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Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…
... so it's already in contention. Successive lines line up too ... the line-by line memory contention. The problem has always been ... two lines in succession, in contention, it's fallen into synch ... with the contention so there are no early-timing gaps either. -
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…
... />
The different contention just means that timing critical stuff that's ... may still have the wrong contention). -
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…
... ;631304]The different contention just means that timing critical stuff that's ... may still have the wrong contention).[/QUOTE]
Yes, and ... -
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…
... : there was a bug in contention emulation, so it was emulating ... [b]should[/b] emulate 'early timing' machine, but... border text in ... -
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…
... there was a bug in contention emulation, so it was ... b]should[/b] emulate 'early timing' machine, but... border text in ... Possibly. FUSE has accurate border contention, but not the offset bitmap ... Multicolour is much easier with contention. You can be a lot ... -
BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... /> I know it's about timing the swap, but I understood ... /> (Edit: Something to do with contention keeping it synched?) -
FBZX Wii ReleasedJust tried this out on my Wii and it seems pretty good. 128K AY sound not very good but the emulator is highly configurable. Not bad for a first rele…
... precision emulation setting (floating bus, contention, interrupt timing)
- Added NTSC 48K ... -
BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... that it's got no contention which means that unlike ZXodus ... guesses to sort out the timing, you have to be t ... -
BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... that it's got no contention which means that unlike ZXodus ... guesses to sort out the timing, you have to be t ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... information about TK90X timing:
[LIST]
[*] Memory contention is identical to ... loop also depends on memory contention to keep everything synchronized. Although ... indicate the same contention pattern, since a different contention pattern (for instance ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... is correctly emulating that memory contention and main video updates in ... is also emulating TK90X border timing as if it was 5602 ... -
Spectrum 128 toaster and divide incompatibility problems with some demos and games.Okay so I got this thing now. It?s my first Spectrum ever. [img]http://img836.imageshack.us/img836/2016/speccyl.jpg[/img] [url]http://img824.image…
... thing that require the broken contention of the 128 and the ... and you will get timing errors on timing critical code. This is ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... on all Spectrums from a timing perspective - in other words, regenerating ... signal which goes away during contention periods - and therefore avoid the ... a test that simulates ZX contention, then go and test the ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... on all Spectrums from a timing perspective - in other words, regenerating ... signal which goes away during contention periods - and therefore avoid the ... a test that simulates ZX contention, then go and test the ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... for SPECTRA to operate (sync timing with ULA).
The SPECTRA ... to count T-states pre-contention, and therefore know exactly where ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... , and this all depends on timing of CPU speed vs. speed ... at "full speed" with no contention.
[I][B]Mark ... -
Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... cause small incompatibility with original timing in some ZX demos...
contention:
[url]http://velesoft.speccy ... -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... /> [LIST]
[*] The contention pattern.
[*] Whether spurious contention is applied as ... . not considering MREQ when applying contention).
[*] Whether all ports in ... even numbered ones.
[*] The timing of the first pixel read ... -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... ]
[*] The contention pattern.
[*] Whether spurious contention is applied as ... not considering MREQ when applying contention).
[*] Whether all ... ones.
[*] The timing of the first pixel ... knowledge than me about timing stuff in TK90X.
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... better knowledge than me about timing stuff in TK90X.[/QUOTE]
timing of 14362 for the 128K ... ,3,2,1,0,0 contention pattern starts at 8759 T ...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…
... the main problem is the timing reference. TZX and PZX works ... .5% slower than 128K (without contention).
Also I have ...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…
... .5MHz based T-States for timing, but I can live
contention as well, it's nothing ...WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... decode it and trigger the contention handler if needed. In ... /> - Do a preventive I/O contention based upon partial decoding. That ... ports. [I](* Or very little contention.)[/I]
One ... byte as if no contention occured, although the timing would not be ...WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... significant change over moving the timing of the second pair fetch ... altering the timing in the ULA+ to reduce IO contention, it is ... chips, after startup, with zero contention - and it's a real ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... the timing between the 50/60 Hz interrupt and contention for ... border output and the contention pattern, which I believe ... ?0x7fff, detail of the contention pattern and its synchronisation, ... whether spurious contention is applied as per the ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... the timing between the 50/60 Hz interrupt and contention for ... border output and the contention pattern, which I believe ... ?0x7fff, detail of the contention pattern and its synchronisation, ... whether spurious contention is applied as per the ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... not know how to measure contention time. Is there already any ... can I find info about contention patterns? [/QUOTE]
You ... length as well as the contention patterns of various things using ... /misc/timingtest-0.2.zip"]timing test[/URL] program.
< ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... length as well as the contention patterns of various things using ... /misc/timingtest-0.2.zip"]timing test[/URL] program.
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... there to check for possible contention fluctuations, but it hardly applies ... .blogspot.com.br/2013/04/timing-test.html]blog[/url].
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... important to confirm that contention doesn't start earlier ... should cover the first entire contention cycle.[/QUOTE]
... and 8850, the awaited contention patterns became apparent (see ... .blogspot.com/2013/04/timing-test.html]same posting[/ ...
