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csmith talks about games/ULA book on EITBHere is what looks like a very rough edit, courtesy of EITB (Basque country TV) with Chris Smith about the ULA book and game engines of back in the d…
... ) with Chris Smith about the ULA book and game engines of ... -
Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…
... read a bit in the ULA+ for test if supported. And ... bits of displacement, and the ULA start the frame with the ... -
ZX81 Dark screen, could it be the ULA?Trying to get a ZX81 going for a mate of mine, already replaced the membrane (Cheers Rich!) but now its the old "very dark screen" problem, probably …
... " problem, probably caused by the ULA and fixable with the composite ... this could be a damaged ULA that his mod may not ... -
Slightlt OT. - ZX81 ULA Modulescomming soon... ZX81 ULA module. Plugs into original ula socket, provides composite video output (requires vwry small mod to bypass UHF Modulator, b…
... .
Plugs into original ula socket, provides composite video output ... constant 3.25Mhz from the ULA to your sound card (or ... -
Can anyone test my Issue 2 ULA?Hi guys, Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know whether I have…
Hi guys,
Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know whether I have a faulty ULA or not before trying to source one from somewhere. -
4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…
... perfectly with a 5C112E ULA. I have just been ... whatever their native (version 6) ULA happened to be.
... much more severe as the ULA (I assume) warms up ... makes me think the ULA must sometimes wrongly read from ... address or of the ULA's latching of bytes ... -
ULA snowHow is this feature implemented in emulators ? And how exact is the emulation ? I somehow supposed that ULA snow is something that is not very determ…
How is this feature implemented in emulators ? And how exact is the emulation ?
I somehow supposed that ULA snow is something that is not very deterministic in nature. But if one can emulate it (perfectly ?) then i was wrong. -
Experiments mixing ULA+ and Timex Hicolour featuresI'm trying to improve my Verilog skills, so I've written a description of a complete ZX Spectrum 128K (+2 grey ROMs), with AY-3-8912. I wanted to add…
... -8912. I wanted to add ULA+ support, and in the way ... been used to implement the ULA+ palette registers.
I ... to add this to the ULA+ page, if you wish ... -
ZX Spectrum ULA core available at OpenCoresHi! On April, 23th, I opened a new project at the OpenCores website: [url]http://opencores.org/project,zx_ula,Overview[/url] Right now, it has a, h…
... , hopefully, complete description of the ULA chip, written in Verilog, and ... on it to act as ULA, with a true Z80 and ... way I hope to tune ULA timmings in case there's ... -
For which Spectrum is this ULA?For which Spectrum is this ULA? Ferranti ULA 9RB015E 8428 Micky
For which Spectrum is this ULA?
Ferranti
ULA 9RB015E
8428
Micky -
ULA Chips Wanted UrgentlyHello, I am looking for following ULA chips to repair my Speccies: Issue 2 board ULA5C112E 1 pc Issue 3B board ULA6C001E-6 or ULA6C001E-7 2 pc…
... /> I am looking for following ULA chips to repair my Speccies ... -7 2 pcs
ULA 2C158E for ZX81 1 pc ... -
ULA bug and snowI am tryng to improve the snow emulation in FBZX wii but I do not have a real spectrum to test the results. I used the information taken from Harele…
... emultor is writing in the ULA video register the second screen ... -
ULA chipHi, Does anyone have an ULA chip for a Spectrum 48K issue 2 for sale?
Hi,
Does anyone have an ULA chip for a Spectrum 48K issue 2 for sale? -
128k ULA pinout?Is there someone who has a circuit diagram or pinout for the 128k (+2) ULA?
Is there someone who has a circuit diagram or pinout for the 128k (+2) ULA? -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... kindly sold me a 128K ula since the one in my ... . But even with the new ULA, I still can not load ... -
ZX +2 Grey with quiet ULA soundHi all. I come here for advice before messing up with the main boards and end up killing them for good. I got this grey ZX +2 with a very low ULA a…
... with a very low ULA audio. The ULA sound is low to ... is fine.
The ULA was checked OK with another ... -
THE ULA CHIPDoes anyone know which the ULA chip is in Spectrum +2 ?
