Search found 57 matches

by mhudson52
Thu Jan 18, 2018 12:38 am
Forum: ZX Spectrum Lounge
Topic: ZX Spectrum Next
Replies: 24
Views: 1984

Re: ZX Spectrum Next

Karl, that is impressive! Did you do the design of the enclosure?
by mhudson52
Sun Jan 07, 2018 2:32 pm
Forum: Hardware
Topic: ZXpand + AY Finally ...
Replies: 2
Views: 120

Re: ZXpand + AY Finally ...

That sure is a nice looking enclosure you have it in! Very professional. :D
by mhudson52
Sat Jan 06, 2018 11:30 pm
Forum: Hardware
Topic: ZX80 3K Ram Pack memory
Replies: 9
Views: 305

Re: ZX80 3K Ram Pack memory

Making progress. Waiting on the remaining ICs to start populating the boards.
100_5538.JPG
100_5538.JPG (847.81 KiB) Viewed 81 times
by mhudson52
Thu Jan 04, 2018 3:02 am
Forum: WANTED
Topic: Wanted Timex Sinclair 1000 with rampack
Replies: 5
Views: 196

Re: Wanted Timex Sinclair 1000 with rampack

I got lucky with my 2nd TS1000 bought in 2016. Less than $30 including Stateside shipping for the complete package with the box in excellent condition. The computer did not work (as usual) but probably only needs a good ULA and a couple of other bits. It is common over here for the price to be reaso...
by mhudson52
Wed Jan 03, 2018 3:20 pm
Forum: WANTED
Topic: Wanted Timex Sinclair 1000 with rampack
Replies: 5
Views: 196

Re: Wanted Timex Sinclair 1000 with rampack

You might try checking the eBay US site for a TS1000 if you aren't already. They seem to be much more common in the States, as the ZX81 is much more common across the pond.
by mhudson52
Mon Jan 01, 2018 2:42 am
Forum: Hardware
Topic: ZX80 3K Ram Pack memory
Replies: 9
Views: 305

Re: ZX80 3K Ram Pack memory

Just received three Perfect Purple PCBs from OSH Park and very pleased with the results. Now the hardware portion of the ZX80 3K memory pack re-creation is only waiting on the labels for the case, the 74LS138 1 of 8 Decoder / Demultiplexer ICs from Jaycar, and edge connectors. The 3D printed case ha...
by mhudson52
Thu Dec 21, 2017 1:17 am
Forum: Hardware
Topic: ZX80 3K Ram Pack memory
Replies: 9
Views: 305

Re: ZX80 3K Ram Pack memory

Thanks for the info, Paul. Charlie and I were both looking at the same photo and it looked as though longer-than-usual pins were being used on the original pack. I did find what seems to be a good source for edge connectors, though. I have three boards being made made at OSHpark which ought to be he...
by mhudson52
Wed Dec 20, 2017 1:59 pm
Forum: Hardware
Topic: ZX80 3K Ram Pack memory
Replies: 9
Views: 305

Re: ZX80 3K Ram Pack memory

Thanks, guys. I have spent quite a bit of time searching the forum (as I always do before asking) but couldn't find anything regarding the chip speeds. May have missed something buried in a thread. After some discussion with Charlie, finding the proper card edge connector with the long pins may be t...
by mhudson52
Tue Dec 19, 2017 11:39 pm
Forum: Hardware
Topic: ZX80 3K Ram Pack memory
Replies: 9
Views: 305

ZX80 3K Ram Pack memory

Does anyone happen to know the speed of the 2114 RAM chips used in the ZX80 3K memory pack? The files I have by Marcus Brenner do not specify, and most of what I see are 450ns chips, along with a few 200ns. Thanks in advance!