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ULA TEST 3 results on real hardwareHi guys, I'm writing small spectrum emulator and I wanna implement precise emulation for different spectrum models :-) I found nice test for conten…
... :-)
I found nice test for contended memory - [URL="http ... -
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…
New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…
... nice features as a rudimentary ULA test, testcard for tuning VR1/VR2 ... pots, soak test facility etc.
Also ...ZX Diagnostics v0.33 releasedHi everyone, I'm pleased to announce the release of v0.33 of zx-diagnostics. This release contains the following changes: - ULATest: Detect …
... show ULA type, and new TR6 check
- ULATest: New tape test ...
- ULATest: New addressing test - check that ULA does not respond to ... Kempston/Sinclair joysticks to select test card/ULA test as well as soak ...ZX Diagnostics v0.35 ReleasedHi all, I'm pleased to announce the release of zx-diagnostics v0.35, downloadable from [url="https://github.com/brendanalford/zx-diagnostics/relea…
... issue is detected in soak test mode
- Allow ... / ULA / soak testing
- Add countdown beeps prior to test start ... with Timex port conflicts during ULA test
- Handle rollover of ... soak test count properly
- Fix ...It's fitting...... that in the very month that the 25th anniversary of the Speccy falls on, I'm just finishing up making my first ever Spectrum peripheral. It's a …
... it will include a simple test (like the Spectrum ROM ... and finally run a test to demonstrate that the memory ... - basically, do a functional test in a sequence once the ... on the LEDs when the ULA test is done. If everything ... to RAM (the RAM test passed by this stage ...Strangely, I just can't STOPOK, I bought an RWAP keyboard matrix and put it in my Spectrum+ last night (ta), I did the Swedish composite mod with a capacitor, I fixed the missin…
... screen with the flashing words "ULA TEST".
I've never ... to guess which kind of test it is performing. Might it ...A redesigned version of Winston's diagnostic board[U][B]A redesigned version of Winston's diagnostic board[/B][/U] This is a continuation of a project that started in a hijacked thread [URL="http://…
... the firmware too, the updated test ROM is now reasonably bug ... /> I've added a soak test mode, a testcard (to help ... /VR2 adjustments) and a rudimentary ULA test.
Flash tool's ...A redesigned version of Winston's diagnostic board[U][B]A redesigned version of Winston's diagnostic board[/B][/U] This is a continuation of a project that started in a hijacked thread [URL="http://…
... the firmware too, the updated test ROM is now reasonably bug ... /> I've added a soak test mode, a testcard (to help ... /VR2 adjustments) and a rudimentary ULA test.
Flash tool's ... as .tap-type) for the test-rom ready for burning? In ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... is constant too. A test ROM that counts interrupts would ... />
The zx-diagnostics test ROM I work on has ... such a test, but it's fairly ... the end of the memory test.
I'll ... counter into that ROM's ULA test mode, sounds like it might ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... 've added a new interrupt test mode to my diagnostics that ... down, It'll enter a ULA test mode.
This should ... /brendanalford/zx-diagnostics/wiki/Firmware#ula-test"]here[/URL] for more details ... by Winston, the ROM checksum test will always fail as you ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... 've added a new interrupt test mode to my diagnostics that ... down, It'll enter a ULA test mode.
This should ... /brendanalford/zx-diagnostics/wiki/Firmware#ula-test"]here[/URL] for more details ... by Winston, the ROM checksum test will always fail as you ...Understanding contentionI'm trying to understand contention and its implications when some "weird" bus cycles (such as I/O cycles with I/O addresses in the contended memory …
... early timming mode, executing the ULA TEST 3 by Jan Bobrowski, modified ...New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…
... features as a
rudimentary ULA test, testcard for tuning VR1/VR2 ... pots, soak test
facility etc." ? How to ...Speccy won't bootHi all, I've got an issue 3 48k that won't boot properly. When I turn it on, it either does one of the two following things, it either displays a …
Can you try a ULA test (hold down U on startup) ...Speccy won't bootHi all, I've got an issue 3 48k that won't boot properly. When I turn it on, it either does one of the two following things, it either displays a …
... ' message as soon as the ULA test is entered, or do you ... run the interrupt generation test or another test on that screen to ...Speccy won't bootHi all, I've got an issue 3 48k that won't boot properly. When I turn it on, it either does one of the two following things, it either displays a …
... of it going into the ULA test:
https://youtu.be/zub7r8N2D2g ...ZX Spectrum Issue 2 - 12V badHey there, I'm currently attempting to fix a ZX Spectrum issue 2 that I recieved. Overall the machine was generally working when I recieved it, bu…
... removing the BC547-'amp' the ULA test works as expected without any ...If Sinclair computers had not been sold...I was just having a random thought. If Sinclair Computers (or the rights to them, not sure how it 'worked' back then) had not been sold to Amstrad…
... ‘fix’ was incorporated in later ULA chips, but the original design ... only hidden features are the ULA test modes. These have no practical ... br /> The 6C001 and subsequent ULA chips had more matrix cells ... had ‘tidied up’ the ULA I/O address decoding (currently ...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…
... .
I swapped ULA and the machine kept failing ... the diagrom test screen, So maybe both ULA are bad? ... Not sure where to look to test ... .
DiagROM ULA test gives no problem, but I ... not sure how complete this test is.
...problem when game finished loading 128kI have this problem when some 128k games finishes loading. It just hangs, some time the screen gets corrupted, sometimes nothing happens. It looks …
... the vague (ish) built in test in the ROM. The fact ... one or both offer a ULA test, I'd guess there were ...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 ... information about when the ULA actually fetches the screen ... I have prepared new test which can be used to ... owner would run the ptime test from [URL="http://zxds ... please run the btime test from the same archive and ...ZX Spectrum 48K clone and test resultsHi! This is my first post, so, first of all, I'd like to say hello to the whole community! I am Alessandro Dorigatti from Italy and I'm developing …
... Chris Smith "The ZX Spectrum ULA: how to design a microcomputer ... .
The first failing test is IRContention; I will try ... the text shown by the test and they are in the ...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 the ... bits of displacement, and the ULA start the frame with the ...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 ... their native (version 6) ULA happened to be.
... the game Chaos as one test. The problem also becomes ... much more severe as the ULA (I assume) warms up ... makes me think the ULA must sometimes wrongly read ...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 ... a lot of things to test. In the following days, I ... on it to act as ULA, with a true Z80 and ... way I hope to tune ULA timmings in case there's ...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…
... have a real spectrum to test the results.
I ... emultor is writing in the ULA video register the second screen ...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 ... so I can not even test if it can load games ...Issue 3 ULA ProblemsI've been given an Issue 3 48k to fix. It was producing no video and no picture on the TV. The coil was buzzing so it was getting power and all the v…
... problem might be with the ULA.
Sure enough ... it with a spare ULA from an Issue 4( ... program loading works. Memory test shows no bad IC's ... br />
If the ULA is only partially working, and ... the wrong tree with the ULA because when dropping the ...
