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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]
... -
Fuse/SPIN vs Spectaculator border timingsHello, I'm trying to figure out at which moments the 48K ULA samples the current border color into its internal latch. To do that I wrote a small …
... which moments the 48K ULA samples the current border ... githubusercontent.com/kosarev/zx/master/test/border_timing/screenshot.png
test/border_timing/border_timing.tap
test/border_timing/border_timing.asm
why cant i get the +2a / +3 self test program to work on an emulator?ive tried 2 different emulators. i can get to the test pattern but thats all. holding the keys does nothing
ive tried 2 different emulators. i can get to the test pattern but thats all. holding the keys does nothingReplacing 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 ...esxDOS v0.8.7 releasedesxDOS v0.8.7 has been officially released. Grab it at http://www.esxdos.org/files/esxdos087.zip. This version has the following (notable) new fea…
... (enabled in ESXDOS.CFG - please test and report)
[*]New "utime ... )
PLEASE NOTE: The .128 command has not been updated ...Another Spectrum is brought back to life.Hi Spec-chums. I have been having bit of busy afternoon with repairs today. I've brought back to life a Panasonic Super-VHS recorder, and more intere…
... with the seller keeping the ULA ic. Pictures in the auction ... did was to fit a ULA and get the board to ... was all good, a quick test power up displayed a solid ... ][/img]
Next a test power up greeted me with ...Can someone run this test program on a real Spectrum 48K?I've knocked up a small test program just to satisfy my emulation OCD if someone with a real 48K Spectrum can spare a couple of minutes to run it.? …
... 've knocked up a small test program just to satisfy my ... and will display one of "Test passed!", "Illegal interrupt response" or ... 'm kind of hoping for "Test passed!" on real hardware!
A couple of random questions......because, why not? (1) USR0 mode on the +3/+2A/B I know of its existence, I know how it's used, and I have some games that require it to work o…
... Loader, or typing LOAD "" in 128 BASIC? And was there some ... found a small ZX80 memory test program that holds a small ...ZX Spectrum +3 keyboard faultHi all I've powered on my zx spectrum +3 for the first time in a couple of years. It seems to have developed a fault with the cursor keys. I can'…
... 128 menu except loader :(
All other keypresses (that I can test ...Test card screenStarted off just messing about in order to test a machine. But ended up with this: [code]10 FOR a=0 TO 0 STEP 0: PAUSE 1: BORDER 1: BORDER 2: BORD…
... messing about in order to test a machine. But ended up ...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 ..Microdigital TK95 / TK90X - my experiencesAs asked for by Renegade [url="https://worldofspectrum.org/forums/discussion/58189"]here[/url] I'll do a short writeup of my experiences with my TK90…
... -N _or_ PAL-M (the ULA supports both standards) to get ... 's good enough to further test the machines.
I went ... be done (since the TK-ULA outputs RGB + bright directly) but ...zx spectrum 48k issue 6A boot fail- black paperohh whats wrong with this poor specie .. boot fail,, border white & paper black .. when reset it shows the red lines to indicate that the CPU is cycl…
... .. but the contention test fails, the interrupt test has a warning about ... a known working -7 type ULA. checked most of the signals ...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 ...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 ... .
Did a 5V test on the 7805, and it ...Starglider 128Can anyone help with this? I've downloaded this game from several sites but none of the versions had the excellent speech synthesis I remember this …
... a Z80 file of Starglider 128 that is definetly the 128k ... of these is diffucult to test.
If you want ...Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …
... loads acc with the value 128
so when the byte ... referred by NMBRS, so the test for 8ah is effective only ...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…
... br />
For a correct test do not press any key ... machine.
The ULA chip uses the same pin ... FE are always one. The ULA with the lower 16K of ... of the Z80 and the ULA are connected by small ... the lower 16K, the ULA halts the processor if it ...RealspectrumCan anyone tell me why sometimes when I launch realspectrum it locks up on the welcome screen? I am running it in a DOS shell within windows 98. I'm …
... the menu bar on the 128 I press the down cursor ... Woody said, you need to test using the sound muted (latest ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... is impressively compact.
The test values that appear earlier in ... becomes 247,128
128,1 no change
128,64 becomes 128,96 ...FoonI've recently discovered Foon, which is a Speccy emulator that runs on the Gameboy Advance. I have used it with a GBA emulator to try and get a feel…
... will fit, try making a 'test' file - i.e. don't ... the flash cartridges in 64, 128 and 256 megabit sizes.
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 ...
