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128K Contention - How to get it right?With my recent hardware hackery, I've built a 128K (toastrack) clone. I can't quite get the contention right though. What I'm lack is a clear descri…
... 0x7ffd, 0xbffd and 0x3ffd port contention behaviour.
contention tests, as well as 0x3ffd ... /> To correct the excessive contention, I replicated ULA14 and ... tests!
1. Can someone describe accurately the contention ... -
Spin 0.666 Little Bug using 48K Keyboard helperHello, There is a little bug in the 48K Keyboard Helper. If you try to write an inverted commas ("), LOAD "", for example, if you press the p key a…
Phil is indeed right - ZXSpin passes his contention tests no problems now that marko has turned contention back on :-)
I've also discovered a bug in the sound, which will be fixed for 0.667 (coming soon!).
D. -
Another fusetest runWould anyone with a real machine be prepared to try the latest version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url], my…
Hi.
Ran the tests on my grey +2 with ... .
I ran the contention tests on the +2/MB02+ combination ... -
Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…
... .5.6) the contention is not accurate, 7 tests fail (2, 3 ... .5.7 version mention no contention fixes.
I used ... all![/QUOTE]
All contention tests passed OK. Please note that ... -
LDI questionWhen using LDI (or LDD) is it possible to access the value that is transfered from (HL) to (DE), or does the Z80 use an internal data cache to store …
[QUOTE=Basher;761210]I will be interested to see if the contents of the DE registers appear on the address bus during the final M cycle of CPI.[/QUOTE]
Contention tests have shown only the HL value on the address bus at that time. -
Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... playing a bit with memory contention and floating bus stuff in ... sense it starts applying the contention a few cycles earlier, namely ... really like to try some tests on a real machine but ... .ae.krakow.pl/~jb/qaop/tests.html"]zxtests[/URL], ulatest3 in ... -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... ] UK. My tests are still not detecting Timex TC2048 (I wonder if ... do not match contention and frame duration tests this program will print ... -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... .[/QUOTE]
I did some tests in the Fuse too. If ... my tests (and the Fuse) are to ... the structure of the contention pattern on TC2048 and TC2068 are identical ... unsurprisingly different, and since my contention test depends on the frame ... -
Memory Map/ContentionHi I'm new to speccy coding (well I did some z80 coding a few years back - like 20yrs ago :) ), and I'd like to get back into writing some scrolling…
... a correct map for memory contention?
Address Size Area ... -
I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…
... .s faq describing I/O contention.
The 48k ... to lead to the following contention patterns:
High ... /> in 40 - 7F? | Low bit | Contention pattern
------------+---------+-------------------
No | Reset ... -
PAW tests - help and discussion :)Hello my friends :) I have started to make some tests with PAW and I must say I'm very pleased and surprised at the great program. I will be posting…
... have started to make some tests with PAW and I must ... -
Tc2048In case any one is interested, I saw this on eBay [url]http://cgi.ebay.com/Timex-Computer-2048-TC2048-made-in-portugal-RARE_W0QQitemZ250124510994QQi…
In case any one is interested, I saw this on eBay
[url]http://cgi.ebay.com/Timex-Computer-2048-TC2048-made-in-portugal-RARE_W0QQitemZ250124510994QQihZ015QQcategoryZ1247QQssPageNameZWDVWQQrdZ1QQcmdZViewItem[/url] -
MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…
... have written a series of tests in [URL="http://homepage.ntlworld ... -
48k Timing Tests...Here's v1 of the timing tests for the 48k Spectrum, with a little background [IMG]http://www.zxspectrum4.net/images/timing_test_v1.jpg[/IMG] [URL="…
... 's v1 of the timing tests for the 48k Spectrum, with ... -
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 …
... in-depth tests fail (ex. some tests in FuseTests, IR-Contention) and ...
