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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]
... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... the following:
Spectrum 128 Toastrack
Spectrum +2 Grey ... greatly appreciated.
[b]ULA heatsinks[/b]
As the ... a heatsink to the the ULA without needing to desocket it ... 'll need to pull the ULA out of the +2 in ... -
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 .. -
Harlequin 128 Rev 2D with ZX Interface 1 RS232Hi, Does anyone have any experience of using serial interface on ZX Interface 1 plugged into a Harlequin 128. While microdrive works fine, i can't…
... 1 plugged into a Harlequin 128. While microdrive works fine, i ... -
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 ... -
Built a ZX Spectrum that works, but can't get the upper RAM to work?Like the title says I finished my Spectrum 3B board, and it boots, but it doesn't see the upper 32k of RAM. When it boots, the lower 16k works f…
... my oscilloscope (on both the ULA and CPU), however, the voltage ... swap, PRINT PEEK 23733 returns 128 instead of 255 (or 127 ... -
Exact emulation of the Snow effectAs the original post on another forum is outdated, and for those who don't know about that forum, I duplicate this info here: At the beginning of …
... conditions, the interference of reading ULA screen data and memory regeneration ... snow effect: at 16/48/128/+2 machines snow appears if ... are addresses #4000..#7FFF, for 128/+2 these are also addresses ... turned out that on some 128 machines the snow effect leads ... -
My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... ports
>ZX Spectrum 128 GPU
>ZX Spectrum ... 128 DSP
>2 heatsinks ... /> GPU? Are you using the ULA or not? If you're ... -
Fake screenshots? No - now it's REAL screenshotsOk then. A few weeks ago I said I will show You the new gfx-mode of Speccy and - here it is: [url="http://republika.pl/hooy_prg/hprg.zip"]http://rep…
... TAP into RealSpectrumEmulator, and use ULA FX Hardware Multicolour to display ... work hopefully even better on 128. i explain my idea at ... -
Is spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …
The 'snow bug' in the ULA is present in all models ... present on a toast rack 128.
Cheers,
Is spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …
... some letters repeat as the ULA got confused)
(Woody ... reproduce this even with 'emulate ULA snow' turned on?)
128 didn't crash in any ...Loading programs directly via SoundblasterLet's just hope this does not sound too silly (I'm a newcomer)... Is is possible to connect a real Spectrum's MIC port to the audio out port of a Sou…
... loading on my toast rack 128.
We could do ... the input impedance of the ULA pin is). This means the ... a lot louder at the ULA input pin (about 50% of ...Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??
... much better if the original 128 had the ability to page ... ]
RAM, Z80 and ULA have got to be the ...PROBS : Building a Spectrum +2 into a custom caseHi guys, I’m rebuilding my Spectrum +2 into a new case at the mo (an Acorn A410 case to be precise). I’ve got the motherboard in which h…
... both main Spectrums: 128+ with +D and ULA Fixer in a mini ...CHROME: a new ZX model! :)Probably You know already about 'last days news', but well... ;) Such informations are so important that I'll put it here: here is a news about n…
... is the ULA emulated - is timing compatible with the 128, Pentagon, is ...new programmer needs information hi , i have been learning c++ for a while and am trying to make games using windows but being 28 and nostalgic , i thought it would be fun try and f…
... has only one custom chip: ULA, and it is responsible for ... if you have a Spectrum 128, the memory banks are paged ...COVOX works?My Sprinter "simulates" a COVOX soundcard at port 4Fh, but I don't know how to use it! Can anyone explain to me the process of programming it? (To be…
... .. or to say it better: ULA provide one bit D/A ... ....
covox:
write 128 to port where is covox ...Emulation accuracy and how it affects softwareHi folks. I was thinking of bodging together a rudimentary Spectrum emulator myself, not as a competitor to the other emulators, but as an integrate…
If anybody knows demo or game for original Spectrum48 or 128 (+2, +3 also accepted) with effect similar to Rage demo for Pentagon? Or ULA did not allow output border with 1 TState (2 pixels) accuracy?If you could re-design the Spectrum...Let's suppose you could go back in time to the beginning of the Eighties. The Spectrum is being designed as the revolutionary successor to the alread…
... a 100 percent compatible spectrun 128, with Timex emulated.
[/quote ... 've still got the Timex ULA, with the difference that implies ...Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…
... designing and developing the Spectrum 128 to create a super-cheap ... /> - Kempston interface built-in.
- ULA developed by Texas Instruments (not ...Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…
... of designing the ZX Spectrum 128. They claimed that as they ... developed the 128 hand to hand with Sinclair ... be easily modified. Also, the ULA was vastly enhaced, and developed ... which is divided for the ULA and the CPU.
Necessary +2A ROMsA +3 has 4 roms: Menu/Editor Syntax Checker +3DOS 48k BASIC I understand that a +2A is identical to a +3 but without a disk drive. It also uses …
... is not present in normal 128's (and grey +2). With ... get the dreadfull "rain" (or "ula snow" as some call it ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... tried changing your Z80 or ULA or anything? Either of those ... know why my Spectrum 128+ has an AMSTRAD ULA...? How long did ... Amstrad make Spectrum 128+s for ...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 …
... to include the Timex SCLD (ULA) in the portable Speccy. This ... left it out of the 128.
[/quote]
I ... on the radar when the 128 came out. A former Timex ... cars and the Z88. The 128 was mainly designed in Spain ...
