Search found 219 matches

by gammaray
Mon Oct 16, 2017 8:26 pm
Forum: ZX BASIC
Topic: Loading/Editing/Saving .p files..?
Replies: 16
Views: 192

Re: Loading/Editing/Saving .p files..?

Everything else but that one...maybe cuz I am in the U.S? Selective copyright protection?
by gammaray
Mon Oct 16, 2017 8:16 pm
Forum: ZX BASIC
Topic: Loading/Editing/Saving .p files..?
Replies: 16
Views: 192

Re: Loading/Editing/Saving .p files..?

Does anybody have the "DskCenter_DLL.zip" for ZXTOOLS which seems to be unavailable?
by gammaray
Sun Oct 15, 2017 9:23 pm
Forum: Sinclair Misc
Topic: MEMOTECH
Replies: 15
Views: 248

Re: MEMOTECH

In order to give the thread a different direction : Memotech expansions were great when they were first offered but nowadays make little sense to recreate. Rampack with dynamic ram should better be static ram today. And with ZXPand and zxblast these are available. Hrg module are not necessary any m...
by gammaray
Sat Oct 14, 2017 9:16 pm
Forum: Sinclair Misc
Topic: MEMOTECH
Replies: 15
Views: 248

Re: MEMOTECH

I inquired about it. The clock is ticking, waiting for response...
by gammaray
Fri Oct 13, 2017 9:26 pm
Forum: Hardware
Topic: What is the going price to have EPROMs burnt?
Replies: 14
Views: 171

Re: What is the going price to have EPROMs burnt?

Depends on humidity. If always been low, it should fire up.

(The mother or daughter board circuits can oxidize with moisture which is why the clothes dryer in garage should be vented outdoors)
by gammaray
Fri Oct 13, 2017 9:05 pm
Forum: Hardware
Topic: What is the going price to have EPROMs burnt?
Replies: 14
Views: 171

Re: What is the going price to have EPROMs burnt?

Am I mistaken or does this help?

http://www.danbbs.dk/~rmadrm/eprom9.htm

If it does, I have some 8255's I need burned for SDK-85
;)
by gammaray
Thu Oct 12, 2017 2:58 pm
Forum: Hardware
Topic: Memotech Memopak 32k
Replies: 11
Views: 252

Re: Memotech Memopak 32k

From our forum a link to http://www.zx81.de/memotech/memory64.txt

explains 64K function, the 4 dipswitch setting seem to be for setting 8-16K
by gammaray
Tue Oct 10, 2017 3:28 pm
Forum: Sinclair Misc
Topic: MEMOTECH
Replies: 15
Views: 248

MEMOTECH

What would be the legality of reproducing MEMOTECH peripherals? Reverse engineering the old boards. Reproducing AL or plastic extrusions for cases. And selling at cost? or profit?
by gammaray
Tue Oct 10, 2017 2:57 pm
Forum: Hardware
Topic: Memotech Memopak 32k
Replies: 11
Views: 252

Re: Memotech Memopak 32k

Looks like maybe all is needed is 4 pole dip-switch, chips (from another 16k, 32k?), some caps List: classiccmp Subject: Re: OKI M3732L-20RS ram datasheet? From: Chris Elmquist <chrise () pobox ! com> Date: 2008-12-03 13:22:59 Message-ID: 20081203132259.GJ5784 () n0jcf ! net [Download message RAW] O...
by gammaray
Sat Oct 07, 2017 9:27 pm
Forum: Hardware
Topic: ZX81 rebuild
Replies: 36
Views: 806

Re: ZX81 rebuild

Just a note. Ferranti does not manufacture a PNP complement to the ZTX313 for use in a "WHYWAIT" circuit. That I could find anyway. Personally, I love the ZXmore and ZXblast and modifying a Zeddy-bear but would like to see a new OEM-style ZX81 PCB V.4 made that includes some of these transparent add...