Now, coming to the tests, the V6Z80p version works pretty ... well. All the tests I've tried until now ... Fusetest is OK, IOcontention OK, contention OK, Float48K OK, FloatSpy OK ... -
Man tests law by claiming to be a 'pastafarian'While reading this [URL="http://www.stuff.co.nz/oddstuff/5289988/Man-tests-law-by-claiming-to-be-a-pastafarian"]article[/URL] I thought of Rubberkeys…
While reading this [URL="http://www.stuff.co.nz/oddstuff/5289988/Man-tests-law-by-claiming-to-be-a-pastafarian"]article[/URL] I thought of Rubberkeys... :razz: -
Fusetest port 0x7FFD test resultsHi, I'm adding the Spectrum 128K emulation to my FPGA core running on the V6Z80p platform. I'm doing some tests; running Fusetest, the machine is se…
... tests; running Fusetest, the machine is seen as 128K and the contention ... offset is 0x08.
All the tests pass ... -
Robocop 3 and Spectrum 128K toast-rackHi all, we are going on with the tests on the new 128K emulator for the V6Z80p board, and we have found something odd: Robocop 3 (designed for the 12…
... are going on with the tests on the new 128K emulator ... does port accesses creating IR contention (as, if we are right ... -
JSSpeccy v2.0 releasedI'm pleased to announce version 2.0 of JSSpeccy! [url=http://jsspeccy.zxdemo.org/]Online version[/url] [url=https://github.com/gasman/jsspeccy2]Sour…
... passes Fuse's unit tests, including memory/port contention, which means...
Zymosis -- WTFPL'ed Z80 Emulation Corebreaking news! i'm back with another useless project: new Z80 emulation core written in pure C! i hear you screaming: "oh, no! WHY?!" let me tell yo…
... , zymosis passes all FUSE z80 tests (i'll try to build ... if it is really does contention and other things right; for ...BIT b,(ii+n) contentionThe documentation says that BIT b,(ii+n) has this contention pattern: pc+1:4,pc+2:3,pc+3:3,pc+3:1 x 2,ii+n:3,ii+n:1 See [url]http://scratchpad.wiki…
... b,(ii+n) has this contention pattern:
pc+1 ... Tstate.
So the contention pattern should be:
TC2048 Power SupplyDoes anyone know what power supply specs TC2048 need? I found them once, but I can't seem to locate them any more. My TC2048 is outputting a lovely r…
... know what power supply specs TC2048 need? I found them once ... locate them any more. My TC2048 is outputting a lovely rainbow ...Timing in loading routinesJust for curiosity I have done some experiments with SAVE command in accurate emulators, and then analyzing the generated WAV and I have obtained lit…
... don't take account the contention. There are two instruction with ... contention, OUT (FE),A that affects ... .
So in my tests I have the next results ... compared with the teorical (without contention) values. If we take the ...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…
... 've just finally fixed a TC2048 that had numerous problems. Once ...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 …
I'm trying to understand contention and its implications when some ... both memory and I/O contention. Memory contention causes T1 to be ... ?
Also: memory contention makes T1 to be enlarged ... for instance, to avoid memory contention) that begins at the ...Fuse tests - INC BC causes contention delayHi all, In the FUSE test suite it has the following for the output of opCode 0x3 (INC BC): 0 MC 0000 4 MR 0000 03 4 MC 0001 …
Hi all,
In the FUSE test suite it has the following for the output of opCode 0x3 (INC BC):
0 MC 0000
4 MR 0000 03
4 MC 0001
5 MC 0001
Where this is defined by:
...Question of contentionI'm not desperate to go digging through technical descriptions in depth, but one thing bugs me about the Speccy's video contention model - and that's…
... about the Speccy's video contention model - and that's the ... /> And then there's the contention pattern where the memory is ... 16, so that means the contention pattern covers a run of ...Issue 4A, tests complete fine but get odd crashing problemHi all, I've got an issue 4A which has had all of its lower RAM replaced, TR4, TR5 as well as its CPU. It originally had quite high voltages (20-3…
... point and indeed passes the tests using the ZX Spectrum Diagnostics ...
