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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…
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Serial: 001-62176
ULA : 5C102 8217
CPU : NECD780C-1 ... little PCB (later version of issue one)
R34 - 15R ( ... later version of issue one)
[ ... com/itm/Sinclair-ZX-Spectrum-Issue-One-Grey-Fawn-keys-Dead ... -
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…
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NUMBER COLOUR MEMORY ISSUE ULA DATECODE Z80 DATECODE COMMENTS
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…
... list, all the issue 2 machines have issue 1 ULA's, and one ... of the Issue 1's ... has an issue 3 (or above) ULA (clearly ...
NUMBER COLOUR MEMORY ISSUE ULA DATECODE Z80 DATECODE COMMENTS
Earliest ULA datecode ??I'm on a mission to find the earliest ULA datecode. Ie, when the first batch of ULA's were manufactured. The earliest picture of the Spectrum circu…
... , maybe it was delays in ULA production that caused the initial ... />
[CODE]NUMBER COLOUR MEMORY ISSUE ULA DATECODE Z80 DATECODE COMMENTS
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…
I'll do all mine as soon as I can. Must have about 15 or so now. Is it just the number and colour or do I need to open them and get the PCB issue, ULA type etc?.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…
... them and get the PCB issue, ULA type etc?.[/QUOTE]
at ...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…
48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…
... minor differences between different issue ULA's. The later ULA's are backwards ... compatible. The earlier ULA's are not recommended to ... try the good known working ULA in the faulty Spectrum ... way of testing the ULA.
ULA's are normally ...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…
... second tape??)
48k Issue 4S
ULA: 6C001E-7
CPU ... -352855 (in red) Suspected memory issue, ULA working, orig PSU.
48k ... Issue 4A
ULA: 6C001E-7 8502
Wanted: RGB SCART cable for heatsink 128K and ULA for issue 3 ZX SpectrumHi all, I'm after an RGB SCART cable for a heatsink 128K as well as a replacement ULA for an issue 3 ZX Spectrum (Ferranti ULA from memory). Can an…
... a replacement ULA for an issue 3 ZX Spectrum (Ferranti ULA from memory ...ZX 48K issue 4a with ULA 5?I got a ZX 48K PCB. It works but it has a ULA 5. I thought on the issue 4a is a ULA 6 or later. Micky
I got a ZX 48K PCB. It works but it has a ULA 5. I thought on the issue 4a is a ULA 6 or later.
Micky48 Issue 3b working but very hot ula and cpuSalve to everybody I bought from e*ay an Issue 3b 48k , fitted in a + case. Fixed the keyboard problem with a new keyboard membrane from good Rwap (w…
... bought from e*ay an Issue 3b 48k , fitted in a ... characters. BUT I noticed that Ula is very hot and the ... for fetishism I added to Ula and Z80 two mini heatsinks ...Which ULA for which issue?Which ULA is for which issue? Is there a standard? Micky
Which ULA is for which issue? Is there a standard?
MickyCan anyone test my Issue 2 ULA?Hi guys, Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know whether I have…
Hi guys,
Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know whether I have a faulty ULA or not before trying to source one from somewhere.WANTED: ULA chip for Issue two SpectrumHello, I fired up my Issue Two ZX Spectrum a couple of weeks ago, and it seems my ULA chip is failing again. Has anyone got a spare working chip the…
Hello,
I fired up my Issue Two ZX Spectrum a couple of weeks ago, and it seems my ULA chip is failing again. Has anyone got a spare working chip they'd be willing to sell? Please PM me if you can help.
Regards,
KamilWhich ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …
... the correct ULA for that board.
All issue one boards ... best operation.
Issue 4A and later boards are ... take anything earlier.
Issue two is the board with ... although this was made after Issue two ceased production. The quick ...Issue 1 oddityHello to everybody, I have a very first under my hands - a broken Issue 1. Apart from the classic "broken lower RAM" syndrome which will be easily t…
... under my hands - a broken Issue 1. Apart from the classic ... shade of blue.
5C102 ULA works. U,V and Y ...Issue 3 ULA ProblemsI've been given an Issue 3 48k to fix. It was producing no video and no picture on the TV. The coil was buzzing so it was getting power and all the v…
I've been given an Issue 3 48k to fix. ... it with a spare ULA from an Issue 4(6C001E-7) ... working keyboard and the same issue with none functioning keys ... the ULA again for one out of a known working Issue ... the wrong tree with the ULA because when dropping the ...No CLK on issue 2 ULA pin 32I'm trying to fix an issue 2. The symptoms are as follows:- Black and white bars on screen, colours near impossible to tune in, although these po…
... 'm trying to fix an issue 2.
The symptoms ... of CLK on the ULA, but the ULA's I'm using ... .
Working back from the ULA I tested and changes the ...doubt about swapping ULA in an issue 2 boardIs it possible to swap a 6C001E-6 ULA type with a 5C112E ? I have this issue 2 board that is not booting, it shows me a black border with horizont…
... -6 ULA type with a 5C112E ?
I have this issue ... suspecting a CPU problem, or ULA.
Diagnostic ROM doesn't ... would like to swap the ULA and Z80 to narrow the ... try swapping the ULA as I have another working issue 2 machine ...Spectrum Issue two problemI managed to bring back to life a issue two spectrum (at least the power supply cirquit). The screen is now crystal clear (after replacing all the el…
... bring back to life a issue two spectrum (at least the ... example.
I changed the ULA with several others to no ...ULA chipHi. Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ? Also looking for one 7805 heatsink... Thank
Hi.
Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ?
Also looking for one 7805 heatsink...
ThankUlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.
I remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board.
It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ?
Thanks.Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…
... to know is the ULA the same from issue 3 to 3B ... that 16k speccys were only issue 1
I have ... an issue 3b mainboard out of a ...Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? I'm doing a lot of research into the ULA and also the reasoning …
... Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA ... that was made to issue 2 machines - the ... have applied to the issue 1 machine, even ... ULA _ever_ go high impedance - this is a memory refresh issue ... /> Tracking down people with Issue 1 or 2 machines is ...Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? You're help is needed! PLEASE SEE THIS THREAD: [url]http://www.…
... Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA ...Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
... gang..
The Speccy 48 ULA Replacement is *almost* here ;)
ULA replacement doesn't quite boot up yet - some timing issue ...Yay. Found an issue 1!I've had a Speccy sitting about the house for a while, unused as it only ran as a 16k (a sticker seal on the casing suggested either a 48k upgrade or…
issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…
Hi All
I got issue 6a pcb from ebay with ... 74ls04 (old one working too), ula working fine - I have 2 ... chips I got from working issue 3b board
any ...issue 4s for reapirHi All, This time I have issue 4s for repair :) Here is few screen shots and small movie after boot. [url]http://forest.no-ip.org/issue4s/[/url] I kn…
... ,
This time I have issue 4s for repair :)
Here ... /[/url]
I know only ula working fine and have good ... .
And what is this issue 4s ? what schematics to look ...
