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<1…10111213141516…34>
  • He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…

    ... IFF, the correct number of cycles to jump to the start ...
    Winston Winston September 2007 Chit chat
  • 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…

    ... know we have about 14000 cycles before the TV raster begins ... the screen and thereafter 224 cycles per each pixel row. Since ... 14000 + 20*8*224 = 49840 cycles to complete the scroll after ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…

    ... , posssibly - could make the timing cycles go much faster and burn ...
    DEATH DEATH October 2007 Sales
  • How many levels does Chuckie Egg have?I've always believed it to be 256 before the game repeats itself. There are phases of 8 levels, but with variations between each phase. I'm pretty …

    ... loops continuously in 8-level cycles. The amount of nasties in ... the level decreases during subsequent cycles until it reaches 400 at ...
    jamieangus jamieangus October 2007 Games
  • CNN's Larry King Live NAFTA single currencyBye bye dollar ! [url]http://www.prisonplanet.com/articles/october2007/091007_fox_admits.htm[/url] Just as a matter of time ;) And naturally the fi…

    ... all. And Canada's economic cycles do not act in phase ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Chit chat
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... of contention, but with 7 cycles out of 8 contended whereas ...
    Woody Woody October 2007 Hardware
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... of contention, but with 7 cycles out of 8 contended whereas ...
    omega omega October 2007 Hardware
  • New Game: BeTiled! by CEZGSIt's out: [url]http://cezgs.computeremuzone.com/eng/card.php?id=19[/url]

    ... no other ZX has enough cycles to get the intro going ...
    Tom-Cat Tom-Cat October 2007 Games
  • Input/Output on Edge ConnectorI would like to sense a pulse on the data bus via the edge connector, i.e. on or off. How do you decide what port it is on? I would also like to send…

    ... persists for a few clock cycles.

    Then IORQ goes ...
    Winston Winston October 2007 Hardware
  • Input/Output on Edge ConnectorI would like to sense a pulse on the data bus via the edge connector, i.e. on or off. How do you decide what port it is on? I would also like to send…

    ... more about the Z80 IORQ cycles, you need to read this ... 18 (see 'Input or Output cycles')
    Winston Winston October 2007 Hardware
  • 50Hz on PC?Hi, do you know of any emulator for PC that can switch monitor refresh rate to 50Hz or closest possible and sync ZX interrupt with monitor refresh?…

    ... about code that counts CPU cycles for high precision, but still ...
    zub zub October 2007 Emulators
  • 50Hz on PC?Hi, do you know of any emulator for PC that can switch monitor refresh rate to 50Hz or closest possible and sync ZX interrupt with monitor refresh?…

    ... about code that counts CPU cycles for high precision, but still ...
    Laser Laser October 2007 Emulators
  • 50Hz on PC?Hi, do you know of any emulator for PC that can switch monitor refresh rate to 50Hz or closest possible and sync ZX interrupt with monitor refresh?…

    What about timing the delay and stick in wait cycles in the audio loop to compensate?
    Van_Dammesque Van_Dammesque November 2007 Emulators
  • 50Hz on PC?Hi, do you know of any emulator for PC that can switch monitor refresh rate to 50Hz or closest possible and sync ZX interrupt with monitor refresh?…

    ... delay and stick in wait cycles in the audio loop to ...
    obo obo November 2007 Emulators
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... there are no special refresh cycles for 16k part of RAM ...
    brian-82 brian-82 November 2007 Development
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... are no any additional refresh cycles (or there is no need ... ) for 192*224 = 43008 z80 cycles in a frame. That leaves ... about 70000 - 43008 = 26992 z80 cycles = 7.7ms when no display ... misunderstood you... "no additional refresh cycles" while the ula draw the ...
    Alcoholics Anonymous Alcoholics Anonymous November 2007 Development
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... there are no special refresh cycles for 16k part of RAM ...
    csmith csmith November 2007 Development
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... /INT pulse is about 30 cycles which was unknown at one ...
    Alcoholics Anonymous Alcoholics Anonymous November 2007 Development
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... /INT pulse is about 30 cycles which was unknown at one ...
    csmith csmith November 2007 Development
  • How does the Z80 work internaly?How does the Z80 work internaly, i.e. how does it actually execute a machine code instruction? When it fetches a byte from the memory and finds, for…

    ... of the next few clock cycles
    - the register store, which ...
    gasman gasman November 2007 Development
  • Benchmark timeWell, the BASIC benchmark posted in Creative Computing back in the 80s came up as a topic on the AtariAge forums. The article is available online an…

    ... 6/4000*1.79e6 = 2685 cycles per operation (I assume this ... clock). With at least 2 cycles per instruction this is a ...
    Alcoholics Anonymous Alcoholics Anonymous December 2007 Sinclair Basic
  • Benchmark timeWell, the BASIC benchmark posted in Creative Computing back in the 80s came up as a topic on the AtariAge forums. The article is available online an…

    ... 6/4000*1.79e6 = 2685 cycles per operation (I assume this ... clock). With at least 2 cycles per instruction this is a ... at double speed and splits cycles between the CPU and video ...
    JamesD JamesD December 2007 Sinclair Basic
  • Benchmark timeWell, the BASIC benchmark posted in Creative Computing back in the 80s came up as a topic on the AtariAge forums. The article is available online an…

    ... at double speed and splits cycles between the CPU and video ... instructions to multiples of 4 cycles *all the time* in order ...
    Alcoholics Anonymous Alcoholics Anonymous December 2007 Sinclair Basic
  • another c64 vs. Speccy site...[url]http://c64vsspectrum.com/[/url] 25 years and we are still brawling.. ;)

    ... for the screen memory nick cycles off the processor. It's ...
    TMR TMR December 2007 Games
  • another c64 vs. Speccy site...[url]http://c64vsspectrum.com/[/url] 25 years and we are still brawling.. ;)

    ... is only a few CPU cycles.

    The BBC Micro ...
    Matt_B Matt_B January 2008 Games
  • A serious question (in case you think it's facetious)Alright, so none of us can tell the future, and equally no one knows for definate what oil/gas etc reserves are left and where, but I was talking to …

    ... who have studied the suns cycles for years?...or geologist that ...
    beanz beanz January 2008 Chit chat
  • A serious question (in case you think it's facetious)Alright, so none of us can tell the future, and equally no one knows for definate what oil/gas etc reserves are left and where, but I was talking to …

    ... who have studied the suns cycles for years?...or geologist that ...
    Zagreb Zagreb January 2008 Chit chat
  • A serious question (in case you think it's facetious)Alright, so none of us can tell the future, and equally no one knows for definate what oil/gas etc reserves are left and where, but I was talking to …

    ... who have studied the suns cycles for years?...or geologist that ...
    Winston Winston January 2008 Chit chat
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... . This will clearly cost some cycles, but it doesn't eat ...
    omega omega January 2008 Hardware
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ... takes at minimum 10.5 cycles per byte. This means ... 6144*10.5 = 64512 cycles at minimum or less than ... which can function at 16 cycles per byte or 16*6144 ... = 98304 cycles for a full screen (1 ... hope for using ldi (16 cycles per byte).

    ...
    Alcoholics Anonymous Alcoholics Anonymous February 2008 Development
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