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<1…16171819202122…34>
  • How do I avoid BASIC becoming corrupted on returning from a M/C routine?I'm having trouble with my BASIC program becoming corrupted on returning from a m/c routine which sets all the registers (including the shadow regist…

    I don't see any reason you couldn't get an interrupt between the RET and the LD IY. Looks like a classic race condition to me.
    Philip Kendall Philip Kendall May 2003 Sinclair Basic
  • Lunar Jetman = The Confusion 2k3I had a 128k Spectrum in my youth, now experimenting with a ZX emu on my Amiga I played some Jetpack and found out what an amazing game it was and th…

    ... , Clarence? And what's the vector, Victor? :)

    _________________
    Paul van der Laan Paul van der Laan June 2003 Games
  • Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…

    ... LDIR to real screen at interrupt time.
    [/quote]
    Much ...
    Alcoholics Anonymous Alcoholics Anonymous July 2003 Games
  • Mac2Spec v2I announced the release a week or so ago on c.s.s. but I thought I'd give it a plug here too. Mac2Spec is a graphics converter written in Objective-…

    Would it be possible to make a converter from 256x384 aspect ratio 32:24 to 2 spectrum screens that can be alternated between with the interrupt on a +2A which has 2 screen areas?
    Fraser Fraser July 2003 Announcements
  • Mac2Spec v2I announced the release a week or so ago on c.s.s. but I thought I'd give it a plug here too. Mac2Spec is a graphics converter written in Objective-…

    ... be alternated between with the interrupt on a +2A which has ...
    JamesW JamesW July 2003 Announcements
  • Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…

    ... at 50hz on a IM2 vector).

    Beeper overhead is ...
    cyborg cyborg July 2003 Games
  • Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…

    ... have [/quote]

    Every interrupt gives you a 50Hz rate ... . Every other interrupt gives you a 25Hz rate ... Spectrum because there is an interrupt available at that frequency.

    There is no 8000Hz interrupt which means you have to ...
    Alcoholics Anonymous Alcoholics Anonymous July 2003 Games
  • Is spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …

    Aha, we've found one :)

    Indeedy, Ninja Warriors has it's interrupt routine in a contended RAM page on the 128/+2 (page 1).

    It shouldn't crash but the display will be corrupt.

    Cheers,

    Jon.
    Jon Needle Jon Needle August 2003 Emulators
  • Which emulator and assembler?Hi, I am looking to learn z80 assembly language and I feel the best option is a spectrum emulator and an assembler. Can anybody recommend the best …

    ... R register behaviour during the interrupt acknowledge cycle on emulators. Or ...
    Woody Woody August 2003 Sinclair Miscellaneous
  • Yet another name-the-gameThe game I'm looking for is a space simulation. All I know about it is one detail: when you die, the cockpit dissolves with an effect almost identica…

    Umm.. is it a 3D vector game? if so try these:

    1) Starstrike 1 & 2
    2) Empire
    3) One of the Star Wars games

    Apart from that how bout:
    1) Psion 5 trading company
    2) The Echelon
    Arjun Arjun August 2003 Games
  • Turbo loadersDid turbo loaders actually make a 48k game load significantly faster? Taking into account the time taken to load the code for the turbo loader progra…

    ... is detected it triggers an interrupt... thats why you can safely ...
    Tom-Cat Tom-Cat August 2003 Games
  • 128 Memory PagingI'm having a problem getting my brain around paging. Well, actually the bit I don't understand is how reading I/O ports works! I hope the collective …

    Ah, we overlapped.
    I see you used PAUSE 1 to wait for the interrupt service routine to swap pages, but my method forced the page swap by doing the OUT - is this an acceptable alternative, or is this broken?
    trellis trellis August 2003 Sinclair Basic
  • YM effects on Atari ST reproducable on Speccy?From the YM music format site: "SID-Voice SID-Voice is a great sound trick on the ATARI, because of low CPU consuming and great sound effects. It …

    ... no longer use the 50Hz interrupt to make changes to the ...
    Alcoholics Anonymous Alcoholics Anonymous August 2003 Sinclair Miscellaneous
  • Spectrum Sound to WAVHiya, Are there any Emulators or AY Players that can rip music/sound effects from games and record them as WAV? I'm into writing remakes and would …

    ... the 3 channels, each 50Hz Interrupt, yes, the MID would be ...
    GOC GOC September 2003 Sinclair Miscellaneous
  • BASin Release 9a availableJust a quick not to say that an updated (ie, bug fixed) BASin is available. A list of what's new for release 9: Fixed a bug in the line tokeniser th…

    ... machine stack busy with the Interrupt Service Routine at switch on ...
    Geoff Geoff September 2003 Development
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... channel A on every vbl interrupt (which the Spectrum has) but ... able to use the 50Hz interrupt to change tone but probably ... contains information on the IM2 interrupt mode. Go to my webpage ... off not using the vbl interrupt.