Does anyone know which the ULA chip is in Spectrum +2 ? -
Strange failure modeI just had a 48K machine "fail" in what seemed like an odd way. Problem: Random keypresses (not from any particular part of the key matrix) appearin…
... all the inputs to the ULA to make sure the pull ... a possible problem with the ULA.
But when I ... functional).
So unexplained faults with Spectrums? The moral of ... -
Lot's of ZX Spectrum parts: RAM chips, ULA's, etcI have new stock of 100% tested parts. I even got my hands on a bunch of ULA's!! [IMG]http://benophetinternet.nl/hobby/sales/parts/IMG_6068.JPG[/IMG…
... hands on a bunch of ULA's!!
[IMG]http ... [/B]
- 48K / 128K ULA
- Zilog Z80 3.5 ... -
WANTED: ULA chip for Issue two SpectrumHello, I fired up my Issue Two ZX Spectrum a couple of weeks ago, and it seems my ULA chip is failing again. Has anyone got a spare working chip the…
Hello,
I fired up my Issue Two ZX Spectrum a couple of weeks ago, and it seems my ULA chip is failing again. Has anyone got a spare working chip they'd be willing to sell? Please PM me if you can help.
Regards,
Kamil -
ZX Spectrum ULA + Glue Logic in VHDL for EPM78128SLC84Hi. I'm wanting the VHDL code for the Spectrum ULA and Glue logic to pop onto a Alter MAX EPM7128SLC84 (CPLD) IC. I'm wanting it to perform : Memo…
... VHDL code for the Spectrum ULA and Glue logic to pop ... -
ZX Spectrum ULA + Glue Logic in VHDL for EPM78128SLC84Hi. I'm wanting the VHDL code for the Spectrum ULA and Glue logic to pop onto a Alter MAX EPM7128SLC84 (CPLD) IC. I'm wanting it to perform : Memo…
... VHDL code for the Spectrum ULA and Glue logic to pop ... -
128k toastrack with an amstrad ULAI received a 128k toast rack today with an "amstrad" ULA fitted, I'm wondering if this is fairly common or more rare, presumably manufactured after t…
... rack today with an "amstrad" ULA fitted, I'm wondering if ... -
ULA Plus demonstration!I have seen with my own eyes the ULA+ in action - the actual real hardware. Fortunately, so did the camera in my phone. Here's a short (shaky) video …
... with my own eyes the ULA+ in action - the actual real ... short (shaky) video of the ULA+ being demonstrated by mcleod_ideafix at ... -
Needing a Timex 1000 ULAHello all! A friend of mine needs a Timex 1000 ULA. Anyone willing to sell one or who could point me at a place where he could buy some at a fair co…
Hello all!
A friend of mine needs a Timex 1000 ULA. Anyone willing to sell one or who could point me at a place where he could buy some at a fair cost? -
Which ULA?Just a quick question, more of interest rather than immediate need... I am thinking ahead about the repair of an Issue 2 board, and also an Issue 6A …
... of which 'may' need replacement ULA chips.
After a ... sure whether any ZX Spectrum ULA can be used, or whether ... each issue has specific ULA chip requirements. I'd be ... before heading down the new ULA route.
Cheers,
Interface 1 ULA - what does it do and what not?I heard a rumour a few weeks ago: that the Interface 1 ULA does not control the Microdrive, but mainly the ROM and network. Many of us (like myself)…
... that the Interface 1 ULA does not control the Microdrive ... almost always we suspect the ULA.
So the ... is completely tied to the ULA.
No question ... it certain that the ULA causes the most problems?< ... ensure it is indeed the ULA that fails mostly?
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
... 0x40-0x7F then the ULA gets confused by the ... memory address generated by the ULA (who wants to read ... two addresses. Therefore the ULA reads the data from an ... is actually read by the ULA is the following:
ULA is busy drawing the border ...48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
I've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working 48k pluses now. :)
Anyone else come across this?New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... make sure I got the ULA timing 100% right. We know ... reliable information about when the ULA actually fetches the screen bytes ...
