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ZX Interface 1 Compatability<p>I wondered if anyone knows of any compatibility problems between the ZX interface 1 and certain Issues of the Spectrum motherboard?</p><p>I just p…
... on my rubber key Issue 2 but not on Issue 3 Spec+. Is ... any known compatibility problem with Issue 3 motherboards and the IF1 ... likely to be preventing the Spectrum from recognizing a known working ... -
48k issuesThe 48k speccy had several alterations ( issues) and I was wondering, they all seam to work ok so what was the point?<br>
... of some of the new issue boards.
Including all ... drove the change from issue 1 to issue 2. Allowing a wider range ... 7805 regulator (better larger heatsink) drove the change from issue 2 to issue 3 ... . The changes for issue 4, 5 ... -
ULAAre ULA's (for Spectrum 48k's) interchangeable through the different issues? To give some background, to work out what was wrong with an old speccy I…
... Spectrum 48K ULA:
- 5C102E: Original ULA, found on Issue ... 1 and early Issue 2 boards. Have a ... in machines containing this ULA (Issue 2 boards).
- 6C001E-6: ... s excellent book, "The ZX Spectrum ULA".
B -
External Z80 CPUHi Looking for some advice if possible. Many years ago I had a plug-in board for a Spectrum 48k which had a couple of switches, a z80 CPU, and a S…
I ended up just copying the clock circuit from an issue 2 board (simply because I had the bits to hand), using a ZTX313. Now working fine - just need to find a spectrum with a dodgy CPU to test it on in real life! -
Fixing Spectrum Display ProblemsI've been searching the forums and cannot find a definitive list of things to check/do. Would somebody be so kind as to list the troubleshooting step…
The advice rather depends on which version of the ZX Spectrum is causing problems.
Sorting out a 16k issue 1, or a 16k/48k issue 2 is rather different to sorting out a RGB problem on a +2B...
[b][i]Mark[/i][/b] -
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…
... the top right )
ISSUE ONE (only one transistor over ... board: sinclair 1982 (SPECTRUM) SRC 077 B ISSUE ONE SPECTRUM
near ... all in grey: (c) 1982 ISSUE ... sinclair soldered, the word spectrum in gray and 2 wires
< ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... " with my almost totally stripped Issue 2 ZX Spectrum board . Joules says it ... any damage to potentially valuable Spectrum heritage stuff or waste anyone ... 's time.
2 I could concentrate on "What ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... not happen to a Spectrum especially an Issue 2![URL=http://s827.photobucket ... .com/user/harriusherbartio/media/Spectrum% ... photobucket.com/albums/zz200/harriusherbartio/Spectrum%20Boards%20Dec%202015%20007_zpswrr1avyx. ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... pic above of a pillaged Issue 2 ZX Spectrum 48k
... it . I am not a Spectrum "Christmas Compo philanthropist" but ... of buying a half decent Issue 2 ZX Spectrum I would estimate to ... ? Well , I think , the Issue 2 ULAs , I believe , are pretty ... -
Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…
... above, when ZX Spectrum hasn't even output ... were sent by the ZX Spectrum!
... br />
[code]Issue 2 schematic
C5 1uF ceramic ... permitting)
Issue 3B schematic
C5 ... mainly tried stuff on an issue 2).
... -
Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…
... watched Zorn's excellent "ZX Spectrum Initial Tests" video and my ... Spectrum passes all of those tests ... great YouTube channel. Your ZX Spectrum videos are just excellent and ... but the Spectrum is actually not an issue 2 but an issue 3. I ... -
Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…
... but the Spectrum is actually not an issue 2 but an issue 3. I ... -
Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…
... anything like that on a Spectrum PCB but again I am ... RAM upgrade kit, intended for issue 2 Spectrums. It'll work fine ... -
Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…
... have been intended for the issue 2, because that has a simpler ... but, would it hurt the Spectrum further if I remove the ... upper RAM failure if the Spectrum initializes and works as a ... -
Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…
... , and to be honest, an issue 3 16K machine is quite ... to be found on an Issue 2 board.
