-
I've had better nights...So I got a broken issue 2 today, case in good nick but the diags board showing multiple failures in both lower/upper RAM. Never mind, good as a spare…
... random fill test. Replacing the ULA gets rid of the patterning ... other 4116's and a ULA... :-o
Looking back ... :x plus the 5C112E-2 ULA's only good for issue ... -
Simulate errorshi, i would like to know if its possible to simulate errors on an emulator? Like bad memory or bad ULA. Salut
hi,
i would like to know if its possible to simulate errors on an emulator?
Like bad memory or bad ULA.
Salut -
Another way to add audio input on a +2 - No more low level sound problem !Hi all, Last week, with 3 friends, we participated to a modelism / games / hobbies meeting, and we made a retro computing stand... (big succes, I'll…
... ) that proceeding that way, the ULA is protected.
The Speccy ... -
ZX Interface 1 ULAs FOUND !!Thanks to Ian Gledhill (of Mutant Caterpillar) we have now acquired a stock of replacement ZX Interface 1 ULAs. These are new old stock and have a d…
... a later version of the ULA.
See [url]http ... /%2ARARE%2A-ZX-Interface-1-ULA-Chips---LA15-312-3481[/url ... -
ZX Spectrum 48k - no CLK signalHello I'm trying to repair ZX Spectrum 48 mainboard issue 3B. When i check signal with oscilloscope on X1 or on ULA pin 39. I get stable 2V no clock…
... oscilloscope on X1 or on ULA pin 39. I get stable ... no clock pulses. Can broken ULA chip be the cause of ... -
Ben Versteeg's November sales[COLOR="Blue"][B][SIZE="6"]Almost ready[/SIZE][/B][/COLOR] [IMG]http://benophetinternet.nl/hobby/vanmezelf/sales/line.jpg[/IMG] [IMG]http://benophet…
... [/IMG]
[B]48K ULA (different types for issue 2 ... -
Spectrum +3e acting up...Hello, Well, my Spectrum +3e is starting to act up. All 48k games load fine but now no 128k games will load :/ In one 128k game, in the beginning r…
... there a memory test or ULA test, etc... for the +3 ... -
a few questions1. When will emulators use pc vga capabilities to emulate the uhf tv output accurately including phosphoric delay and crosstalk synchronization 2. W…
... hardware interlace like the spectra ula+ or zx prism
Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…
... .
Hmmmm... swapped the ULA, but it also worked perfectly ... puzzled. Apart from ROM and ULA, there's nothing else on ...Black Screen Spectrum 48kWas working ok, it came to me in a Fuller FDS keyboard, I had a nose inside and found a floating power lead connected to the keyboard, I removed that…
... />
Update: Tried another working ULA and it's not that ...Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... the Z80.
3. Intermittent ULA fault (easily testable - since the ... IOREQ high thus preventing the ULA from seeing odd numbered I ... was never fixed inside the ULA - TR6 instead became part of ... an NMOS output), causing the ULA to sometimes see spurious IO ...MISTER BEEP - the NEW ZX48 album 2014 "Chromospheric Flares"Hi mates. So. Here it is. Something like 2 years after the previous one - here is my new ZX Spectrum album "Chromospheric Flares". [img]http://mi…
... (jack) through 1-bit transducer - ULA chip.
Sometimes it sounds ... of ZX SPECTRUM (jack) through ULA chip - the 1-bit transducer ...Using even ports for input?I've been looking for unused ports to use with my clashbasher interface. I understand that the spectrum only considers A0 when decoding its input p…
... socket.
However the ULA is decoupled from the Z80 ... so the resistors between the ULA and the Z80 would be ... between the z80 and the ULA.
As long as ...Which Windows Emulator will support SPECTRA?I want to start crossdeveloping games for SPECTRA, but it is a pain in the ass to save the TAP on USB Stick or SD Card and test them on my eMac SP Em…
... .html[/url]
Everybody supports ULA+ which is still not available ...Timex Compute TC2048 loading problems solvedHi everybody, I've just finally fixed a TC2048 that had numerous problems. Once I'd changed all the RAM, the CPU and the ULA (surface mounted, for a…
... RAM, the CPU and the ULA (surface mounted, for added joy ... 0.7V threshold that the ULA uses to detect a tape ... .