    About another question ...
    Alcoholics Anonymous Alcoholics Anonymous September 2003 Development
  • C, Z88DK and the Sprite Pack Library I wrote a short demo that shows a taste of what can be done from C on the Spectrum: [url="http://justme895.tripod.com/zqa/pacmen.zip"]http://justme…

    ... /> + Complete support for the IM2 interrupt mode.

    + Rectangle, Interval ...
    Alcoholics Anonymous Alcoholics Anonymous September 2003 Development
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... of the tracker during the interrupt so that you can modify ... through all paths in the interrupt routine and adjust the 'de ...
    Alcoholics Anonymous Alcoholics Anonymous September 2003 Development
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... are disabled while a maskable interrupt is being serviced, to make ...
    Metalbrain Metalbrain September 2003 Development
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... return the processor to the interrupt recognition status it had ... as the end of an interrupt service routine. That fact ... re thinking that if an interrupt keeps occurring between the ' ... *next* instruction. That means no interrupt can happen until after the ...
    Alcoholics Anonymous Alcoholics Anonymous September 2003 Development
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... this higher priority device's interrupt service routine runs, none ... device know that its interrupt service routine is finished ... allow lower priority devices to interrupt? It watches the Z80 ... allow lower priority peripherals to interrupt again.

    ...
    Alcoholics Anonymous Alcoholics Anonymous September 2003 Development
  • Starstrike vs Death Star InterceptorThe two main Star Wars clones on the Spectrum in late '84-85. Which was better? I thought Starstrike was a little too slow, but having just played it…

    ... ruled, just like all other vector Starwars clones.
    GOC GOC October 2003 Games
  • Speccy gaming valuesHi, small mindprobing poll, not to be taken too seriously, but perhaps revealing something about WOS users' profile... Considering games that you p…

    ... with qaop-Space) :)
    2) Vector gfx(don't know... don ...
    bjohnnybravo bjohnnybravo October 2003 Games
  • Vic-20s ARE CRAP! (And a few other ramblings from 1984)There was a great rivalry between myself and some of my computer owning chums in the early/mid eighties. The thread title was a phrase I made good us…

    ... as well as line numbers, interrupt driven sprites and keyboard handling ...
    chaosmongers chaosmongers November 2003 Games
  • Just out of interest ...........viruses?Im quite large on a few music messageboards and help people out about being secure on the net and warning of viruses and stuff, and has it happens i …

    ... of code.

    The vector of tapes to pass virus ...
    ADJB ADJB November 2003 Sinclair Miscellaneous
  • in-game soundhas anybody an experience in writting beeper routines? i tried to code some sound fx but it sounds really horrible...

    ... -50 times and waiting for interrupt but it sounds as real ...
    Fikee Fikee November 2003 Development
  • in-game soundhas anybody an experience in writting beeper routines? i tried to code some sound fx but it sounds really horrible...

    ... -50 times and waiting for interrupt but it sounds as real ... /> So you wait for an interrupt and put out 5-10 ...
    Alcoholics Anonymous Alcoholics Anonymous November 2003 Development
  • Yet another TR-DOS questionI have yet another TR-DOS problem. I am using "LD C, command; CALL #3D13" to call the system functions. The problem is that TR-DOS automatically enab…

    Indeed. I initially thought it was using the #0038h interrupt for whatever purpose, but I've only now seen that the BetaDisk ROM's interrupt handler is "EI; RET" !

    :o ! (sound of slapped forehead)

    Wait a minute...
    GOC GOC November 2003 Development
  • Yet another TR-DOS questionI have yet another TR-DOS problem. I am using "LD C, command; CALL #3D13" to call the system functions. The problem is that TR-DOS automatically enab…

    Nope, the Beta sure seems to be want that IM1 mode. I've just tried to run a TR-DOS routine while in IM2 with the vector pointed to a "EI; RET" routine. It didn't work.

    Stupid idiotic #@$$!% TR-DOS !
    GOC GOC November 2003 Development
  • Yet another TR-DOS questionI have yet another TR-DOS problem. I am using "LD C, command; CALL #3D13" to call the system functions. The problem is that TR-DOS automatically enab…

    ... . Also check the normal IM0 vector.

    I would have ...
    cyborg cyborg November 2003 Development
<1…16171819202122…34>

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