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Memory upgradeHi! I bought a 16K rubber key Spectrum. It's said in the box and memory test program also said it's 16K machine. Strange thing is that there is yell…
... also 4 empty sockets between ULA and Z80.
My question ... -
How looks a Spectrum shown in a TFT VGA monitor?Some people has just asked me if a cheap Dealextreme VGA Box is capable of showing a decent picture from a ZX Spectrum. Well, I've just modded one r…
... plain, without artifacts, other than ULA and composite video artifacts.
SpecEmu 2.9I've been taking the latest versions of SpecEmu from the ULA Plus web site as and when they've been appearing, but the latest one (build 15/08/10) se…
... versions of SpecEmu from the ULA Plus web site as and ...Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…
... as people often think their ULA is dead, when it's ... I've never known a ULA to die.[/i]
ULA on a breadboard with the ...VIC 20 on the SpectrumThe original "20 Commodes" program released for CSSCGC 2008 has been improved and now has its own entry in WoS. The improved code has been sitting on…
... more boxes :
1) ULA-II support to show those ...Question about ZX81 componentAfter I cleaned and replaced some components (7805, two electrolytic caps) with fresh ones, and replaced the RF board with a composite one, on an iss…
... is right next to the ULA the screen was coming back ...Interesting AuctionCheck out the speccy with a 'bank' of LEDs and the Atic Atac Poster. [url]http://cgi.ebay.com/SInclair-ZX-Spectrum-lot-parts-books-ula-feet-etc-/270…
Check out the speccy with a 'bank' of LEDs and the Atic Atac Poster.
[url]http://cgi.ebay.com/SInclair-ZX-Spectrum-lot-parts-books-ula-feet-etc-/270675478234?pt=UK_VintageComputing_RL&hash=item3f058406da[/url]FS: My 48kIve decided to sell my personal, everyday 48k rubber key, reason being ive recently took delivery of another but this has nearly everything on the bo…
... ), new membrane and now working ULA in it (as supplied and ...Ula 6c00ieHi is anyone will to part with 1 or 2 of these for ?10 ea? Ping me I you can help
Hi is anyone will to part with 1 or 2 of these for ?10 ea?
Ping me I you can helpbroken 48K, strange screenwell I finally socketed all lower 16K ram chips, (8 of them in a row near corner, not those 4 in two rows) and replaced them with new ones but it did…
... is turned on.
strangely, ULA chip on this 48K is ...Error in the Schematics.Hi, i have been looking at a Speccy 48 PCB, and have figured out that all the Speccy schematics in the archive up to and including Rev 4a, contain an…
... to pin 37 on the ULA, not pin 27 as shown ...ZX Spectrum 48K,issue two - can't get it repairedI have an issue 2, which has some weird very small PCB hanging over the Z80. Some wire go to various places on the big PCB, two go to connections 36 …
... 36 and 37 of the ULA.
Replaced TR4 and ... say:
Z80 = working
ULA = working (type is 5C102E)
Not worth reading really - unless you have some spare time(Mods if you want to move it please do it does have a sort of hardware theme and a couple of recommendations at the end :) About two years ago now I…
... proud owner of a MicroDrive ULA - not many can say that ... on screen is nearly always ULA related. Anyway being into IT ... speccy had died was the ULA/lower ram, so what would ...ZX Spectrum 48K, issue - works fine till it gets hot (?)ZX Spectrum 48K, issue 2, works just fine, tested with Winston's diag board. At a certain moment in time however, it seems to run hot and stalls. Whe…
... .
Voltage regulator and ULA both get very hot, but ...Issue 6a black and white problemGot a 6a board, no colour, black and white striped border (when it should be blue or red), and the display visibly judders left and right slightly ev…
... ?
Composite modded, replaced ULA, checked memory, could this be ...Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…
... way of determining if the ULA or the CPU is reading ... signals are provided via the ULA, its a pain), Alas, its ...How the spectrum generates the video from ramHi everyon, I know that most people here allready know this but i think i found out how the spectrum acctually dispalys stuff and why the LD x, (HL)…
... order ram (> 16K) the ULA (or PIC in my case ...Fully integrated ZX+Hi, I just want to show some inspiration for integration HW to ZX+ case ;-) - ZX48 issue 3 board, without all parts regarding video generating (pa…
... /> - scandoubler which catch data during ULA VRAM access
- Divide with ...Smooth (vertical) scrolling on ZX SpectrumI was just thinking about this. You know, you have systems like Atari 2600 or Sega SG-1000 that have no hardware scroll, but they have games that sti…
... to do the tricks within ULA display time.
I ...Is ZX80 really "Z80 only"?The Spectrum has ULA to generate video display. Does the ZX 80 have any kind of processing chips apart from Z80? How is the video display generated o…
The Spectrum has ULA to generate video display. Does the ZX 80 have any kind of processing chips apart from Z80? How is the video display generated on ZX80? How does it compare to Atari 2600's CPU + TIA combo?ZX Spectrum Woes...In my endeavours to get my second Spectrum (Issue 3) working I have replaced the CPU, memory and lower ram. I have fitted sockets for the CPU and me…
... signal provided by the ULA is the 14MHz ULA clock signal divided ... shows pin 32 of the ULA as high and pin 6 ... wave. Pin 39 of the ULA is permanently high, although the ...Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …
... external ram pages are fast (ULA no slow down CPU and ...Faulty +2AHi! I have a +2A from a friend which is not working. I recently made a composite video output for it, using a small circuit from Sami Vehaama. When …
... ]
I think the ULA is faulty... but it could ...Is this the infamous Dead CockroachCan anyone help me. I have an issue two spectrum that I want to list on ebay, but I want to know if this has the dead cockroach ULA fix. I would have…
... this has the dead cockroach ULA fix. I would have presumed ...Does the usual composite mod damage Speccies?Hi people, Just browsing eBay -as you do - and I noticed this auction: [url]http://cgi.ebay.co.uk/ZX-SPECTRUM-48K-GOOD-COND-COMPOSITE-OUTPUT-SINCLAI…
... usual "whack the line from ULA straight to the modulator output ... popular, because by wiring the ULA straight to the output (and ... ) you can apparently damage the ULA.
Is this actually ... damaging my oh so precious ULA by doing this?Brief report about RetroEncounterAnother April... another retro event! (Firstly sorry for the quality of the photos, owing to not being able to find my camera battery before leaving …
... of an external FPGA-based ULA+ implementation) it was finally time ...ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…
... up at all, including the ULA. Im wondering if this is ...ZX Microdrive errorToday I started some ZX Microdrive having in the closet, and only one has given me problems with the typical [B]Microdrive Not present[/B] error. As …
... there is no problem of ULA and the motor starts, I ...
