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Interesting/Unusual ZX81Hello I am shopping for a ZX81 and while I was browsing Ebay today, I came across one that is described as "having a 64K chip." When I saw the ad t…
I got the issue 3 I mentioned earlier for ?15 ( ... -
Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…
... -590840, (Issue 3)
011-809283, (Issue 3B)
016-883193, (Issue 3B)
Issue 3B)
028-130891, (Issue 3)
045-345552, (Issue 3B)
S01-035639, (Issue 4S) -
VERY loud beeper!!I recently replaced a dead beeper with another from an old set of headphones, only this is MUCH louder! Is there a way of bringing the volume down a …
... according to my diagrams the Issue 2 board speaker is driven ... power at the speaker. The issue 3 board use a ZTX 450 ... not sure about the other issue boards and will have to ... -
VERY loud beeper!!I recently replaced a dead beeper with another from an old set of headphones, only this is MUCH louder! Is there a way of bringing the volume down a …
The issue 5 and issue 6 schematics show TR7 collector ... the +9V rail.
Issue 3 and issue 4 schematics show TR7 collector ... it, I will check an issue 3 board that I have.
HORACE MINER 2Hi folks, Horace Miner 2 is now available. Please use a 48K Spectrum to run this. [url]http://stevebroad.x10.bz/spectrum/download/HoraceMiner2rele…
... ;773693]I use Spectaculator with issue 3 keyboard.[/QUOTE]
A ...Official Basinc thread - Bug reports and other discussionI just released a new BASin fork, basinc. The first official release was V16r2, and today it's r3. it's uploaded to wos archive and alternatively, h…
... prototype ULAplus board in an issue 3 Spectrum. And thanks to Karingal ...Composite video mod on +2 grey: same as 48k?Hello all, Sorry for the n00b question but I couldn't find an answer yet... I did a composite video mod for the 48k in the past. Now I got a 128k +…
... possible on a +2 grey issue 3?
Or would he need ...Composite video mod on +2 grey: same as 48k?Hello all, Sorry for the n00b question but I couldn't find an answer yet... I did a composite video mod for the 48k in the past. Now I got a 128k +…
... possible on a +2 grey issue 3?
Or would he need ...Strange ZX81 PCBHello I took apart my non-working ZX81 to attempt to fix it and I noticed that the resistors and diodes were soldered a bit strange. The wires are c…
Hmm.. I can only think that it was an assembly error in a small batch of boards that caused this.
Those boards are issue 3, and to my knowledge only issue 1 ZX81 boards were offered in kit form.
BNever saw that before on a black +2Today I opened a freshly arrived black +2. First I was amazed not to see an Astec HF modulator, then I spotted the "Issue two". So far I always found…
... /> I've never seen an ISSUE 3 in any of the photos ... [I]do [/I]have an ISSUE 3 Z70833 can I [B]please ...Spectrum rubber key memory upgradeIf a 16k spectrum has a 32k fox upgrade kit installed anyone any idea what board revision we would be expecting to find in this machine? And was this…
... needs touching.
Only issue 3 boards and up have the ... to be used in an issue 2.
BX=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
... .0) (tried with both the "Issue 2 Keyboard" setting ticked and ... in SpecEmu (with either Issue 2 or Issue 3 keyboard selected) so I ... whether this is a Fuse issue or something else. I will ... . Some sort of subtle timing issue, or floating bus ...X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
... .0) (tried with both the "Issue 2 Keyboard" setting ticked and ... in SpecEmu (with either Issue 2 or Issue 3 keyboard selected) so I ... whether this is a Fuse issue or something else. I will ...X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
... .0) (tried with both the "Issue 2 Keyboard" setting ticked and ... in SpecEmu (with either Issue 2 or Issue 3 keyboard selected) so I ... whether this is a Fuse issue or something else. I will ... sort of subtle timing issue, or floating bus issue maybe?[/QUOTE]
The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... , the -6 was used in Issue 3 boards, so what was the ... got it running in my Issue 3 48K here, but it's ... wrong. I suspect a timing issue, perhaps what they fixed in ...ZX Spectrum 48K Issue 3, loss of -5V rail.Hi all, I've googled this problem and poured over the electrical diagrams for the circuitry concerning the power supplies and I believe I know what …
... /Technical/Hardware/ZXSpectrumIssue3-Layout.php"]issue 3 here[/URL]
This ...ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…
... issues running it on an Issue 4 board, I think they ... play nicely with even an Issue 3... I'd recommend using a ...The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... 6C001E chips, because in my Issue 2 it gives a good ... [i]not[/i] like my Issue 3 (not 3B) - if I try ... section.
Running my 16K Issue 2 with a Cheetah 32K ... at the end of the Issue 2's life? Has anyone ...The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... [i]not[/i] like my Issue 3 (not 3B)... Running my 16K ... Issue 2 with a Cheetah 32K ... at the end of the Issue 2's life?[/quote]
issue 2 but not your issue 3, and providing you're sure the issue 3 ... short run prior to the issue 3's release.The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... any other issues in this Issue 3, and the -6 and -7 ... it's a perfectly normal Issue 3.
Has anyone ever ... they were made for the Issue 3s and found incompatible, it ... , what happened to -1, -2, -3 and -4...? Maybe the -5 ...The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... 8324. Another site lists an issue 3 with a 6C001E-6 datecode ... spectrum serialnumber database lists an issue 2 spectrum with a 6C001E ...The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... production. I have a 5C112E-3 here with 8314 datecode that ... made until 8324 when the Issue 3 first came out, and they ...Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... to crack on with the Issue One again.
Following ... other news, I resurrected an Issue 3 from the dead today... CPU ...Replacing Rubber Key Membrane 48k - IssueHi, I've replaced the membrane on my 48k rubbber keyboard. When I have the top and bottom loose, but wired up , all keys work fine. When I place t…
... worked - although yours is an issue 3 motherboard - it should have a ...The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... think it was a yield issue on the -5, more the ... didn't work with Issue 3 machines. After all, Issue 3 prototypes will have ... , so you would still get Issue 2 machines with the new ...The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... or -5) was made for Issue 3 boards.
...
Sinclair made the Issue 3 board when they had a ... well under way when Issue 3 boards were made. The ... tweaks in the Issue 3 video circuit are the ... other major tweak in Issue 3 is the position of ...The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... ULAs as well as the Issue 3 board.
In other words ... a 6C001E ULA in an Issue 2 board, it's [i ... the 5C112, and the 5C112E-3 is better than the -2 ... is better than the 5C112E-3...
So many questions ...5v reg replacementHi all, Have been playing with one of my Issue 2 Spectrums and decided to replace the 5v regulator & heatsink with this wee switching reg I had lyin…
Yes, I think I have one of those SR10S05's lying around also.......muct give it a go on one of my Issue 3's.
Thanks for heads up.
Ian.
