Search found 417 matches

by Martin A
13 Oct 2019 09:44
Forum: MEMOFEST 2019
Topic: Memofest 2019 at Andys
Replies: 13
Views: 782

Re: Memofest 2019 at Andys

Bill B wrote:
13 Oct 2019 09:29
Sixteen copies of Kelly was a bit much :o
The 1980's Kelly or the current one ??
by Martin A
11 Oct 2019 22:56
Forum: MEMOFEST 2019
Topic: Memofest 2019 at Andys
Replies: 13
Views: 782

Re: Memofest 2019 at Andys

Have an interesting day !
by Martin A
06 Oct 2019 14:21
Forum: OFF TOPIC
Topic: Another Home-Brew - Z180
Replies: 27
Views: 1506

Re: Another Home-Brew - Z180

The EPM7064 might be obsolete, but the PLCC44 version of the ATF1504 is still in production. So you could compile for the EPM7064, and run the output through POF2JED for programming the microchip part. (Quartus II being lightyears ahead of WinCUPL in the free development software world!) The downsid...
by Martin A
15 Sep 2019 15:14
Forum: OFF TOPIC
Topic: Another Home-Brew - Z180
Replies: 27
Views: 1506

Re: Another Home-Brew - Z180

Is it worth feeding 0v to the 2 no connects on the rom socket, just in case you need to fit a larger Flash in there for any reason.

Or jumper them for either voltage to allow for multiple rom images ??
by Martin A
09 Sep 2019 19:50
Forum: OFF TOPIC
Topic: Another Home-Brew - Z180
Replies: 27
Views: 1506

Re: Another Home-Brew - Z180

That's an interesting discovery. Tony's flexible clocking system for the MTX plus uses the EPM7128. That's driving the clock on the Z80 (and everything else), which has the same input spec as the Z180. And it works, even though perhaps it shouldn't, maybe it's a good thing I'd not read that part of ...
by Martin A
01 Sep 2019 12:55
Forum: HARDWARE
Topic: Resurrecting an MTX500.
Replies: 226
Views: 13999

Re: Resurrecting an MTX500.

Did the TIP ever get replaced ??
by Martin A
31 Aug 2019 22:32
Forum: OFF TOPIC
Topic: Another Home-Brew - Z180
Replies: 27
Views: 1506

Re: Another Home-Brew - Z180

How about using stripboard for a backplane, and then making your own daughterboards. A typical bit of 4" stripboard will give you 39 strips. Use the plentiful 40 way 0.1" right angle pins trips and sockets to make the connections like an RC2014 or similar. That only needs soldering and it doesn't ne...
by Martin A
19 Aug 2019 23:17
Forum: OFF TOPIC
Topic: Another Home-Brew - Z180
Replies: 27
Views: 1506

Re: Another Home-Brew - Z180

Which Z180 is it, the likes of Mouser seem to imply the 20mhz part is 3.3v, while the 10mhz and 33mhz are 5v. The data sheet isn't very clear either.
by Martin A
14 Aug 2019 19:14
Forum: OFF TOPIC
Topic: Another Home-Brew - Z180
Replies: 27
Views: 1506

Re: Another Home-Brew - Z180

I'll be very interested to see the SPI results. CF is getting harder to source at reasonable prices do SPI/SD has more of a future. Even cheaper than SD, if you can mount it is something like: https://www.mouser.co.uk/ProductDetail/Winbond/W25Q64JVSSIQ?qs=sGAEpiMZZMtLtwjrIQVJ5joXWQlLhvyQ9W4OsigQXFtO...
by Martin A
27 Jul 2019 12:46
Forum: PROGRAMMING
Topic: Bootstrap and boot blocks
Replies: 99
Views: 5564

Re: Bootstrap and boot blocks

I tried STTY rows 24 columns 40, to match the text screen's raw size and got an error, it seems I can set the row. But columns isn't recognised and I get an error that 40 isn't a legal speed. STTY on it's own after that reported the rows set to 24 and columns 0. I did try STTY /? but the ? doesn't w...