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Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... and Y. So, don't need to bother about ... br /> [/quote]
Count T-cycles: Stepdown function takes minimum 22T ... cycles (4+4+4+10 ... where POP is only 10T cycles. All in all - applied ... of 192*(22-10)=2304T cycles. That's not too ... -
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…
... clock cycles and I don't even have to count clock cycles or ...
If the lines don't meet up its because the ... mean you save 200 clock cycles for every point you ... point that's 400 clock cycles saved on just 1 ... in code aren't by counting clock cycles. It's by ... -
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…
... did I say it wasn't isometric ?
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t built it for anything ... can. You can't just count clock cycles here or there ... similar games that don't suffer the performance issue ... exclamation marks... I didn't say AND YOU SAY ... -
Death of the Computer Science DepartmentRead this article on the death of the computer science department in universities by Neil McBride from De Montfort. It makes very interesting (and wo…
... to be able to count the cycles, so to speak, ... is because I don't believe the ever increasing ... longer and I don't believe yields for such ... most computer scientists don't know how the hardware ... sounds like most wouldn't mind that computer scientists don ... -
PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…
... of pulses longer than 65535 T cycles is suboptimal (one second pulse ... - the treatment of zero repeat count seems as extra code, even ... for the treatment of repeat count of zero duration pulse ... may use repeat count, and zero repeat count is eliminated. Pulse ... -
PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…
... are in range of thousands T cycles at maximum, so there is ... was to store the repeat count only when needed. Single pulses ... and without any repeat count. The repeat count would be included only ... , the rest as the repeat count. The dictionary would be simple ... -
PZX file support for ZX-BlockeditorDear readers, I'm working on the PZX format support for ZX-Blockeditor, as I discovered the advantage of having such a nice file format. It has a cl…
... 's intended. The tzx2pzx doesn't attempt to preserve the pulses ... may be up to 0x7FFFFFFF T cycles, however longer durations may be ... /> 8000*199 --> high (odd count)
8655 --> low
Colour clash on the Commode64?Was there any? Every now and again, I see a screen shot like this... [img]http://www.lemon64.com/games/screenshots/full/j/jack_the_nipper_02.gif[/i…
... bit. But it still doesn't have the 4-bits-per ... rather than you having to count clock cycles.
However, there ... a lot of games don't use quite as many or ...yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
[QUOTE=csmith;506129]AA, couldn't sleep?
[/QUOTE]
... resource that user processes aren't allowed to alter.
< ... , you need to count T states, not M cycles when measuring time on ... the z80. One T state ...ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... .zx7
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Count the cycles:
[CODE]ticks demo.bin ... [/CODE]
Or count the cycles and test if cruncher do ... />
Edit4: If you don't want to download fcut, this ...Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... go. Learn how to count T-States and some common optimizations ... results than squeezing a few T-cycles from a poorly chosen algorithm ... of intermediate values needed. Don't waste a register pair if ... Likewise, storing 5*X isn't necessary: once calculated, you can ...Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... you go. Learn how to count T-States and some common optimizations ... results than squeezing a few T-cycles from a poorly chosen algorithm ...Fastest way to clear a screen.We haven't had an optimizing fun for some time, so let's have some: What's the fastest way to clear a screen (i.e., filling the 6912 bytes at 16384 w…
We haven't had an optimizing fun for ... 12 bytes and whopping 145163 T cycles, if I have computed it ...Pong[IMG]http://www.rickard.gunee.com/projects/video/pic/ponggame.jpg[/IMG] Bats are on the left and right side of the screen. On ZX Spectrum there are …
... ZX Spectrum there are extra t-cycles available when drawing @ edges of ... . from point of view of t-cycles we could say border is ...RealXThis may be a dumb question but will RealX ever get released?
... to different offsets used to count t-states, that's all.
t-states offsets (first contention, electron ...My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... optimized for unrolled. Just 33 T-cycles per attribute. It is a ...PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…
... . Of course, it doesn't mean that other platforms can ... . For example, I don't care if CPC people use ... the pulse durations in 4MHz T cycles. In fact, I think ... different needs and I don't believe we can sufficiently ... It's just I don't think Wiki is the right ...PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…
... to convert the microseconds to T cycles whenever it loads or saves ...Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... 41 bytes and with 93 T cycles overhead (assuming I computed those ...Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... 41 bytes and with 93 T cycles overhead (assuming I computed those ... accounting for the extra odd t-states, which is where the ...Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... (33 bytes, 96 T cycles overhead or 113 T with CALL included). ... the remainder to 4 T without the use of ... 58 bytes, 76 T cycles overhead or 93 T with CALL included). ... would use 2 more T cycles and more bytes due ... have added the 17 T for CALL overhead in delay ...Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... (58 bytes, 76 T cycles overhead or 93 T with CALL included).[/QUOTE ... in minimum overhead of 51 T cycles (68 T with CALL included), but ...Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... in minimum overhead of 51 T cycles (68 T with CALL included), but ... /> Patrik[/QUOTE]
Aren't you forgetting the RET (10 ...Beeper octave range...A dumb question, I know, but I've found two conflicting sources of information on the octave range of the Sinclair beeper. I suppose I'm being a lit…
... do the math how many T cycles you need for each semitone ...Beeper octave range...A dumb question, I know, but I've found two conflicting sources of information on the octave range of the Sinclair beeper. I suppose I'm being a lit…
... do the math how many T cycles you need for each semitone ...In-game music takes CPU time?If a 128k wants to have music played in-game using the AY sound chip, does that consume a lot of CPU time? What I am after is if the reason why man…
... so that you don't have to count t-states very accurately, and ... well planned out, you don't really need to use them ... notes though, so it needn't be too bad. I'd ...Maze Mania - How did they do it?Hi, I was looking at the game "Maze Mania" by Hewson Consultants, written in 1989. The game can be downloaded from here [URL]http://www.worldofspec…
... /> This takes about 79,000 T-Cycles, so I reckon with some ...Maze Mania - How did they do it?Hi, I was looking at the game "Maze Mania" by Hewson Consultants, written in 1989. The game can be downloaded from here [URL]http://www.worldofspec…
... x 79,000 (160,000) T-Cycles :-o
Right, time ... /> The above takes about 250 T-Cycles
So we would ... (8064 bytes)
Doesn't leave much for a game ...Fastest Block Drawing Code?Following on from my scrolling thread [URL="http://www.worldofspectrum.org/forums/showthread.php?p=351304#post351304"](http://www.worldofspectrum.org…
... in PASMO and takes 2772 T-Cycles to draw one 4x4 char ... it down to about 2000 Cycles, as I plan to draw ... all the logic in 4 cycles thus getting 12.5 frames ...
