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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 ... -
ULA schematicsHi everyone. Some while ago I remember getting hold of some circuit schematics of the innards of the Speccy 48K ULA. Sadly I've since lost the files…
... innards of the Speccy 48K ULA. Sadly I've since lost ... -
ULA?Just curious, what does ULA stand for - I'm guessing Ultra Large (Gate) Array?
Just curious, what does ULA stand for - I'm guessing Ultra Large (Gate) Array? -
The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... is controlled.
The ULA controls output to the the ... need to change the ROM,ULA and add more RAM ?? or ... -
sound input causing dead ula in +2 ?I have a dead +2a (it shows static black screen, no border see: [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=9619&forum=4)"]http:/…
... /> I started to think why ula suddenly broke. 'Deadth' posted ... connected tape leads can damage ula.
Also found ... 1b652469b2ff16c9?lnk=st&q=ula&rnum=18#1b652469b2ff16c9"]http ... 1b652469b2ff16c9?lnk=st&q=ula&rnum=18#1b652469b2ff16c9[/ ... -
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...
Thank -
UlaI 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…
... want to know is the ULA the same from issue 3 ... -
ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... and CAS generated from ULA? I think there may ... Ramsoft incorrectly states that ULA doesn't stop CPU ... [LIST=1]
[*]The ULA address drivers do not open ... I'm curious what exactly ULA is doing then.
... reading from it by ULA. The address while bytefetch ... -
Serching for ZX printer ULA and ZX interface I ULAIs there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is ca…
Is there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is causing the problem.
Is there anyone who can help? -
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 ;)
Anyway, the machine with ULA replacement doesn't quite boot ... -
ULA Book - Target Audience?This is probably of most intrerest to hardware chaps, but a greater community input would be good. I've been turning all my ULA analysis into a love…
... been turning all my ULA analysis into a lovely ... "The Sinclair ZX Spectrum ULA". I'm doing this ... time as creating a complete ULA replacement, so effort is ... features of the machine the ULA encapsulates.
Do I ... the specifics of the ULA internals, it's going ... -
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…
... as well as a replacement ULA for an issue 3 ZX ... Spectrum (Ferranti ULA from memory). Can anyone help ... -
ULA Replacement WORKS !Hi chaps. Lots of activity over the last couple of weeks, and _finally_ we have [B]a working ULA replacement[/B] !! The analogue components such …
... we have [B]a working ULA replacement[/B] !!
The ... -
Inside the ULAI've recently updated my Blog with the news that I've managed to get inside a 6C001E ULA and have got close up images of the die. I'm currently back-…
... to get inside a 6C001E ULA and have got close up ... -
Spectrum ULA Book AnnouncementFurther to getting inside the ULA, I've turned my ramblings and lab book into a more professional book that you can all own! I'm putting a lot of ef…
Further to getting inside the ULA, I've turned my ramblings ... -
ZX81 ULA 2C210E wantedHello, I'm in need of a working 2C210E (not the earlier 2C184E) ULA chip used on zx81s and Timex1000s. These were sold on ebay for 9 quid each some …
... 2C210E (not the earlier 2C184E) ULA chip used on zx81s and ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... perfectly if I cooled the ULA (with cooling spray). The first ... measuring the signals of the ULA I found out that the ... the RAS pin of the ULA. Finally I placed a 180pF ... ) even if I heated the ULA with a hair dryer.
ULA gets so hot, it is cracked open!Hi everyone. I have bought a rubber-keyed 48K and the seller said he was selling it as "for spares/repair." Sure enough, it turns out it doesn't work…
... took it apart suspecting the ULA was dead. It turned ... I immediately noticed that the ULA had a crack in the ... this time and the ULA started to get so ... gut feeling that replacing the ULA wouldn't fix the ...
What might make an ULA get sooo hot that it ...MicroDrive ULA replacement - best way?I have a mirodrive playing up, odd motor sound, sometimes it reads ok sometimes not. Just wondering if its worth replacing the ULA in it, and whats …
... if its worth replacing the ULA in it, and whats the ... a look. I have a ULA chip about the place.
ULA Schematics CompleteHi all. Just a note to say that I have finally produced some readable schematics for the 48K ULA :-) I've also uploaded a few pages from the book -…
... readable schematics for the 48K ULA :-)
I've also ...Where: ZX Printer ULA's and ZX interface I ULA'sIs there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX S…
Is there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX Spectrum ULA, but I have never seen these anywhere?ULA Hacks?During some of my madder experiments back in the 80's I discovered some interesting ULA hacks such as being able to read the raster position through …
... 's I discovered some interesting ULA hacks such as being able ... because I knew that the ULA kept changing and I would ...Can ULA kill other componentsIn my search for a problem I used a ULA6C001E-7 on a board that had a ULA6C00IE-6 chip. Q1) Should this have worked? Q2) After this experiment both …
ULA Plus and Interlace.May be a bit late to suggest this, but here goes. Did the original Speccy ULA actually output a proper PAL interlaced image, with timing pulses on a…
... />
Did the original Speccy ULA actually output a proper PAL ... frame?
Now, does ULA Plus generate a proper interlaced ...ULA Price Poll - You get to chooseIt is difficult to set the price of the book. If it is too low I will undersell my efforts, too high and I overcharge. So choose what you would be w…
... content not only documents the ULA circuit, but also full details ... of the Ferranti ULA range, images of the 6C001 ... ULA internals, both optical and scanning ... technology that was the Ferranti ULA, or the principles and techniques ...ULA equivalent?Gives it an ULA equivalent for the ZX 48K? Or not because the ULA is a custom chip. Micky
Gives it an ULA equivalent for the ZX 48K? Or not because the ULA is a custom chip.
MickyEarliest 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…
... mission to find the earliest ULA datecode. Ie, when the first ... batch of ULA's were manufactured.
ULA - and Sinclair may have in ... />
The earliest issue 1 ULA datecode I have is 8217 ...
