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for a stupid: what?s NMI?erhm, yes, I?m not familiar with it... :rolleyes: I know the function of a hardware ?snapshot? button from Didaktik M/Kompakt, but I?m not familiar…
... bother to search... :o
[/QUOTE]
Yeah, this subject has ... NMI flip flop is triggered on the falling edge of ... be retriggered. Compare this to the usual interrupt routine.
T state of an instruction) whereas BUSRQ can cause the z80 to ... -
The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... tables, every integer from 2 onwards would have to be ... maybe the rules would state that 2 should be ... but I wouldn't know where to start on, say, a ... writing games and demos to get dragged into such ...
I don't mind nattering on here about it once ... -
*** New Game *** Farmer Jack Now AvailableFARMER JACK IS NOW AVAILABLE ... ?2.99 + ?1.00 UK Postage (or a nice pack of cigars) I haven't updated the website yet though, as someone volunt…
... Retro Gamer reviewer probably didn't give the game much time ... and reviews regarding new software on your old computer, keep it ... Mart in Micro Mart, out every Thursday ;-) Advertisment over :-P< ... comes across as a servant to the subject rather than a personality ... -
Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... don't know why they do it either. Every once ...
If you want to try to write in C then z88dk ... still in a very early state. I will write the ... an MSX or Atari Console to work on TS2068?
[/quote]< ... that possible to modify a PC drive to work on it?
Uridium on the Speccy: definitive version?Uridium is one of the staples of the C64 shoot-em-up canon. I first played it on the Speccy twenty years ago, but became much more familiar with it …
... really is the subject of this thread! ;) ) Uridium on C64 was seen ... arcade version is superior in every way, but prefer the arcade ... of the smoother gameplay (due to smoother scrolling, clarity etc..), better ... etc.. So I don't think the Spectrum version is ...Hello from America!!!Hi there! Well, I've now been in Arkansas for a week now, and I would like to post a few things that have made me chuckle while I've been here: 1) T…
... patriotic (or don't see the need to demonstrate it that ... big country, and in every city/state you will find something ... the huge Miner Willy on the back and another ... a sinclair Spectrum 48k on the back, both with ... the Sinclair rainbow on the front in the ...Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…
... . But if you need to do video on top...
*If ... , you'll also need to output pixels every 0.5 z80 cycles ... />
Not saying it can't be done with a uC ... .
Edit: although a state machine and lookup tables can ...The Banana - the Atheists' nightmare[url]http://www.godtube.com/view_video.php?viewkey=c5280214e0486b273a5f[/url] I'm still trying to work out whether this is a p*ss take or not. Whate…
... I recommend a good book on the subject?
... thread has been allowed to go on for so long, ... considering that the chit-chat forum guidelines state ... politics and governments tend to end in flame wars ... that if they don't believe in a personal ...C# emulatorHi, I wanted to branch out and get a little better with C# so I think I need something meaty to do to keep me going....so an emulator seemed a reaso…
... the TStates value and carry on again?
Also, the ... br />
After every opcode, test the T-States counter. When it ... interrupts.
You need to subtract 69888 (or whatever value ... frame's worth of T-States) from your T-State counter. This will ...New Spectrum Game Available to DownloadTo celebrate the forthcoming 25th anniversary of the Spectrum's launch I've written a new game for the machine. This one is a significant departure …
... . Trouble is, I usually concentrate on the game first and only ... it's finished. Details are subject to change over the course of ... />
I'm presently working on a game design which is ... Fruity were. I won't know every aspect of the game until ...Bonsai trees.Anyone here trying to bring up a bonsai tree?> I just love the little suckers ... makes me feel like I have a purpose ... I don't have any kids of m…
... the weekend). I can't believe how nicely everything ... grows there. Isn't a huge garden and ... thereabout and will need to finish the garden "design ... on it and other stuff around the house every weekend ... .
And to be on the subject... a month ago I ...Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…
... going into the high impedance state) it could conceivably result in ... - however, you won't be able to mate your other Z80 ... displaying results on LEDs so that the ULA needn't be fully ... when contention occurs). That will probably be easier than trying to stop ...Why I Hate PES online...first time I tried PES online (PES5) I was really excited with the idea of playing with somebody else that was not in my close group of friends... a…
... like to consider myself something of an expert on this subject and ... every year? Why doesnt this happen to Konami?
