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R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …
... NOPs to maintain R registers 'counting'. If set bit 7 of ... -
The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
Though think of the I register in the $40-$7f range, the R register and memory refresh cycles :)
This is only my first attempt at controlling an effect that's been known about for years! -
The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
... the address bus during refresh cycles is still supplied by the ... LD R,A after 14322 cycles followed by 32xNOP (and repeating ... every 224 cycles, adjusting R when necessary for ... floating bus appears after 14339 cycles for the first couple of ... -
A very first computer, a very first gameMaybe i'm duplicating some other posts, but... what was your first computer and game??? For me it was a rubber zx-spectrum 48k and tape with only t…
... on the spectrum were Light Cycles from PSS and Space Walk ... -
+3 soundhello there, just a quick-fire question today. i'm kinda keen on the idea of using my +3 quite a bit, particularly if i bother to to actually sort …
RealXThis may be a dumb question but will RealX ever get released?
... confused by the memory refresh cycles of the Z80 (performed during ...AgentX2 RemixingI`ve started to remix AgentX2 and need some help with the drums. Anyone care to add the drum track to [url=http://www.franksmusic.homecall.co.uk/spe…
... for the drum beat. It cycles this beat over and over ...ZXLFN - storing tape header in a long file nameHi lads ;) Couple of months ago, the group of guys interested in divIDE software development has came up with an interesting idea - store tape heade…
... going to implement that by counting the number of files and ...RealXThis may be a dumb question but will RealX ever get released?
... all have some reference for counting time. It's time to ...RealXThis may be a dumb question but will RealX ever get released?
... is down to individual machine cycles and therefore would require a ...Scorpion 256K games? Pentagon 512K games?I wondered if there were any games that used more than 128K.
... use more than 128K (not counting multi-loads)? I know there ...Scorpion 256K games? Pentagon 512K games?I wondered if there were any games that used more than 128K.
... use more than 128K (not counting multi-loads)? I know there ...Problem with rotating procedureHi folks! I wrote a proc in z80 asm, based on: x' = x * cos (z) - y * sin (z) y' = x * sin (z) + y * cos (z) I used a precalculated table of sin a…
... * sin(Y) takes just 77 cycles (if I remember correctly), which ...RealXThis may be a dumb question but will RealX ever get released?
[quote=Luca]Then it isn't clear to me what do you mean by "snow contention".[/quote]
Dunny likes to call contention based on the IR register pair outside of M1 cycles as snow contention. But only when it causes the snow.RealXThis may be a dumb question but will RealX ever get released?
... register pair outside of M1 cycles as snow contention. But only ... confused by the memory refresh cycles of the Z80 (performed during ...RealXThis may be a dumb question but will RealX ever get released?
... contention was outside of fetch cycles ;)
I know where it ...RealXThis may be a dumb question but will RealX ever get released?
... contention was outside of fetch cycles ;)
[/quote]
Ok. Then ...A Public Service AnnouncementThis thread is here for anyone to plug brand-new websites. I'll read it, so you'll get at least some marketing/exposure out of it... I'll start the …
... about 45 cgc games and counting) but it may show you ...Pimp my code...Erm, this is just the result of a mental exercise - I wanted to repeatedly display a UDG but decided against using a ROM routine and UDGs! Any sugges…
... single "LDI" step takes 16 cycles whereas a "LD (HL), ... : INC HL" takes 13 cycles. LDI does supply a byte ... )-5)/256 = 13.8 cycles per byte written. An LDIR ... takes close to 21 cycles per byte and an ... This saves close to 2 cycles per byte write, nothing to ...Pimp my code...Erm, this is just the result of a mental exercise - I wanted to repeatedly display a UDG but decided against using a ROM routine and UDGs! Any sugges…
... /> and takes about 5.7 cycles per byte. A hell of ...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…
... little creativity and some clock cycles from the CPU. No, it ...In Machine Code, what is the quickest way to sort bytes?I am playing around with some ordering of sprites, where I want to order them by vertical position. I used some Rodnay Zaks code to order some bytes…
... complexity may waste more clock cycles than it saves on a ... there are a few extra cycles between loops but the reduction ...Avast, me hearties! only 12 days to go!Talk Like A [url=http://www.talklikeapirate.com/piratehome.html] Pirate Day[/url], 19 September.
I've been counting down the days since last year. My timbers are shivering already.Bipboi Beta 2007.12Ok, this will be the final beta for a while, so I can add more levels etc. But, I have tried to respond to all comments. Some liked the origional k…
... amiss. If you have the cycles...
Level 3. The ...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…
... Spectrum counterparts?[/QUOTE]
Clock cycles for the 6502 are normally ... takes over 10 clock cycles! 23 clock cycles for an instruciton is ...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…
[QUOTE=JamesD]Clock cycles for the 6502 are normally ... takes over 10 clock cycles! 23 clock cycles for an instruciton is ...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…
[QUOTE=JamesD]Clock cycles for the 6502 are normally ... takes over 10 clock cycles! 23 clock cycles for an instruciton is ...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…
[QUOTE=JamesD]Clock cycles for the 6502 are normally ...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…
... difference in the average clock cycles.[/QUOTE]
JamesD, with ... take a lot of clock cycles, but these are not used ...