So, of course, the ULA just read a logic high ...Issue 2 with 5C102E + cockroach on eBay(Posted here and not sales as it's not mine :)) Came across [URL="http://www.ebay.co.uk/itm/151225493166"]this[/URL] earlier - early Issue 2 board, …
... 2 board, complete with 5C102E ULA and dead cockroach. Looks from ...Help with an issue 2Hello friends, Today, sadly, my issue 2 board lost his 5c112 ULA, and on my spares list I only had a 6c one that worked fine after swapping it. Now I…
... 2 board lost his 5c112 ULA, and on my spares list ...ZX Spectrum 48K board Issue Two - spider modI have a working Spectrum 48K Issue Two for sale on Amibay. It?s an early version with an ULA 5C102E and the "spider-mod" fitted. [URL="http://www.a…
I have a working Spectrum 48K Issue Two for sale on Amibay. It?s an early version with an ULA 5C102E and the "spider-mod" fitted.
[URL="http://www.amibay.com/showthread.php?t=57438"]http://www.amibay.com/showthread.php?t=57438[/URL]Refactoring the ULAplus HDL descriptionFor the ZXUnio project, I'm refactoring the Verilog code I wrote two years ago to describe the ULA and the ULAplus devices. When I've taken this code…
... years ago to describe the ULA and the ULAplus devices. When ... it turned to be the ULA/ULAplus datapath.
The ... modules were in the original ULA (light yellow), what modules were ... .
This is the ULA/Timex/ULAplus datapath schematic (click ...Issue 3B suddenly goes black and whiteAnother 3B I have here had a faulty ULA, swapped that out for another and hurrah! Works! New keyboard membrane and composite mod later I load a game…
... have here had a faulty ULA, swapped that out for another ...ZX Spectrum 48K+ Audio out, Speaker, Volume controlI have this lovely ZX which a friend gave me kindly two years ago. I cleaned him well and after a year he stopped working, so I did a full recap and …
... and I bought from Ben ULA, ROM, CPU and some RAM ...Using 256 color emulator to remove color clash & update graphicsWhat are your thoughts in using 256 color emulation (like [url]http://www.emulatronia.com/emusdaqui/spec256/download-eng.htm[/url] ) but limiting the…
... color mode for example? Or ULA+ ?
Simply use the ZX ...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…
... Keyboard membrane, or IC1 (the ULA chip).
... signs of a faulty ULA chip are. Are there ... not seen any replacement ULA chips. In the event ... cannot remember exactly what ULA is on the board however ... for a certain model ULA.) Tomorrow I will check ...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…
Are 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 those usefull or useless? Will the cheaper vga heatsinks also do the job?Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... , based on the ideas behind ULA+ and SPECTRA. When the Z80 ... using a spare ordinary 48K ULA to turn the contents of ... Speccy cope with writing to ULA-contended memory of an external ... chippery, or just a spare ULA from a dead Speccy and ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... Timex-multicolour functions from the ULA+ specification[/B].
... we can actually get internal ULA+ upgrades, it would have ... probably be best if the ULA+ OUT commands that control the ... without much support. And yet ULA+ seems to be something people ...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…
... wrong power supply as the ULA had a bit missing and ...what video leads were available for 128+toast rack at the timei just wondered if anyone knows what original video leads were available for the toast rack at the time it came out,were they sinclair or 3rd party a…
... safe leads that wouldnt blow ula`s or anything else up ...Toastrack key sound but no imageGot a toaster that had a bad ULA, replaced that with one out of a grey +2 (Im sure ive done this in the past and it was ok), now i get the menu up bu…
... toaster that had a bad ULA, replaced that with one out ...48k no beeper sound (again!)Got three 48k+ here, all of which have the same exact problem, no sound out the beeper, same problem as detailed [URL="http://www.worldofspectrum.org…
... however the same solution, replaced ULA's to no avail and ... tried the original ULA's in a known worker ...
