-
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…
... of CLK on the ULA, but the ULA's I'm using ... .
Working back from the ULA I tested and changes the ... -
ULA+Does the ULA+ have to be on before writing a palette? In the examples I've seen, they all enable the ULA+ before writing the palette. Maybe I sh…
Does the ULA+ have to be on before ... seen, they all enable the ULA+ before writing the palette.
ZX 81 / TIMEX TC1000 2C210E ULA'sHi, up for sale: 11x tested 2C210E ULA's, for the ZX Spectrum ZX81 or Timex TC1000. Asking price £29 shipping included to EUROPE, £33 for the …
... :
11x tested 2C210E ULA's, for the ZX Spectrum ...In-game Screen FlickeringHi folks, today while playing 'Beyond the Ice Palace' I noticed strange behavior of my Issue 6a Spectrum+. When I pressed '2' (for UP) + 'O' (for …
... />
2WOP+SPACE is my typical key setup in every game ... 'm not aware of RAM faults at the moment. I don ...ZX Spectrum 48k ULAlooking for a ZX Spectrum 48k ULA Thanks Phil
looking for a ZX Spectrum 48k ULA
Thanks
PhilDonald TrumpThis is going to be a political decision, which rarely end well, so let's all try to stay calm (even me), and show the mods that these topics can sta…
... majority of American people. A typical politician, basically. But Trump was ... the desire to hide his faults, unlike most politicians. You could ...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.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 …
... sound.
I tested the ULA on another Spectrum and works ... from pin 28 ULA to emitter of TR7 no faults. TR7 tested ...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 ...Major +2A problemI've found that my +2A doesn't seem to be working anymore - I just get some black and white horizontal bars on screen, sometimes with some random cha…
... the screen the processor and ula and some ram must be ... have fixed a few +2A faults.
Fraser ...Can somebody help me with this?One of my "friends" shoved a piece of metal into the back of my spectrum (48k RAM) and now whenever I try to use it theres nothing but weird lines an…
... ICs I'm afraid - the ULA is generally quite easy to ... /> as far as general memory faults - I find the upper 8 ... /> if you're lucky, the ULA & Z80 will be socketed ... the ULA and Z80 are ok, my money says the faults in ...Is there anyway of fixing my spectrum?Hi people, i have just got my pride and joy back out of the closet (48k +) and turned it on and to my horror the arial socket is not working properly…
... spectrum's old modulator. A typical workaround would be to use ... it's likely that the ULA, the CPU or the memory ...Another Spectrum +2 Fault (actually two of them :-)Just picked up a couple of +2s from a boot sale - both *much* better condition than my one - obviously had far less use ;) One was sold as fully wor…
... ? Does it go via the ULA? If not, then it looks ... the tape deck and the ULA have gone :(
I ... twice under warranty with datacorder faults. Looks like these were a ...Whats wrong with my spectrum 48 kWhen i startup, instead of copyright messsage i get gray screen with black square in middle.
... are usually ULA related - RAM faults almost always show up as ... very very rare a faulty ULA will make no 'picture' at ...Whats wrong with my spectrum 48 kWhen i startup, instead of copyright messsage i get gray screen with black square in middle.
... wrote:
faults like that are usually ULA related - RAM faults almost always ... very very rare a faulty ULA will make no 'picture' at ... is that it is a ULA related problem...? Is that something ...OopsToday is a sad day :confused: Poor old rubber keys has gone t**s up. :( All i get is a black screen with a white border. Any body got any ideas …
... ?
--
commonest faults are failure of the -5v ... 4116 RAM (lower 16k), faulty ULA, faulty upper RAM (4532 32k ... is most likely a faulty ULA.
don't bin ...Ecstasy & AgonyWhile checking out the area around Chennai Central station on Sunday, I came across this crowded narrow road taken up entirely by roadside vendors se…
the ULA is always a suspect because ... fixed far more with these faults than ULA/ROM/CPU put together.broken ZX SpectrumHi there I was given a dead ZX Spectrum years ago, and being bored today thought I'd try it again. Its a Sinclair ZX Spectrum with lovely rubbery key…
... the lower memory block, the ULA - in fact, it could be ... of you to examine, diagnosing faults is almost impossible.128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…
... processor shares them with the ULA. This reduces the speed of ... />
An example of a typical bank switch on the 128 ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... is not intended for your typical peripheral, but for pressing issues ...
On the Spectrum, the ULA generates a maskable interrupt at ... not straightforward however. The ULA was not designed to work ... ), (I*256+256) the ULA interrupt will cause our subroutine ...One emulator feature it would be good to haveI'd like to see emulators (and SCR-to-proper-bitmap-format converters) have a config option for colours: "Realistic" or "Bright". The trouble with b…
... video generation section of the ULA, but I wouldn't be ... other colours? Or that a typical CRT scales the gun drives ...Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …
... .3mm tip.
The ULA chip should be based (in ... seen one without a based ULA chip. Possible somebody has been ... /> You can't really diagnose faults on a Spectrum just by ... . There are one or two faults that show up, true - but ...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…
... /RAM/Z80 are all possible faults with your Spectrum.
ULA. Then take voltage readings to ...
