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6C001EE-7 ULA A ULA ID I haven't seen before, possibly a misprint? Found on an issue 6A board in a rubber key 48k. Any ideas? [img]https://pbs.twimg.com/media…
A ULA ID I haven't seen before, possibly a misprint? Found on an issue 6A board in a rubber key 48k. Any ideas?
[img]https://pbs.twimg.com/media/DbYC8aNXkAANAm4.jpg:large[/img] -
Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…
... on a rubber keyed Speccy(issue 3) that I can't ... missing on the emitter. The ULA was also getting hotter than ... resort I tried swapping the ULA with a known working one ... -
Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …
... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had ... maybe a problem in the ULA could cause b) or ... book "The ZX Spectrum ULA: How to design a ... /> Patrick
My ULA Y output:
[img]https ... ://i.postimg.cc/HxDsHvPC/ULA-Y.jpg[/img]
... -
Help request for an injured Issue 4A spectrumHi folks, I'm hoping to resurrect an issue 4A spectrum that has been in my hoard for a couple of decades since buying it for spares. Someone ha…
... 'm hoping to resurrect an issue 4A spectrum that has been ... /> I also had a damaged 4S, which i've managed to ... -
ZX Spectrum 48K Issue 4B No soundHi, I have a ZX Spectrum 48K Issue 4B without sound. I tested the ULA on another Spectrum and works fine, tested the speaker and it has the correct …
... Spectrum 48K Issue 4B without sound.
I tested the ULA on ... , tested continuity from pin 28 ULA to emitter of TR7 no ... this is ok for an Issue 4B. I checked the diagram ... -
48k issue 4B display problem etchi,, i have a zx spectrum 48k issue 4B with a display issue it has wavy lines in both the border and paper,some colours seem worse than others ie red…
... zx spectrum 48k issue 4B with a display issue it has wavy ... composite mod with the same issue.. i have tried everything short ... ,new lower ram module.different ULA,crystals,full re cap,disabling ... -
zx spectrum ULA upgradei have a issue 2 zx spectrum 16k which i upgraded to 48k .. i believe the ULA is faulty (ULA5C112E-2) .. seems intermittent i know a later one can be…
i have a issue 2 zx spectrum 16k which i upgraded to 48k .. i believe the ULA is faulty (ULA5C112E-2) .. seems intermittent i know a later one can be used but should some resistor values be changed to match it ?
thanks mark .. -
Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... does my real Issue 4A (Zilog Z80 & ULA 6C001E-7)
4S ;-)
Edit: Btw, as ... -
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…
... C.O.M Board Issue UM CPU ULA Notes
003-690957 ... -070821 Rubber Key 48k . Korea 4s . . . Sold Working
001-213087 ... -
Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…
... test. THe one in my 4S issue machine is soldered to PCB ... />
I have removed CPU, ULA, Logic for ram and CPU ... to ULA bus, as well as high ... -
Non-Ferranti ULA 6C001E-7?Hello! I don't like Iss2 boards that much but after revising one Speccy like that for a friend, the results were so positive that I decided to have …
... "workhorses" for many people, unlike Issue 2 machines which were more ... were in use for all Issue 3, 3B and I believe ... 4 and 4S machines.[/QUOTE]
Not ... that issue 4A boards and above require the 6C001E-7 ULA to ... -
Non-Ferranti ULA 6C001E-7?Hello! I don't like Iss2 boards that much but after revising one Speccy like that for a friend, the results were so positive that I decided to have …
... "workhorses" for many people, unlike Issue 2 machines which were more ... were in use for all Issue 3, 3B and I believe ... 4 and 4S machines.[/QUOTE]
Looks like my issue 2 ... has had a ULA swap in the ... -
Non-Ferranti ULA 6C001E-7?Hello! I don't like Iss2 boards that much but after revising one Speccy like that for a friend, the results were so positive that I decided to have …
... short list of known ULA datecodes and types. I ... to it.
[CODE]DATE ULA ISSUE(s)
8214 ... 3
8414 6C001E7 4S
8416 6C001E7 4A ... br /> 8445 6C001E7 4S
8446 6C001E 4S,6A
... ,4B
8816 6C001E7 4S
8821 6C001E7 (PS ... -
Non-Ferranti ULA 6C001E-7?Hello! I don't like Iss2 boards that much but after revising one Speccy like that for a friend, the results were so positive that I decided to have …
... to it.
[CODE]DATE ULA ISSUE(s)
... 3
8414 6C001E7 4S
8416 6C001E7 4A ... br /> 8445 6C001E7 4S
8446 6C001E 4S,6A
... ,4B
8816 6C001E7 4S
8821 6C001E7 (PS ... on boards ranging from issue 2 to 6A.
