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The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…
... no avail. I get the ULA snow, sure thing, but that ... -
New colour palette for 16K/48K/+ machines, based on ULA YUV voltagesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA. This colour palette …
... ’s book The ZX Spectrum ULA.
This colour palette ... use the original Sinclair Ferranti ULA, 5C102E, 5C112E or 6C001E. It ... -
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] -
where can i get ula's from?i want a nebula ula from retroleum but they have sold out. i also googled it and had a look on ebay and i cant even find any normal ula's either.
i want a nebula ula from retroleum but they have sold out. i also googled it and had a look on ebay and i cant even find any normal ula's either. -
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 …
... 2 with a 5C112E-2 ULA. Just had to replace ... maybe a problem in the ULA could cause b) or ... great book "The ZX Spectrum ULA: How to design a ... br /> Patrick
My ULA Y output:
[img]https ... ://i.postimg.cc/HxDsHvPC/ULA-Y.jpg[/img]
... -
48K Issue 3B slowly fading over 15-20 seconds, capacitor gets hot.Hi folks, Recently my much-modified* RAM testing 48K board failed with a hot/burny smell so I turned it off quickly for looking at later. Thinking…
... 48K board failed with a hot/burny smell so I turned ... marked on the pic gets hot. That cap and the diodes ... -
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…
... to swap a 6C001E-6 ULA type with a 5C112E ?
ULA.
Diagnostic ROM doesn't ... would like to swap the ULA and Z80 to narrow the ... like to try swapping the ULA as I have another working ... -
The ZX Spectrum ULA bookFound a copy of the ZX Spectrum ULA book by Chris Smith that I've never read. This is a new book that was given to me years ago and I've never got ro…
... copy of the ZX Spectrum ULA book by Chris Smith that ... -
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 .. -
48k ULA heat sink required ?ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ? i wonder if anybody has done any …
ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ?
i wonder if anybody has done any before & after heat tests ? -
Interface 1 ULAIs there a technical description of the functionality of the Interface 1 ULA, similar to the "The ZX Spectrum ULA" book? Specifically, what is the…
... functionality of the Interface 1 ULA, similar to the "The ZX ... Spectrum ULA" book?
Specifically, what ... the ROMEN lines of the ULA? Superficially, ROMCS feeds into the ... -
Using a thermal camera to fix speccy's.Hi All, Thought I'd share another repair... Got a board that collapsed the bench supply straight away ( I run a bench supply and give it just enou…
... 16 K ram chips. The ULA can be seen below them ... spot isn't all that hot in reality ( I can't ... 8 4116 IC's are hot. That's what's dropping ... I pull one of the hot ones out, and sure enough ... -
spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…
... ULA chip, after touching it for about 5-7seconds gets really HOT ... , almost to hot to touch. Is this ... would try to get another ULA chip.
The motherboard is ... can be replaced including the ULA. -
spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…
Not very normal for me, the ULA can be a little hot but not realy too much, and can do it after a few minutes, not seconds. The question is where you can find another ULA? The only answer I know is other damaged spectrum. -
speccy 128kI have a spectrum 128k that seems to work fine and load games ok. When I power it on for the first time I get the usual options screen, no problem. B…
The ULA chip seems to get a little hot in the middle of ... warm but also not extremely hot.
All the chips on ... -
Help! +3 won't work anymore!I've just set up my old +3 and it just won't work - it used to a few months ago but now it won't :( I'm in need of some expert help so here's the pr…
... the modulator - thing about the ULA is that even when it ... (gets very hot).
If it IS the ULA, you may ... changing/sourcing the surface mount ULA isn't gonna be easy ... -
Help with +3 in comaHi everyone Had a spectrum +3 under the bed for some time and when replacing its drive i accidentally connected the 5v and the gnd of the led. Now…
... that the TEA chip gets hot immediately after powering on. Also ... (i think) but not as hot and fast as the TEA ... hope that its not the ULA that is behind all this ... post about soldering a new ula and i could give it ... my hands on a +3 ula somehow or is there a ... -
Faulty ZX Spectrum 48kHi Guys, Been sorting through my rubber keyed 48k machines lately and decided to buy some new keyboard membranes for them. I replaced the membrane …
... !
