Search found 1512 matches

by Paul
Mon Nov 05, 2012 7:57 am
Forum: Hardware
Topic: Are there any ZX80/81 Gerber PCB files available?
Replies: 6
Views: 3643

Re: Are there any ZX80/81 Gerber PCB files available?

I have the 3d print from shapeways (from the german forum) and it really is impessive. In case the 3D Printer is too small it might be made in several pieces and put together. The problem at shapeways is the price. About the gerber files: ask Martin http://www.8bity.cz/zx80-replika/ He used an older...
by Paul
Sat Nov 03, 2012 3:08 pm
Forum: Hardware
Topic: 16K RAM Pack Schematic / Chip Layout
Replies: 71
Views: 47806

Re: 16K RAM Pack Schematic / Chip Layout

Hi Mark. Thank you very much about this detailed instruction. Up to now I had not bothered repairing my faulty 16K RAMpacks. But with this help even I might be able to get it done. I think I will give a try within the next weeks. Specially what to desolder in order to do easy measurement on the rema...
by Paul
Wed Oct 31, 2012 1:47 pm
Forum: Emulators
Topic: Testing Z80 Emulation...
Replies: 13
Views: 9620

Re: Testing Z80 Emulation...

If you download tasm there is a testfile with every mnemonic included and you can compare the outputs to tasm.
by Paul
Sun Oct 28, 2012 4:31 pm
Forum: Development
Topic: Recommendations on a test platform
Replies: 2
Views: 1491

Re: Recommendations on a test platform

Using an ULA may make option two possible. I know several zx81s that are made on pcb by wiring standard ttl. They have in common that they are not maintainable. Andy's ula makes this much better. Andy uses an issue one board glued on a piece of wood with a replacement membrane attached to the wood. ...
by Paul
Fri Oct 12, 2012 12:44 pm
Forum: Development
Topic: ZX81CCP video output for ZX81
Replies: 116
Views: 69154

Re: ZX81CCP video output for ZX81

Thanks for testing.
So it was a false alarm. Better to often than never.
Downloading will then have to wait until I am home.
by Paul
Fri Oct 12, 2012 7:03 am
Forum: Development
Topic: ZX81CCP video output for ZX81
Replies: 116
Views: 69154

Re: ZX81CCP video output for ZX81

I have no idea wether this is true or not, but our scanner won't let the File thru. @Pokemon, could be please verify? Es wurde eine Datei übertragen, die einen Virus enthält und daher von McAfee Web Gateway geblockt wird. Name des Virus: McAfeeGW: Heuristic.BehavesLike.Exploit.CodeExec.O URL: http:/...
by Paul
Tue Oct 09, 2012 11:04 am
Forum: Development
Topic: New tek-demo from Bodo (max hires)
Replies: 4
Views: 3602

Re: New tek-demo from B0D0 (max hires)

Static stuff, but as usual impressive Not static at all. You need to read the manual ;) Shift-5 to Shift-8 moves the screen around. In case it gets ilegible (your monitor not liking the position) Shift-0 restores to the initial coordinates :D The default position was evalutated to fit into the ZX20...
by Paul
Thu Oct 04, 2012 12:01 am
Forum: Development
Topic: Improved FAST mode display...???
Replies: 44
Views: 29166

Re: Improved FAST mode display...???

In my mobile phone i can reach his Page without problems (from the Netherlands if this helps)
I am sent here
by Paul
Mon Oct 01, 2012 7:58 pm
Forum: Development
Topic: NEW (PAPER) MAGAZINE ABOUT ZX-81 (free :) )
Replies: 161
Views: 75092

Re: NEW (PAPER) MAGAZINE ABOUT ZX-81 (free :) )

I forgot to mention. Mine came on Saturday. Thank you very very much!
I like it very much.
by Paul
Fri Sep 28, 2012 7:59 am
Forum: ZX BASIC
Topic: Need for speed - the ROM-patches
Replies: 55
Views: 43325

Re: Need for speed - the ROM-patches

To run at 20Mhz, the ROM is copied to RAM and then RAM occupies the 0-8K At the moment I am (still) experimenting with the STK16C88 Auto Store 32K RAM which is 25ns fast. It is in my (extended, zero insertion force) ROM Socket. I want to do banking as well and when in 0-8K its write Protected, if i...