ZX Spectrum (and ZX81) ULA gallery

Updated: 23 Feb 2020

I decided to create this ULA gallery to give people a look at the timeline of probably the most important part of the ZX Spectrum (and ZX81).
It’s in chronological order that should give the best impression.

I will update this list with photos you guys send me: send your ULA photos to: ula@bytedelight.com.
And if you are able to dig into these details (but if not, please send me just your ULA photos!), please add info like:

  • what board it’s in
  • general temperature after 15 minutes (outside case)
  • hotspot temperature after 15 minutes (outside case)
  • other technical details

More webpages about the ZX Spectrum ULA:

There are probably errors on this page. If you find any, please let me know: ula@bytedelight.com.

(C) 2017 Ben Versteeg – ask me for distribution of content of this page please.

The Inconvenient Truth – dying ULAs


Well, if you’re using the machine with that ULA anyway.

After 35 years, the ZX Spectrum ULA has had a long and interesting life, and during the last 5-10 years it seems more and more ULA chips are passing away.
The main cause is heat! Check out this video: https://www.youtube.com/watch?v=bY8dnEl-V7k

The ONLY proper solution to extend the life of an original ULA chip is to put a heatsink on it with the size of the chip itself.
The ones that many people use is the Fischer Elektronik ICK 40 B, which can be obtained from eg. Reichelt , Conrad or somewhere else.
You need thermal paste and add glue to mount the heatsink, or use thermal glue.

There are a couple of ULA replacements nowadays, but if you can save your original ULA chip, please make sure to do so.
Otherwise they will wind up like these… RIP 🙁

My ULA died!! 🙁

No sweat!

Get a replica ULA like:

ZX81:

ZX Spectrum 16/48K:

ZX Spectrum 128K:

 

And now for the real gallery…

8102 ZX81 ULA

23 Jan 2020 From Brendan Alford: “Have an 8102 ULA, you won’t see any earlier 🙂”

8102 ZX81 ULA

24 Jan 2020 From Ian Gledhill: “Here’s some more. The earliest [ed: this one], a middle period one (but UK made so L@@K R@RE) and the latest ULAs known.”

8109 ZX81 ULA

22 Jan 2020 Stuart Cowan beat everyone so far 😉 He sent in a pic ̶o̶f̶ ̶t̶h̶e̶ ̶o̶l̶d̶e̶s̶t̶ ̶(̶Z̶X̶8̶1̶)̶ ̶U̶L̶A̶ ̶s̶o̶ ̶f̶a̶r̶: “Something for your gallery”

8119 ZX81 ULA

22 Jan 2020 From Idriz Delic: “ZX81 issue 1”

8120 ZX81 ULA

23 Jan 2020 From Thomas Ahn Kolbeck: “From ZX81 Issue 1”

8146 ZX81 Ferranti ULA 2C184E

26 Jan 2020 from Stephen Bennett: “A couple of early ones… including one of the 8102s :)” (original photo includedn a 8102 obviously)

8150 ZX81 ULA

24 Jan 2020 From Chris Bellman: “Wow, 8150 is the earliest I have.”

8214 Ferranti ULA 5C102E

21 Jan 2020 From Mark Smith: “You need a pic of the first ula batch – 8214. Note the lack of a cockroach on this machine (it doesn’t have a serial number either, but used to belong to Eric Deeson who wrote for Your Computer magazine among others). Hence machine code games don’t work on this one :)”

8217 Ferranti ULA 5C102E

From Brendan Alford (22-12-17)

Inside an issue 1, s/n001-011754

8220 Ferranti ULA 5C102E

From Chris Taylor (3 April 19)

Found inside an Plus case (unfortunately).
Still very lovely!

8229 Ferranti ULA 5C102E

From Mark Smith (22-12-17)

8233 ZX81 ULA 2C210E

24 Jan 2020 From Ian Gledhill: “Here’s some more. The earliest, a middle period one [ed: this one] (but UK made so L@@K R@RE) and the latest ULAs known.”

8237 Ferranti ULA 5C112E

From Stephen Bennett (22-12-17): “This is mine – Issue 2, rubbey key, S/N D01-004070”

8237 Ferranti ULA 5C112E

From Luis Correia: “And some more. These are all the ula I have outside my spectrums. From my 30year plus collection”

8244 Ferranti ULA 5C112E-2

From Ian Gledhill (07-01-18) – “One from the vaults”

8245 Ferranti ULA 2C201E

4 Feb 2020 from Thomas Ahn Kolbeck Kjær Heckmann: “Another one from me ULA 8245 from ZX81 issue 3”

8250 Ferranti ULA 2C210E (ZX81)

From Luis Correia: “And some more. These are all the ula I have outside my spectrums. From my 30year plus collection”

8301 Ferranti ULA 5C112E

From Brendan Alford (27-12-17)

Bottom:

8304  Ferranti ULA 5C112E-3

24 Jan 2020 From Chris Bellman: “8304 from a 16k spectrum issue 2 for your gallery”

8310 Ferranti ULA 2C210E

10 March 2020 From Miguel Capelo: “I have about 30(!) of these ULA still in their anti-static IC tubes! I’ve found them together with new rubber keyboards for the Timex Sinclair 1500 in a box on a warehouse. The guy told me that they came from Timex Portugal factory, so I belive these are New Old Stock never used on the assembly line.”

