-
Fuse 1.1.1 releasedOn behalf of the Fuse team, I am pleased to announce the 1.1.1 release of Fuse. The changes from the recent 1.1.0 are relatively minor, mostly correc…
... is part of the ULA and the ULA is contended.
ULA+ ports...[/QUOTE]
Well ... emulation it was possible to test the HAM8x1 mode in software ... -
48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…
... if it works) and could test if that combination with the ... to pin 36 of the ULA and the other to pin ... -
48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…
The ULA needs to have address pins ... 74LS00 or 74LS08 to the ULA pins 36 and 37, and ... core wire to link the ULA pin to the PCB track ... a copy of the schematic, test on resistance every PCB track ... shorts caused by solder splashes, test between each and every pin ... -
48k Spectrum ULA issue?Hi All, Have a couple of Spectrums Plus' with their orignal ULAs showing the failure as in screen 2 on the left. [URL="http://hardware.speccy.org/i…
... (move the known good ULA to the poorly machine and ... move the suspect ULA to the known good ... , it is a defective ULA. If the fault does ...
After this test, put the good ULA back in the working ... your two faulty Spectrums to test with, you can still ... -
Spectrum Plus display issueHi, does anyone know if this is fixable at all by someone with no experience? From looking on a similar post on World of Spectrum forum they mention…
...
- Faulty ROM
- Faulty ULA
- Faulty upper RAM interfering ... with communications between CPU/ROM/ULA.
Faulty upper RAM ... on electronics and some basic test equipment. Otherwise, I recommend you ... -
Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
This is why my test ROM displays the ULA inputs at the top ... Multiface button, I saw the ULA square had two white vertical ... ). Sure enough in the RAM test pattern for the upper RAM ... glad it wasn't the ULA... I only have a few ... -
New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... rather hard without the right test equipment.
In ... order of the test gear that is most useful ... br />
Putting general test gear to one side, the ... diagnostic tool is a test ROM. Easiest is to ... RAM test program. If the Spectrum has a working ULA and ... -
New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
[QUOTE=1024MAK;770825]What test equipment do you have?
test equipment.
In order ... of the test gear that is most useful ... only socketed chip is the ULA then?
[ ... />
Yes only the ULA is socketed. -
Spectrum 128 malfunctioning with DIVMMCI recently got myself a spectrum 128 (toastrack) and a DIVMMC card so I could load games from it. It all works fine until it has warmed up and then t…
... 't ever used it to test capacitor outputs before so I ... also try a known good ULA in the machine next week ... -
128+ grey screen faultneed help diagnosing this picture,this is not my machine but a picture found online but this is exactly what i found on this +2grey i just picked up.…
... -meter.do you know if ula/cpu etc from a +2a ... i have i could borrow test chips from other than my ... -
128+ grey screen faultneed help diagnosing this picture,this is not my machine but a picture found online but this is exactly what i found on this +2grey i just picked up.…
... -meter.do you know if ula/cpu etc from a +2a ... i have i could borrow test chips from other than my ... use a [I]Ferranti [/I]ULA. But the Z80 CPU can ... EPROM chips that have a test routine.
[I][B ... -
Spectrum+ keyboard issueHi I have a spectrum+ (issue 4s board) where the 1-5 keys do not work. I have replaced the membrane and checked for continuity. I have also tested …
... , the input buffer in the ULA (which is addressed using A0 ... you may want to check / test these, but as the rest ... .
Try a resistance test between Address line A11 and ... -
Spectrum 128 malfunctioning with DIVMMCI recently got myself a spectrum 128 (toastrack) and a DIVMMC card so I could load games from it. It all works fine until it has warmed up and then t…
... voltage regulator followed by the ULA. Other chips such as the ... ?[/B][/U]
First, test the voltage of the PSU ... , use a heatsink on the ULA. Most of the chip as ... -
48K keyboard issue48K issue 3b reads keys without... keyboard. Looking at recorded keys, problems seems to be with one data line - D1. It happens after a while since p…
All keys match D1 line. Yes, machine has faulty upper RAM, but here D5 line seems to be always high. Pretty strange :confused: I will test ULA in working ZX, if ok, then replace DRAM. -
ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…
... approximation of what a distorted ULA clock output may be like ... a Sinclair 128k + "toastrack" to test with). NONE of the waveforms ... -
Microdrive-Microdrive incompatibility?Hi All! Finally I could get enough Microdrives and connecting blocks (or cable replacement) to make the largest storage configuration of the classic…
... the drives could read the test cartridge reliably, when I connected ... will check the board and ULA revisions. -
Microdrive-Microdrive incompatibility?Hi All! Finally I could get enough Microdrives and connecting blocks (or cable replacement) to make the largest storage configuration of the classic…
... boards were ISS3, all the ULA were FERRANTI 2G007E type. The ... ULA production dates of the first ... probably not related to the ULA production/version...
