search found 188 matches

by Pr0f
Sat Feb 03, 2018 9:24 pm
Forum: Software & Programming
Topic: Odd behavour
Replies: 24
Views: 966

Re: Odd behavour

which ROM is that you are using for QDOS?
by Pr0f
Sat Feb 03, 2018 9:23 pm
Forum: Software & Programming
Topic: Odd behavour
Replies: 24
Views: 966

Re: Odd behavour

According to Qdos keywords manual: LOCal allows identifiers to be defined to be LOCal to a function or procedure. Local identifiers only exist within the function or procedure in which they are defined, or in procedures and functions called from the function or procedure in which they are defined. T...
by Pr0f
Sat Feb 03, 2018 5:31 pm
Forum: Software & Programming
Topic: Odd behavour
Replies: 24
Views: 966

Re: Odd behavour

x is not defined as local in function two
by Pr0f
Fri Feb 02, 2018 12:57 pm
Forum: Wanted
Topic: Miracle Super Gold card
Replies: 41
Views: 2521

Re: Miracle Super Gold card

Did anyone have the abel, equations or JED files for the SGC? I thought there was mention of it on this thread.... The basic building blocks look to be similar to GC card, in that there is an FDC, 64K eprom, an RTC chip - these are common to both GC and SGC - I suspect even to the addresses used. Th...
by Pr0f
Thu Feb 01, 2018 8:33 pm
Forum: Software & Programming
Topic: Mice and mouse queues...
Replies: 11
Views: 632

Re: Mice and mouse queues...

I'm learning a lot...
by Pr0f
Thu Feb 01, 2018 8:33 pm
Forum: Software & Programming
Topic: Mice and mouse queues...
Replies: 11
Views: 632

Re: Mice and mouse queues...

A serial mouse connected to SuperHermes (no "SerMouse" driver) works pretty well with the PE. This needs the IPC_EXT driver that comes with SuperHermes and the IPC_MOUSE command. A serial mouse integrated with the DiY Toolkit's serial mouse driver should probably work as well (Never tried...
by Pr0f
Thu Feb 01, 2018 2:26 pm
Forum: Hardware
Topic: All RAM chips destroyed??
Replies: 56
Views: 2784

Re: All RAM chips destroyed??

It really does sound like one of your DRAM chips is loading the bus. The fact that swapping the ZX8301 to another machine works, but it only gets warm in this machine... The piggy back method may not work in this case either, if the DRAM chip is holding the bus either high or low. If you have a scop...
by Pr0f
Wed Jan 31, 2018 11:14 am
Forum: Hardware
Topic: All RAM chips destroyed??
Replies: 56
Views: 2784

Re: All RAM chips destroyed??

I think this is the issue 5 board - so no HAL chip, That does mean that the ZX8302 is on the same bus as the memory - so if that's faulty it may be causing problems... Yes it is exactly an iss5 board. So a faulty ZX8302 may cause RAM problems on an iss5 board and may work on an iss6 instead? I thou...
by Pr0f
Wed Jan 31, 2018 8:59 am
Forum: Hardware
Topic: All RAM chips destroyed??
Replies: 56
Views: 2784

Re: All RAM chips destroyed??

If touching the processor changes the screen output, then it could imply a lose pin in the socket, or it could be a capactive effect altering the oscillations of the crystal adjacent to the ZX8301 chip - the 15MHz crystal. Difficult to see in the picture - but has someone resoldered the resistor nea...
by Pr0f
Wed Jan 31, 2018 7:32 am
Forum: Hardware
Topic: All RAM chips destroyed??
Replies: 56
Views: 2784

Re: All RAM chips destroyed??

I think this is the issue 5 board - so no HAL chip, That does mean that the ZX8302 is on the same bus as the memory - so if that's faulty it may be causing problems...

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