As Zorn ... the output of the 7805 regulator? You mention that the -5 ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... is my second ZX Spectrum Issue 2 :(there is another Issue 2 pic- on this ... they question is :- How many Issue 2s will I need to ... have a good and working Issue 2 " . It might be a lot ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... /> I *think* that the only spectrum tinplate I've removed (using ... have these.[/quote]Snap. The issue 3 machine from BITD did ... , but they are either issue 2 or 3) are the same.< ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
Re "Made up" Issue 2 ZX Spectrum
The board arrived ... -
Knight Lore disassemblyHi, Not quite sure if this belongs here or in "Games" but figured it's more likely that developers would be interested. I've just released the …
... , there's a bit of Spectrum-specific code that I don ... only if you care about Issue 2 or 3 machines. -
slightly different question - how long ago did you pack away the speccy ?if at all ;) personally I think I was about 19 when it, and all the games, went into storage - SNES and PCs etc took over. I'm 32 now, and only in …
... not pack away my 48K Spectrum - it died, slowly and painfully ... 10 exemplars: 1x16K, 1x48K issue 2, 1x48K issue 3 with composite modification, 1x48K ... , 1x128K Investronica, 1x128K UK, 1x+2, 2x+2A, 1x+3.
How R@RE was the 16k Speccy?I'm curious about the ratio of 16K to 48K models sold - the 16K seems to be a pretty rare beast these days. All the people I knew who had 16K Speccys…
... (in the case of the issue 1 board, a plug in ... -Sinclair one). And for the issue 2 onwards, for most machines, it ... notice how many "upgrade you Spectrum" adverts there were in the ...Opus Discovery with a HarlequinHi all I am getting a Harlequin and the 128k toaster rack mod but I have an opus discovery and a spectrum +, the + is dead so going to use the cas…
... Spectrum.
Most Harlequins that I have seen use a switching regulator ...Non working issue 3BGuys Hope you can help me here (or maybe, someonene from Europe could take a look at it? I've already tried different ULA, CPU, ROM and low RAM (…
... speaker in the issue 2 board. So only the issue 1 board used ... then in a normal working Spectrum, it's not normally left ...New WoS logo pollAs discussed elsewhere, here is the poll for the new WoS logo. The mods will choose from the top 5 choices. I am sure that I will be inundated wi…
... .com/albums/1003/dave_c4/zx-spectrum/wos-logo_key_175x50_e2_zpsqaddp9f4.png[/img]
Issue 1/2. I had a grey key Issue 2. But it ... , and the top of my Issue 2 got lost years ago.Anything valuable / rare in this lot?Hi all Been going through the cupboards here and discovered my old Spectrum tapes collection. Wondered if any of it had any real value? Happy to…
...
Batman
Spectrum Golf
Spectrum Horizons
Horace Goes ... /> Spectrum Special 1
Spectrum Special 2
Spectrum Special 3
Spectrum Music
Spectrum ... Jan 91
Your Sinclair Issue 81
Overlander
...Magazines - Dutch speakers/readers requiredHello, all.. The magazine project continues, and I THINK I may have found a mistake with one of the folders on WoS? Unfortunately, the magazines …
... three folders of Het Computerblad SPECTRUM have the date hand- ... The double number is volume/issue, which gives:
Volume ... October 1989
Volume 5 Issue 2 March 1990
In ... achterstand ingelopen." - "This combined issue catches up with the backlog ...Heat-sinking the spectrum 48+ :| [URL=http://s1063.photobucket.com/user/JRT480/media/Fotografia1988_zps5egnygdp.jpg.html][IMG]http://i1063.photobucket.com/albums/t515/JRT480/…
... /> I'm not sure the Spectrum ULA needs a heatsink, on ... 1980's I left my issue 3 Spectrum on for days at ... says, replace the 7805 voltage regulator with a Recom or similar ... modern switch mode regulator. That will reduce the heat ...Heat-sinking the spectrum 48+ :| [URL=http://s1063.photobucket.com/user/JRT480/media/Fotografia1988_zps5egnygdp.jpg.html][IMG]http://i1063.photobucket.com/albums/t515/JRT480/…
... preserve the membrane, fit a switching regulator and let the chips breath ... inside the case of the spectrum + and I have already determined ...Reproduction Issue 1 grey keymats - yay or nay?A discussion is live on the Spectrum 4 Ever FB group regarding whether it's a good idea to have replacement grey keymats for Issue 1 Spectrums produc…
... care. I have an uncased issue 1 board. Apart from having ... ), it works just like a issue 2 board (of which I have ... can you replace on a Spectrum before it gains a Trigger ... 's not exactly an original Spectrum anymore, is it?
Was it all Yellow?I've got this vague memory of my mates first, early 16k model ZX Spectrum. Am I correct in thinking the the white (Paper 7 / Bright 0) had a slight y…
... first, early 16k model ZX Spectrum. Am I correct in thinking ... later models?[/quote]
Issue 1 and issue 2 boards needed the colour ... .
The circuitry on issue 3 (and later) boards was ...