8312 Ferranti ULA 6C011E

From Ian Gledhill (07-01-18) – “6C011E made in the UK. This is an NTSC ULA roughly equivalent to a 6C001E-6, but gives a 60Hz video signal instead of 50Hz”

8312 Ferranti ULA 5C112E-3

From Ian Gledhill (07-01-18) – “5C112E-3 made in the UK”

8314 Ferranti ULA 5C112E-3

From Mark Smith (22-12-17)

8319 Ferranti ULA 5C112E-3

From Ben Versteeg (22-12-17)

8320 Ferranti ULA 6C001E-5

From Ben Versteeg (22-12-17)

8320 Ferrantu ULA 5C112E-3

From Sebastian Lambinon (16 March 2020): “Saw you have a collection of these. Not sure if you care for any more, but here you go 😉”
Yes we do care for more!

8322 Ferranti ULA 6C001E-5

From Ian Gledhill (07-01-18) – “Philippines 6C001E-5 with tall font.”

8324 Ferranti ULA 6C001E-5

From Ian Gledhill (07-01-18) – “Probably made in the Philippines again, marked 6C00IE-S instead of 6C001E-5”

8326 Ferranti ULA 6C001E-5

From Mark Smith (22-12-17)

8328 Ferranti ULA 6C001-6

From Ian Gledhill (07-01-18) – “Wide, squared font 6C001E-6, again probably Philippines”

8332 Ferranti ULA 6C001E-6

From Ian Gledhill (07-01-18) – “6C001E-6 made in the UK (much more reliable than the Suicide ULA, which is the -6 made in the Philippines)”

8334 Ferranti ULA 6C001E-6

From Ben Versteeg (05-01-18)

8335 Ferranti ULA 6C001E-6

From Ian Gledhill (07-01-18) – “Philippines 6C001E-6 with squared font”

8339 Ferranti ULA 6C001E-6

From Ben Versteeg (22-12-17)

8345 Ferranti ULA 6C001E-6

From Mark Smith (22-12-17)

8406 Ferranti ULA 6C001E-7

From Luis Correia (20-1-2020)

8410 Ferranti ULA 6C001E-6

From Ben Versteeg (22-12-17)

8410 Ferranti ULA 6C001-7

From Thomas Kolbeck Kjær Heckmann (22-12-17)
Inside a Issue 4B S/N 037-269574

8410 Ferranti ULA 6C001E-7

From Ben Versteeg (22-12-17)

8411 Ferranti ULA 6C001E-7

From Ian Gledhill (07-01-18) – “Wide print 6C001E-7, probably made in the Philippines”

8412 Ferranti ULA 6C001E-6

From Ben Versteeg (05-01-18)

8418 Ferranti ULA 6C001E-7

22 Jan 2020 From Milan Sreckovic: “Nice piece of 8418”

8420 Ferranti ULA 6C001E-7

From Mark Smith (22-12-17)

8438 Ferranti ULA 6C001E-7

From Luis Correia: “And some more. These are all the ula I have outside my spectrums. From my 30year plus collection”

8439 ZX81 ULA 2C210E

24 Jan 2020 From Ian Gledhill: “Here’s some more. The earliest], a middle period one (but UK made so L@@K R@RE) and the latest ULAs known. [ed: this one]”

8442 Ferranti ULA 6C001E-7

10 Feb 2020 From João Ventura: “Found this ULA to add to your collection. 8442 6C001E-7 no logo. It’s from a 48K+ issue 6A.”

 

8444 Ferranti ULA 6C001E-7

From Mark Smith (22-12-17)

8446 Ferranti ULA 6C001E(-6)

From Ben Versteeg (22-12-17)

8446 Ferranti ULA 6C001E(-6)

From Ben Versteeg (22-12-17)

8447 Ferranti ULA 6C001E-7

From Bernhard (19-01-20) –
“I´ve attached Photo of 48k ULA FERRANTI ULA 6C001E-7 8447 which I can´t find on yet your „ZX Spectrum ULA gallery“.
It was on a Issue 4 S Board.
As I only have the naked, untested board here.”

8448 Ferranti ULA 6C001E-7

From Ian Gledhill (07-01-18) – “Square font 6C001E-7. Philippines again?”

8448 Ferranti ULA 6C001E-7

From Luis Correia (20-1-2020)

8519 Ferranti ULA 6C001E-7

21 Jan 2020 From Rui F Ribeiro: “48K Issue 3, 1983” (machine where it is in).
Andy Shepherd replied: “date stamp is 1985, guess it got replaced at some point?”
Rui F Ribeiro replied: “Probably. This 48K had repairs and a new Z80 from Zilog replacing the original NEC one.”

8608 Ferranti ULA7K010E5

From Stephan Evans (21-01-18)

This is the ULA for a ZX Spectrum 128K or (grey) +2.

8623 Ferranti ULA 6C001E-7

From Brendan Alford (27-12-17)

8625 Ferranti ULA 6C001E-7

From Brendan Alford (27-12-17)

8629 Ferranti ULA 6C001E-7

From Ben Versteeg (22-12-17)

8720 Ferranti ULA6C001E-7

From Brendan Alford (27-12-17)

Brendan said: “I think the 8720 ULA is the last batch produced by Ferranti prior to the Plessey takeover”.

8816 Plessey ULA 6C001E-7

From Brendan Alford (27-12-17)

8822 Plessey ULA6C001E-7

From Ben Versteeg (22-12-17)

I got this info from Ian Gledhill about Plessey:

This one seems to spread the heat quite well: average temperature is about 39 degrees Celsius and 41 at the hotspot outside a case.

8936 PS ULA6C001E7

From Brendan Alford (27-12-17)

8936 Plessey ULA 6C001E7

From Ian Gledhill (07-01-18) – “Plessey 6C001E-7 with logo. UK made?”