48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…
... issue between the Z80 and the ROM and/or ULA. Swapping the ULA ... board. However, only the issue 6A now works.
... the 3B and the 4S should crap out on ... on the 4S's -5v. Additionally the 4S sometimes shows ... schematic for the relevant issue board, then check that ...48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…
... u][/i][/b]
"The ULA is mostly functional (it reads ... .1(3b) and 11.85(4S) and -4.9 (3b) ... and -5.15(4s) - for reference the working ... a schematic for the relevant issue board, then check that you ... (polarity) as on some issue boards, there is a screen ...Emulator compatibility with real SpectrumHi emulator programmers... Having spotted for the last 6 months that my iPAQ is still missing a Spectrum emulator I started typing last tuesday - an…
... the z80 for 69888 tstates, issue a z80 interrupt and update ... is slower because of the ULA)?
Or must I ...Crash Issue WantedI'm after a copy of my favourite Crash issue which is Issue 59 - December 1988. I don't need the tape, because I don't have a real Speccy, but would…
... of my favourite Crash issue which is Issue 59 - December 1988.
issue. It was the first one ...Sinclair Gebruiker magazine, Issue 1I picked up this Dutch magazine today (with some other misc Speccy gear...) and it appears to be the first issue, November 1984; printed by "Micro Pr…
... appears to be the first issue, November 1984; printed by "Micro ...ANN: ZXF Issue 2 publishedIssue two of ZXF (free spectrum magazine - PDF format) has now been uploaded and awaits your inspection. The new URL for the site is [url="http://ww…
Issue two of ZXF (free spectrum ... page.
Contents this issue include:
* Eight pages ... attention, work on the Christmas issue will be begining
very ...ZX DIGEST - ISSUE 1 - FINISHED!DEAR SPECCY FRIENDS! Its very simple, to purchase the magazine you need to take a subscription out for 10 euros. For this you will get the following…
... ZX Digest
* Each issue should be about 20 pages ...has anyone converted an early speccy to drive a monitor ?sorry if this is the wrong forum, but there doesn't seem to be a hardware one, per se. I've been looking through the schematics a bit today - it see…
... the main restriction is the ULA - if one from a 128 ... to a factory mod to issue 2 pcbs which actually provided ...ZXF issue three is publishedHello everyone, A festive issue three of ZXF is now awaiting your downloading at [url="http://www.zxf.cjb.net."]www.zxf.cjb.net.[/url] The actual P…
... everyone,
A festive issue three of ZXF is now ... print off.
This issue boasts 40 pages - 4 more ... than last issue - and includes:
* ... received in putting together this issue has been tremendous - the highest ...WANTED: 128k+ or 128k +2(early grey mod.) ULA chipHello, Attempting to repair my 128k+ speccy. Needs a ULA(IC1)chip from either a 128k+ or an early +2 will work also. If anyone has this chip or has a…
... 128k+ speccy.
Needs a ULA(IC1)chip from either a ... 's broken(other than the ULA), please give me a shout ...GSO Issue 3We are very proud to present our best issue yet, issue 3 of GSO. Theres plenty of Spectrum action in this issue too! It can be downloaded by going …
... proud to present our best issue yet, issue 3 of GSO.
issue too!
It can ...retro - edge issue 2ive just managed to grab a copy of the retro edge magazine issue 2 , its excellent , loads of reviews of old classics such as chuckie egg , lords of …
... of the retro edge magazine issue 2 , its excellent , loads of ...Anyone else bought 25th Birthday issue of PC World magazine?today I bought the (APRIL) 25th Birtday Issue of Personal Computer World magazine. There are a few emulators on there, including ZX81 & Spectrum, and…
... bought the (APRIL) 25th Birtday Issue of Personal Computer World magazine ...ZX DIGEST ISSUE 2 - NEARLY FINISHED!HI FOLKS! ZX Digest issue 2 is nearly finished, at the moment it looks like its going to be about 25-30 pages long. We have incorperated many new s…
... FOLKS!
ZX Digest issue 2 is nearly finished, at ... , hence the size of this issue. We are hoping to to ... release issue 2 towards the back end ...ZX DIGEST ISSUE 2 - NEARLY FINISHEDHI FOLKS! ZX Digest issue 2 is nearly finished, at the moment it looks like its going to be about 25-30 pages long. We have incorperated many new s…
... FOLKS!
ZX Digest issue 2 is nearly finished, at ... , hence the size of this issue. We are hoping to to ... release issue 2 towards the back end ...ANN: ZXF issue 4 now publishedIt gives me huge pleasure to announce that issue 4 of ZXF magazine is now available for free download at [url="http://www.zxf.cjb.net."]www.zxf.cjb.n…
... huge pleasure to announce that issue 4 of ZXF magazine is ... doing that :))
This issue features a focus on new ...
