-
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 ... -
Spectrum kaput! HELP!Hi! I've had a Speccy since 1988. The only problem is that it went dead 6 years ago! ...Or atleast it seems to have.If I switch it on now, all I get…
... to read the copyright message, ULA, processor, ROM and the first ... -
WANTED: tape replacement for +2?Any tape replacement possible for a +2? My +2 works wonderfully but the incorporated datacorder is simply worn out and won't load ANYTHING. Dirty sig…
... 2 machine.
The ULA chip uses the same pin ... on pin 28 of the ULA chip after the OUT, ... #FE are always one. The ULA with the lower 16K of ... of the Z80 and the ULA are connected by small resistors ... write the lower 16K, the ULA halts the processor if it ... -
Didaktik M (ZX Spectrum clone selling)Here is an offer to buy ZX Spectrum clone ( DIDAKTIK M ) from Slovakia, basic info: 100% functionality, Kempston & Sinclair joysticks connectors, tap…
Didaktik M (ZX Spectrum clone selling)Here is an offer to buy ZX Spectrum clone ( DIDAKTIK M ) from Slovakia, basic info: 100% functionality, Kempston & Sinclair joysticks connectors, tap…
... has an russian clone of ULA that has different timing, so ...Didaktik M (ZX Spectrum clone selling)Here is an offer to buy ZX Spectrum clone ( DIDAKTIK M ) from Slovakia, basic info: 100% functionality, Kempston & Sinclair joysticks connectors, tap…
... with Speccy due to different ula timing and other small differences ...Where are you from / who are you / do you still use the real SpectrumJust three questions to see how divers the Spectrumworld is and how many users are still around. If you want to stay anonymous, just answer the last …
1. Messina, on the island of Sicily (Mediterranean Sea), which happens to be part of the Italian Republic.
2. Alessandro Grussu
3. I would use my rubber keyed 48K every now and then, hadn't I shorted the ULA out :(speccy 128kI have a spectrum 128k that seems to work fine and load games ok. When I power it on for the first time I get the usual options screen, no problem. B…
I think the problem is caused by a component overheated. The ULA is the first candidate, so you can check the chip looking for excesive heat.
[ This Message was edited by: Carlos on 2002-03-05 03:51 ]Emulator_designHi guys, can anyone direct me to some links which explain how to write ZXSpectrum emulators. Thanks in advance.
... not fundamentally difficult and enough ULA emulation to get the screen ...Emulator_designHi guys, can anyone direct me to some links which explain how to write ZXSpectrum emulators. Thanks in advance.
... (or imagination) was at the ULA side. Yes, I can imagine ... but the problem is the ULA. I think, I can figure ... ?
(like a good Z80-ULA interaction document).
Am I ...Emulator_designHi guys, can anyone direct me to some links which explain how to write ZXSpectrum emulators. Thanks in advance.
... publicly available information about the ULA-Z80 interaction. There are certain ...what is the best..............hi there, could anyone tell me what is the best emulater as I no longer have a spectrum but would really like to get hold of an emulator but which on…
... glaring bugs in the z80/ULA emulation at the moment, such ...ANN: Spectaculator 2.5 available for downloadHi. I've just released a new version of Spectaculator, available from [url="http://www.spectaculator.com/"]http://www.spectaculator.com/[/url]. Hopef…
... down to the 4 Ts ULA frequency. It would be perfect ... had all of the exact ULA details but we don't ...ANN: Spectaculator 2.5 available for downloadHi. I've just released a new version of Spectaculator, available from [url="http://www.spectaculator.com/"]http://www.spectaculator.com/[/url]. Hopef…
... Woody's blazingly fast ASM ULA renderer - it renders using only ...Replacement power suppliesIs it possible to get a replacement power supply for the old speccys? The high Amperage is a problem: 1.4A for the rubber-keyed 48K. Know where you c…
The Amperage isn't the problem.
Ferranti, who made the ULA said "don't use more than 75% of circuits in this chip." then Sinclair said "we'll use around 90% of the ULA" and the beautiful machine has had heat dispersion problems ever since.What is a Kempston joystick?Just a quick question from an ignorant Commodore user (what, a Commodore user on this sacred ground? Relax, I'm a fan of all 8-bits, including the wo…
... ) as its attached to the ULA.
239 (0x00ef) and ... partially decoded, just like the ULA is on every even port ...Whats wrong with my spectrum 48 kWhen i startup, instead of copyright messsage i get gray screen with black square in middle.
Mostly it is the ROM or ULA.
It can happen when you disconnect an interface without disconnecting power first.Whats wrong with my spectrum 48 kWhen i startup, instead of copyright messsage i get gray screen with black square in middle.
The ULA is making the picture. I'd suspect the ram is faulty.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 …
... to make one without a ULA? Or will you just steal ... spectrum, but I think the ULA does so much for it ...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 …
... Spectrum memory layout) and ULA.
ULA will also be provided for ...Speccy +2 RGB to S-video?Okay, so I emigrated from dear old Blighty to a land rather less Speccy-friendly, the USA. I've finally managed to get a couple of Speccies over here…
... from the Video Chip and ULA and wire them to some ... chip and Y off the ULA
The only downside ...