Just changed the ULA from another Spec and has ... to be rather on the hot side.
Fingers crossed ... -
my dodgy speccys.hi people, i was wondering if i could engage some opinions / thoughts / ideas of anyone, regarding my current "fixing up" of my speccys, since you s…
... voltage regulator may get very hot if this is the case ... , so see how hot the Speccy is getting. If ... that, you'll fry the ULA - expensive job.....
Anything ... -
Spectrum won't load data when warmI've got an interesting observation. I put iPodLinux onto my iPod and got TZX files playing back as the proper audio waveform. I also removed the vol…
... the lid off, the ULA gets so hot that I can't ... -
Spectrum won't load data when warmI've got an interesting observation. I put iPodLinux onto my iPod and got TZX files playing back as the proper audio waveform. I also removed the vol…
... the lid off, the ULA gets so hot that I can't ... ?[/QUOTE]
Not exactly. ULA warms, but not so much ... -
Spectrum won't load data when warmI've got an interesting observation. I put iPodLinux onto my iPod and got TZX files playing back as the proper audio waveform. I also removed the vol…
ULA chip does run hot, but it shouldn't burn ... />
It's surprising how hot they do run, but if ... -
Spectrum won't load data when warmI've got an interesting observation. I put iPodLinux onto my iPod and got TZX files playing back as the proper audio waveform. I also removed the vol…
[QUOTE=DEATH]ULA chip does run hot, but it shouldn't burn ... />
It's surprising how hot they do run, but if ... 15mins+) then it's very hot to the touch. We're ... not quite talking PC GPU hot, but it's enough ... br />
btw, is the ULA from a 128K machine the ... -
Nooooo my speccy died!??!!Hi! I am quite sad. :( Tonight I got a kempston interface so I rushed home to try it on my spectrum+ The edge connector of the interface was narrower…
... them, always changed the ULA then checked the voltages ... are present, change the ULA and test the computer ... the cause being a damaged ULA. Unlikely but possible.
... find one or two getting hot - replace these. Not ... broken chips will get hot though, in fact, ... -
Did I killed my Speccy ???Hi guys, 1 minute ago I was working on my 128 +2A... But I made a mistake : I cut the gound on the PSU plug of the computer, and I forgot to resolde…
... RAM chips mnore than likely. Hot chips are highly indicitave of ... you've taken out the ULA chip too, in which case ... a replacement part for that ULA and you certainly won't ... - if not, chances are the ULA has gone to silicon heaven ... -
Did I killed my Speccy ???Hi guys, 1 minute ago I was working on my 128 +2A... But I made a mistake : I cut the gound on the PSU plug of the computer, and I forgot to resolde…
... chips mnore than likely. Hot chips are highly indicitave of ... you've taken out the ULA chip too, in which ... a replacement part for that ULA and you certainly won' ... if not, chances are the ULA has gone to silicon heaven ... I didn't fried the ULA...
I'm going ... -
Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…
... />
Glue logic and ULA - throw away the analogue side ... required in the ULA. (Any documentation on the ULA's internals?) Perhaps ... biggest obstacle for recreating the ULA in relatively few gates ... the heatsinkless voltage regulator hot) and very, very cool ... -
Help make Retro Gamer greatI'm more than happy with the articles that are now appearing in Retro Gamer, but I want it to become far more of a hub for the retro community than i…
... have confirmed how the spectrum ULA snow effect work - lots ... is normal, but the ULA wasn't designed to get ... effect occurs. Hot air rising from the ULA meets the membranes ... , falling back to the ULA as snow. This can ... snow falls and causes the ULA to "short out", ... -
Help make Retro Gamer greatI'm more than happy with the articles that are now appearing in Retro Gamer, but I want it to become far more of a hub for the retro community than i…
@Dunny - Them pics are Tefaltastic! I'm so glad someone got that reference! The ULA snow effect is cool. I wonder how that is emulated? I don't remember installing a small fan to blow hot air around in my keyboard or anything... -
Help make Retro Gamer greatI'm more than happy with the articles that are now appearing in Retro Gamer, but I want it to become far more of a hub for the retro community than i…
... someone got that reference! The ULA snow effect is cool. I ... a small fan to blow hot air around in my keyboard ...
