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Spectrum 48k benchmark program/resultsIs there any program (basic or assembler) to test performance of a Spectrum 48k? Want to compare results in my FPGA Spectrum 48k with real hardware …
... used for researching the updated contention and timing information in the latest ... -
ZX in FPGA...Hmm..seems nobody is interested in a replacement PCB with FPGA...well..heading towards next FPGA projects then...C64 and others (o; [ This Messag…
... the original's speed. All contention patterns are implemented (Basic rom ... core but uses a different timing and pipelined architecture for 1 ... -
A few questions regarding EmuZwinI had posted this in the development forum and then remembered there was an emulators forum, so apologies for the repetition. 1. I have been trying …
... lot about how that affects timing.
[/quote]
It ... for the details on memory contention.
[quote]
4 ... -
MacFuse 0.7.0: performance and TR DOS problemsI can't praise Fuse enough for being such a comprehensive emulator that' still updated regularly. I'm grateful for all the new features in version 0.…
... it's just some bizarre timing issue in the way most ... smoothly, and there's no contention issues either - all the multicolour ... -
Which Emulator do you use the most? and whyI currently use ZX32, it's free, which is great but it's not as fast as I'd like. Please everybody, tell me your fave emulator and why. I'm quite …
... the floating bus and memory contention. However most software will run ... hardware that rely on precise timing to trick the hardware into ... -
Which Emulator do you use the most? and whyI currently use ZX32, it's free, which is great but it's not as fast as I'd like. Please everybody, tell me your fave emulator and why. I'm quite …
Which Emulator do you use the most? and whyI currently use ZX32, it's free, which is great but it's not as fast as I'd like. Please everybody, tell me your fave emulator and why. I'm quite …
... correctly take care of contention and display timing.
[/quote]
contention and just plot the display ...Which Emulator do you use the most? and whyI currently use ZX32, it's free, which is great but it's not as fast as I'd like. Please everybody, tell me your fave emulator and why. I'm quite …
... correctly take care of contention and display timing.[/quote]
There ... reasons for that....
Memory contention is very easy to code ...Weird loaders; 1) Why? 2) How? (Curiosity question)Hello again. Sorry to be asking/posting so much today, but I've just arrived here and am plumbing the depths of nearly 22 years of making cups of te…
... the ULA contention issue,which would knacker up the precise timing needed ...Weird loaders; 1) Why? 2) How? (Curiosity question)Hello again. Sorry to be asking/posting so much today, but I've just arrived here and am plumbing the depths of nearly 22 years of making cups of te…
... the ULA contention issue,which would knacker up the precise timing needed ... numbers take account of the contention on 'port #fe'? If not ...Emulating the SamRAM on the ZX Spectrum SEGerton Lunter gave me permission to reuse the code, but so far I have not been able to get the software to work in paged RAM banks.
... to do both Pentagon timing and ZX timing - hell, I'm sure ... the mainboard that switches RAM contention on/off, which is where ... comes in.
Want ZX timing? Add jumper J1-J2.
Want Pentagon timing? Add jumper J2-J3.
Emulating the SamRAM on the ZX Spectrum SEGerton Lunter gave me permission to reuse the code, but so far I have not been able to get the software to work in paged RAM banks.
... the timing issue on the Pentagon stems from the lack of contention ...Emulating the SamRAM on the ZX Spectrum SEGerton Lunter gave me permission to reuse the code, but so far I have not been able to get the software to work in paged RAM banks.
... issues - I just highlighted RAM Contention as it's something that ... machine type and alter their timing routines accordingly (shock megademo is ...Emulating the SamRAM on the ZX Spectrum SEGerton Lunter gave me permission to reuse the code, but so far I have not been able to get the software to work in paged RAM banks.
... include switchable CPU timing, cycles/frame and memory contention. But again I ...Z80 cycle contentionHi, Does anybody knows exactly when the ula halts the Z80 clock during a memory r/w cycle? I mean which Z80 clock cycle, T1 or T2? Thanks..
... that the timing is different on the +2a/+3 - memory contention here ... /> Regarding the timings of the contention, check out the CSS FAQ ... .com/cssfaq/reference/48kreference.htm#Contention"]48k[/url] and [url="http ...Information on SpecyBob or other new spectrum hardware?Hello all, I'm looking to make a new spectrum from scratch, and would like to find information online etc about how to go about doing so. I've heard …
... />
Display circuit with programmable timing and capable of 4 memory ... . At 3.5 and 7MHz contention is emulated and can be ... turned off. Above 7MHz contention is required. I actually had ...Which Speccy is the best to buy...I'd be using it for games really, and thats about it. I'd like a 128k but I seem to remember people saying 128k +2's had problems playing some games.…
... ?[/QUOTE]
Surely the timing on some games will still ... screwed up by the memory contention though?non standard loader bar coloursAs with my speedloader thread, when did non standard colours start to appear and who came up with the idea and what was the reaction?
... RAM may cause timing problems due to memory contention so such a ... , it is due to memory contention that you will not find ...GP2X - Spectrum EmulationHi all. Looking for advice on the GP2X and (especially) the quality of its ZX Spectrum emulation. Has anybody anything to say about the console - is…
... z80 format bugs, enabled memory contention emulation and added an option ... />
Current problems:
- Timing ain't perfect yet. You ... this weekend to add proper contention emulation, looking the FAQ and ...The new GP2Xpectrum releases threadYeah, I know the thread title isn't exactly too original, but I've decided that just one post to hold all updates makes more sense than a lot of smal…
... instruction timings
- Added bus contention for IN and OUT
- Replaced the memory contention emulation using a more precise ... />
With all of this timing has improved a lot (Aquaplane ...The new GP2Xpectrum releases threadYeah, I know the thread title isn't exactly too original, but I've decided that just one post to hold all updates makes more sense than a lot of smal…
...
- Added bus contention for IN and OUT
- Replaced the memory contention emulation using a more precise ...
With all of this timing has improved a lot (Aquaplane ...
Excellent news. However, memory contention isn't all that important ...The new GP2Xpectrum releases threadYeah, I know the thread title isn't exactly too original, but I've decided that just one post to hold all updates makes more sense than a lot of smal…
... 189870]Excellent news. However, memory contention isn't all that important ... code.
Besides, wrong timing can make a game faster ... sound. And even more, timing may have a direct effect ... glitches aren't due to timing problems before I start playing ...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…
... usual documented T-states (contention start at 14335) differ ... modes when the memory contention is implemented according to ... br /> [QUOTE]The timing of the IO contention however is different. Again ... is contended by the memory contention!!)[/QUOTE]
...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…
... /> Precisely! But there was some timing info in there, wasn't ... there was enough known about contention, it might have happened that ...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…
... saying about the actual timing of the contention and byte fetches).
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…
... test anything to do with contention.[/QUOTE]
Two discussions ... time:
a) 1T state timing difference (original thread).
b ... an IO instruction that experience contention, and when that is.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…
... time:
a) 1T state timing difference (original thread).[/QUOTE]
contention, and when that is.[/QUOTE ... interrupt do not experience memory contention?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…
... ]So, has the "[I]contention starts at 14336 and continues ... I]" statement come about because contention was investigated using IO instructions ... long, which means the contention can be applied anywhere in ... the real 1 tstate timing difference between machines.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…
... :
[I]"I think contention occurs whenever the address bus ... = 0x4000 - 0x7fff AND MREQ high contention selection?
It seems ... - I wonder if the timing isn't too sensitive.
contention than the 48K ULA (specifically ...MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]
... , it is not running :(. 2T timing of read/write cycle is ... due to +3's ULA contention. Don't know...
