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Spectrumpedia revised and extended edition. Suggestions about possible new contentFor the 40th anniversary of the first launch of the Spectrum, I am going to revise the Spectrumpedia. Feedback was very positive, although the fact t…
... /> Smith, Chris, [i]ZX Spectrum ULA, The: How To Design A ... -
5C Horizontal timing vs 6C horizontal timing.Hi all, Just considering the timing difference in the video signal between the 5C and the 6C where the 6C ULA seems to have 50% longer horizontal …
... the 6C where the 6C ULA seems to have 50% longer ... -
ZEsarUX 10.0ZEsarUX 10.0 is out! Download it from : https://github.com/chernandezba/zesarux/releases/tag/10.0 Changes: Version 10.0 - Clive Sinclair edi…
... window height
Fixed Next ULA Scroll to use registers 0x26 ... -
Picked up a broken Interface 1...It locks up the Spectrum when an Interface 1 command is issued. Anyone want to have a guess as whether it's the ULA or the ROM or something else c…
... as whether it's the ULA or the ROM or something ... -
Spectrum Abuse...Just got some new Spectrums in to repair ( I find it a great way to relieve stress, excepting when I do something daft while fixing them... ) One …
... another... No video, no clock. ULA seems dead, but no video ... what they did to the ULA to stop it working.
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 ...New release of ZEsarUXFound today by chance on: [url]https://github.com/chernandezba/zesarux/releases/tag/10.1-13122021[/url] [quote]ZEsarUX-10.1 Beta1 Pre-release che…
... />
Added setting to change ULA Data bus value
Added ...Building a ZX Spectrum 3B, Looking for PartsAs the title says, I'm attempting to build a new ZX Spectrum, but I'm having some trouble locating all of the parts. Thus far, I've got all of t…
... ICs as well (including the ULA!).
However, the coil ...shamazx dma 15x anyone intereted? was hoping to get ula+ full screen animations working any programmers think they could disect rtype replace screen scrolling…
... intereted? was hoping to get ula+ full screen animations working
shamazx dma15x anyone intereted? was hoping to get ula+ full screen animations working any programmers think they could disect rtype replace screen scrolling w…
... intereted? was hoping to get ula+ full screen animations working
shamazx dma 15x anyone intereted? was hoping to get ula+ full screen animations working any programmers think they could disect rtype replace screen scrolling…
... intereted? was hoping to get ula+ full screen animations working
Click with CliveProud to announce a new release, Click With Clive [url="https://jbizzel.itch.io/click"]https://jbizzel.itch.io/click[/url] I'm also working on …
Proud to announce a new release, Click With Clive
[url="https://jbizzel.itch.io/click"]https://jbizzel.itch.io/click[/url]
I'm also working on a Next version and ULA+ support, that will be part of this release once complete.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 ...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 …
... reading screen data by the ULA and memory regeneration by the ... , the interference of reading ULA screen data and memory regeneration ... those that based on original ULA.
Additionally, ... cycle with the ULA screen drawing cycle, the ULA works normal, ...BEST EMULATOR EVER ?!?somebody already proved many emulators? what is the best emulator?
I've found RealSpec to be quite stable under windoze (even NT!) - It's definitely worth it for the excellent accurate ULA emulation - even if you have to DOS restart.Comcon programmable interfaceRemember this beast, back in 83/84? You used plugs to determine what key each direction on your joystick responded to. It apparently had two fire but…
... with the +2a because the ula overrides. The same is true ...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…
... into the spectrum, maybe the ULA is the component damaged.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…
... /> I did notice that the ULA chip, after touching it for ... 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.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…
Other than accidents the ula usually went first, heat dissapation or the lack it.+2aI have a +2a and it wont boot properly get the white border with black square when first powerd on but then just goes into a black screen instead of …
... ROM
3) Screwed up ULA that can no longer output ...ZX to EGA - it works !!I finally hooked up EGA monitor to ZX. Everybody can repeat if can hold the soldering iron in the arm. The circuit diagram is simple, it contains two…
... , Y directly, S ( mixed , from ULA) connected to Horisontal retrace. Then ...Which emulator and assembler?Hi, I am looking to learn z80 assembly language and I feel the best option is a spectrum emulator and an assembler. Can anybody recommend the best …
... this contended memory and exact ULA stuff... so zx32 may be ...Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…
The major problem with building your own Spectrum is the ULA - it {is,was} a custom chip, and you're obviously going to need one to get a working Speccy!Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…
... guess, but couldn't the ULA be sort of -- well -- emulated ... some additional logic, if the ULA isn't all that weird ... spectrum and take off the ula.Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…
Looking at the ULA from the circuit diagram it ... /> I did look for the ULA but as you say - no ...Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…
Hmm... its just a thought, but maybe u gould gather some ULA chips(and other functional pits and parts) from speccys that are otherwize disfunctional. Ppl oughto have some laying around garages and stuff.Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…
I have seen a Spectrum-clone from the USSR or was it Rumania??? Whatever...
It had the entire memory and ULA-handling in only one chip. So there are
alternatives for the ULA. ALthough the snow-effect with the I-reg was no longer....Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…
... of what's in the ULA - Video/TV generator, I/O ...Original rubber key 48k'sThis question is to some point academic; But i seem to remeber the original 48k Rubber Keys Speccy came in versions 1,2 & 3! (way back when, occasi…
... low-powered version of the ULA was employed. Even so, a ... continues " The change in the ULA on the Mark 3`s ... bit now floats until the ULA has warmed up, and no ...
