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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 …
... at which moments the 48K ULA samples the current border color ... -
ZEsarUX stable 7.2Hi! I have uploaded a new stable ZEsarUX version 7.2! You must go to the Releases section on the GitHub project to download It, as usual: htt…
Replacing 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…
... 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 ...A next Spectrum ROM with Turbo and MonitorI made a copy of a secondary ROM file that was used in my Didaktik Gama (Czech Spectrum clone with original ULA) but it was probably made for 48k Spe…
... (Czech Spectrum clone with original ULA) but it was probably made ...Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
Hi Guys
Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I correct assuming its reading a byte of screen ram then an attribute byte, and so on...?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 ...ZX Spectrum rescued from a friend, has Issues.Hi guys, I've recovered this ZX spectrum 48K from a friend. It's a 1984 ISSUE 6A. He told me the last time it was turned on was about 30 years ago!.…
... Diags, all of the tests (ULA, RAM, ROM) were OK, so ...How do emulators make code appears as running at 3.5Mhz?Decent Z80 emulators on github return t-states after executing an instruction, giving you the ability to emulate Speccy relatively well. But there ar…
... 23 t-states), isn't ULA painting during the instruction too ...ZEsarUX Beta 8.1Hi! I have uploaded a new ZEsarUX 8.1 BETA version. You can download compiled versions for Windows, Mac, and the source code from: https://gith…
... scroll x,y on ula layer
-optimized ula,lores render routines ...ZX Interface 1Hi, I have a ZX Interface 1 which I have bought online. It does not seem to work. When using CAT1 or any other specific commands, the compute…
... ' transistor soldered directly on the ULA. Ula is LA15-302.
ULA.
All these seem ... ROM is dead or the ULA?
And another question ...ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…
... official SD images
-optimized ula,lores render routines: 2% less ... /> -added scroll x,y on ula layer
-added 1-bit ...
-fixed "bit 7 = Disable ULA output (soft reset = 0)" on ...ZX Spectrum 48K Issue 4B No soundHi, I have a ZX Spectrum 48K Issue 4B without sound. I tested the ULA on another Spectrum and works fine, tested the speaker and it has the correct …
... sound.
I tested the ULA on another Spectrum and works ... , tested continuity from pin 28 ULA to emitter of TR7 no ...48k issue 4B display problem etchi,, i have a zx spectrum 48k issue 4B with a display issue it has wavy lines in both the border and paper,some colours seem worse than others ie red…
... ,new lower ram module.different ULA,crystals,full re cap,disabling ...zx spectrum +2 no clock signal ??help me ...... looking at a specie +2 (original +2) it is the Z70700 issue 1 (uk one) i seem to have no clock,no display,no sound at all. it is sho…
... lot done,i know the ULA/ROM/CPU are good as ...Speccy 4A board problemHi all. I was hoping for some help with my Speccy (with 4A Board) before I send it off for repair. When I power it on all looks fine (i.e. copyright …
... screen. I've swapped the ULA with a known good one ...48k spectrum pausing the clockI had a spectrum 3b motherboard donated to me with no case. So i have decided to put it in a custom case with built in kempston port etc. I also …
... on one side to the ULA and the other side is ... (in the same way the ULA does AFAIK). The switch sometimes ...zx spectrum 48k interference during first two minutes of warm upi have a issue 3B 48k that i am looking at during the first two minutes (approx.) of warm up there is interference on the screen (tried to take a pic…
... only chip in socket is ULA which i have tried swopping ...Direct drive LCD screen - looking for information on previous projects people may have attempted.Hi All, My first post, so please forgive and guide if I've posted in the incorrect section. I'm a speccy user from way back in the 80's, but m…
... LCD panel, with some extra ULA registers, so I can add ... won't rely on the ULA to drive the signals at ... probably replace much of the ULA, perhaps even relocate all of ...zx spectrum display corruption .. with lower ram module installed[img]https://photos.app.goo.gl/Gu6rjC5v21sZxwTX9[/img] [img]https://photos.app.goo.gl/FznVw8SkbbhWn5mh7[/img] another specie question : i have …
... removed the rom, tried different ULA,recap,composite mod, voltages are ...Repairs and Reparing.Hi All, Just finished resurrecting an Issue 3A board. Had black lines, so replaced the lower 16K RAM chips, Amazed they just cost a couple of doll…
... 'm terrified of losing a ULA as I imagine they are ...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 ... 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…
... a known working -7 type ULA. checked most of the signals ...zx spectrum +2 RGB cable /// pin out/ voltagesi have a +2 cable that seems to be made well from a well known supplier.. it actually came with a +2A i recently brought but most defiantly is not su…
... strain on other components ie ULA,TEA2000 . normally i make a ...New Version of ZEsarUX v9.3 Beta 1 availableNew Version of ZEsarUX v9.3 Beta 1 available Downloads: [url="https://github.com/chernandezba/zesarux/releases/tag/9.3-25062021"]https://github.co…
... window height
Fixed Next ULA Scroll to use registers 0x26 ...specie external keyboard - revision one -[img]https://photos.app.goo.gl/pqeYpXnLqTwYkLvKA[/img] revision one of my external keyboard ... wow it actually worked after a little bit of crash…
... read .. trying to read the ULA book by chris smith .. very ...boot fail .. bad address lines A7,A12,A13anybody have any ideas what could be wrong with this specie issue 3B .. work done : removed rom, upper ram & logic put lower ram multiplexers in sock…
... ) tried different CPU's & ULA's. fitted lower ram module ...Missed opportunities in the 80'sAll the talk of the Loki got me thinking... What if someone had built an expansion box for the speccy that had the 3812 Yamaha music chip ( Adlib Sou…
... keyboard, doing away with the ULA and taking things from there ...