There hasn't ... with skill. they foul every time. sometimes the ref ... mess. offsides and fouls every few seconds compound the misery ...Woohoo for ME!!!!Well after 6 months of arsing around with immigration and stuff, I have a real job now (not helping the wife in the cafe), well actually including th…
Cut and paste on the subject...
"After that I ... , state, or sovereignty of whom or which I was theretofore a subject ... takes some positive legal action to renounce his citizenship. This is ... acquiring a second one doesn't normally do the trick."Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... count is reset to 0 on interrupt) so the T state reading in Spectaculator ... pixel on every frame without any skipping. So the hesitation seems to be ... issue, probably having something to do with the fact the ... :) If someone tries it on a real machine maybe they ...speed of my Broadband connectionI have done a speed test on my Broadband connection and got a result of 2.5 and 4.2 megabits, the thing is i have just upgraded my connection to 20me…
... 't matter how good the ISP is, you still have to rely on ... has been known to lock up maybe once every couple of weeks ... them to justify these charges, they refund you the money and state ... that they won't give you a ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... to yours which does not. This all checked with Spectaculators T state ... counter, no mental gymnastics required :)
[quote]
Isn't ... wouldn't normally use. A switch to globals ... to get the same scroll speed. With a display on every ...Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…
... that was causing MegaShock demo to fail on the Harlequin 8-) < ... sensitive) turned out to be a significant memory contention timing issue....
to a ZX Spectrum 48K - not 1 T-state out as ... they were before - all due to this 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…
... contended instructions seem to align correctly on the first contention and the rest ... is then just few T ... ]Can we prove the 1 T-state discrepancy between ulatest3 and the ...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…
... this T-state.
Testing I see the same results on a ... forced to suggest that the first T-state ( 0 ) is being lost to the ... experience memory contention?[/QUOTE]
Accepting the missing T-state idea, I ...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…
... T-state would you say it was usual for tests to measure memory contention ... ?
ie where do they assume the contention ... range 0x4000-0x7fff is placed on the address bus - this ... I have the src for to see....
...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…
... T-state would you say it was usual for tests to measure memory contention ... wanted to ask - the IO contention table in FAQ and on Wiki ... assumes there is just one type of contention ... applies memory contention when it sees #40xx-#7Fxx on the bus ...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…
... /> The contention pattern used to hold the CPU clock depends on the state of ... first one can't be certainly contended by IO contention, as IOREQ ... are contended at the 2nd T-state
- Ports with A0 high ... A0 is low, the 1st T-state is also contended, 3rd and ...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…
... The contention pattern used to hold the CPU clock depends on the state of ... to going on, then?
[QUOTE]-If A0 is high, all T ... last T states were contended, we would not be able to ... due to the 2 state uncontended gap in the contention pattern we can't ...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…
... the IO it needs to answer to going on, then?[/QUOTE]
... to the 2 state uncontended gap in the contention pattern we can't ... and 0x7FFF appears on the bus, contention will be applied ... was deduced on the assumption there is just one contention pattern, ...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…
... don't know. I've always wanted to try it on real spectrum ... T1 itself, or does the contention really take place at beginning ... 0x4000 - 0x7fff). For IO, the contention starts at T2. For port ... and over, increasing the start T-state so that you've measured ...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…
... have come to the following conclusions:
1) The T state 14342 ... that the address always appears on the bus during T1, but ... , similarly to how the OUTed data are not clashing on the data ... if you change the memory contention to be the same as the ...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…
... come to the following conclusions:
1) The T state 14342 ... t (or didn't seem) to be enough time for the memory to stabilise on ... reverting the buses back to CPU, and ... if you change the memory contention to be the same as ...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…
... based on what's happening at a T-state level, and memory contention does ... not appear to be so ... for the IO contention on T2 working to push T3 to after the byte ...I've just has a vist from the Jehovah's.I've just has a vist from the Jehovah's Witnesses (of was it the pastie's grandad). Apparently the end of the system is comming very soon. :o I jus…
... didn't Jesus see, in a single instant, every sin ... isn't present within a tube of smarties, on the ... your god-viewing glasses on at the time, of ... will be subject to the same laws as every other particle ... or telephone signals to any point on the planet, and ...