I ... . There is a good signal test program for Sinclair QL, which ... -
Why is the scene less participative now? or at least, a bit hollow...I have found out in the last months, that despite of having a huge number of new games with a huge quality, a great number of hardware projects, and …
... Chris Smith reverse engineered the ULA and found he had enough ... Fuse that enabled me to test the palette editor I'd ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... micro tapes :-)
Any hardware test that I should do before ... read about:
> Some ULA chips in Interface 1's ... -
Issue 3B no soundI just noticed that there's no sound in the Issue 3B Speccy that I've been fixing. Is it more likely that the speaker is bust or is it TR7 and D9? …
... /> - Remove TR7 and test with the diode test function of your multimeter ... out, then try swapping the ULA with one from a known ... -
Test screens for ZX PrismNot sure that this is *really* the right section for this request, but it's relating to new hardware I'm developing so let's start it off here - a mo…
... reference... As stated before, the "ULA" sees the VRAM as 4x8K ... /> Each data read by the "ULA" reads 32 bits of data ... used. The data required to test if a pixel is 'paper ... -
Crowdfunding ULAs?Hi everybody, I've found someone who's willing and able to make another production run of the Plessey ULA6C001E-7. We're not talking small amounts …
... production run of the old ULA. This fellow I'm speaking ... to redesign or even re-test anything (apart from quality control ... a replacement chip for the ULA. Nothing fancy, nothing extra, nothing ... in, identical replacement for their ULA in case theirs goes kaput. -
Crowdfunding ULAs?Hi everybody, I've found someone who's willing and able to make another production run of the Plessey ULA6C001E-7. We're not talking small amounts …
... Approach to rebuild the ULA but I guess the effort ... production run of the old ULA. This fellow I'm ... to redesign or even re-test anything (apart from quality ... an exact rebuild of the ULA today you need to ... . Do we have the test specification? I guess testing ... -
ZXDS 1.3.0Hello, I am really glad I can announce one more [URL="http://zxds.raxoft.cz"]ZXDS release[/URL] on this special day. The major new feature is the lo…
... the best support for the ULA+ ?
Some time ... of emulators to test the new ULA+ palette, and ... snapshot ) and then whatever ULA+ palette you prefer, without ... I downloaded a dozen of ULA+ palettes and I had ... 'm surprised that the ULA+ support in ZXDS doesn ... -
ZXDS 1.3.0Hello, I am really glad I can announce one more [URL="http://zxds.raxoft.cz"]ZXDS release[/URL] on this special day. The major new feature is the lo…
... the best support for the ULA+ ?
Some time ... of emulators to test the new ULA+ palette, and ... snapshot ) and then whatever ULA+ palette you prefer, without ... I downloaded a dozen of ULA+ palettes and I had ... 'm surprised that the ULA+ support in ZXDS doesn ... -
Crowdfunding ULAs?Hi everybody, I've found someone who's willing and able to make another production run of the Plessey ULA6C001E-7. We're not talking small amounts …
... production run of the old ULA. This fellow I'm speaking ... to redesign or even re-test anything (apart from quality control ... to make the 6000 series ULA are long obsolete, I would ... process that made the original ULA. I could be wrong of ... -
New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... ROM are okay, and the ULA is at least partly working ... we can't currently fully test it).
[B][I ... -
Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
... 48K PCB as is to test.)
There's no ... functionality is handled by the ULA. It wouldn't be common ... -
Heatsink's for ZX SpectrumAre heatsinks usefull for the chips are used in ZX Spectrum's On eBay I saw some heatsinks for ULA's, 3 for +/- 8 dollar's. And I want to know are th…
... difference, although the test is performed on a ZX81 ULA.
ULA-Heatsink-Extend-Life-ULA-Pack-3-Heatsinks ... -
Ben Heck modifies a Zee X Spectrum.Gahh, one of the differences between Americans and Europeans right there in the title. Anyway, we know better ;) ...and this isn't about that anyway.…
... a Spectrum? Is it the ULA that's the real soul ... 's conduct a Turing-like test: take two computers: a original ... : loading games, running demos or ULA tests, plug in devices, etc ...
