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<1234567…34>
  • Interrupt driven code at overclocked pace....Is it possible for a MC coder to do a routine (i.e. interrupt music player, for within/during Basic)if he knows said machine is running at 400 percen…

    ... do a routine (i.e. interrupt music player, for within/during ...
    CKay CKay August 2004 Sinclair Miscellaneous
  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?

    How long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
    Philip Kendall Philip Kendall February 2005 Development
  • Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…

    ... on the data bus at interrupt time, thus meaning that IM2 ...
    Philip Kendall Philip Kendall March 2009 Hardware
  • Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…

    ... ensure that an IM 2 interrupt handler starts always at the ... ,20,21 and 22, each interrupt, and then 19,20,21 ...
    mcleod_ideafix mcleod_ideafix November 2014 Development
  • Interrupt routineI have been trying to create an interrupt routine for playing AY music in the background but cant seem to get anything working. I have a music rou…

    ... been trying to create an interrupt routine for playing AY music ... /> Does the bank switching mean interrupt routines cant be used?
    daveysludge daveysludge November 2016 Development
  • Games that cannot be completed due to bugs - the definitive listIt would be nice if the community of WoS compiled a list of all the games that are known to be impossible to complete due to bugs. Perhaps one day, a…

    Re: Firestorm

    Well, I thought ...
    Mr. Anonymous Mr. Anonymous September 2008 Games
  • Emulator compatibility with real SpectrumHi emulator programmers... Having spotted for the last 6 months that my iPAQ is still missing a Spectrum emulator I started typing last tuesday - an…

    ... 69888 tstates, issue a z80 interrupt and update the display (I ...
    Anders Anders September 2001 Emulators
  • Currah MicroSourceThis is an interesting one for the experts to mull over. I've got (and love) a MicroSource interface from Currah which consisted of an 8K ROM provid…

    ... /> I tried setting up an Interrupt 2 but MicroSource disables interrupts ...
    Chris Chris August 2001 Emulators
  • ANN: Spectaculator 2.5 available for downloadHi. I've just released a new version of Spectaculator, available from [url="http://www.spectaculator.com/"]http://www.spectaculator.com/[/url]. Hopef…

    ... Islands now load (was an interrupt frequency problem).
    Latest issue ...
    Jon Needle Jon Needle July 2002 Emulators
  • ZX Spin 0.4 available for Download.Standard Cut-n-Paste from the CSS post: If all goes well, I'll upload it to WOS on monday. ----------------------------------------- Okay, it's th…

    ... Block editor
    Fixed an interrupt table overwrite bug in the ...
    Dunny Dunny November 2002 Emulators
  • ANN: Write Spectrum Games in C with speclib121 Announcing the sprite pack C library for the z88dk C cross compiler available from: [url="http://justme895.tripod.com/main.htm"]http://justme895.tr…

    ... experiment in registering a C interrupt service routine. The final one ...
    Alcoholics Anonymous Alcoholics Anonymous January 2003 Announcements
  • 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.

    3. Use ...
    windenNTW windenNTW July 2003 Games
  • 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…

    ... with most of it, but interrupt-based timing routines are more ...
    b00mzi11a b00mzi11a September 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…

    ... after the CALL, occasionally an interrupt will get in exactly after ... is in IM1, the default interrupt code in the ROM will ... to IM2 and vector the interrupt to something harmless like a ...
    GOC GOC November 2003 Development
  • [NEW]: Spectaculator 6.0Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…

    ...
    to Cursor, Run until Interrupt, Run to End of Frame ...
    Jon Needle Jon Needle December 2003 Emulators
  • Fuse 0.6.2 and libspectrum 0.2.1 releasedThe Fuse team is pleased to announce the release of version 0.6.2 of the Free Unix Spectrum Emulator (Fuse) and associated utilities, as well as vers…

    ... by the user.
    * Improved interrupt handling in the Z80 core ...
    Philip Kendall Philip Kendall February 2004 Emulators
  • Finishing my Ragnar game...Hi all, Way back then, in my youth, I worked on a game for the Speccy called "Ragnar", which was a 3d isometric style mcoded game written from scrat…

    ... to work with the frame interrupt (i.e the raster line ... sound (and 4) perhaps also interrupt handling in general?). The help ...
    ekoman ekoman July 2004 Development
  • IM 2 interrupts and smooth scrolling - easy peasy!Okay, been fiddling around with IM 2 and have actually mastered (I think) how to use IM 2! Now I run my game Ragnar Revival in IM2 and use HALT to sy…

    ... start

    ;a test interrupt function located
    ;at 35002 ... Basic


    ;prepares interrupt handling
    prepint
    ld ...
    ekoman ekoman July 2004 Development
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ...
    * An interrupt cannot occur immediately after an ... * M1: 7 tstates: acknowledge interrupt and decrement SP.
    * ... * M1: 6 tstates: acknowledge interrupt and decrement SP.
    * ... a retriggered interrupt.

    Non-maskable interrupt (NMI)
    Philip Kendall Philip Kendall July 2004 Development
  • Game loop design?Having some thoughts on how to design the game loop and could do with some hints and tips from folks who have done it before! It's all about how to …

    ... />
    halt ;Wait for interrupt
    call drawsproffscr ;Draw offscreen ... synchronized with the IM2 interrupt when the sprite has ... be synchronized with the interrupt no matter if the ... the main game loop, interrupt synchronization and whether I ...
    ekoman ekoman July 2004 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ... /> RET


    ;prepares interrupt handling
    initIM2:

    robpearmain robpearmain August 2004 Development
  • Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …

    ... was only one kind of interrupt, the 50Hz screen refresh one ...
    Erlstoned Erlstoned August 2004 Development
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... /> It waits till the next interrupt (HALT) so that it is ... />
    RET

    ;PREPARES INTERRUPT HANDLING
    INITIM2:

    RETI

    ; **** END INTERRUPT ROUTINE ***


    WRITECHAR ...
    robpearmain robpearmain September 2004 Development
  • Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …

    ... TO 1

    Every Interrupt that's fired (1/50 ... /> RET


    ;PREPARES INTERRUPT HANDLING
    INITIM2:

    RETI


    ; **** END INTERRUPT ROUTINE ***


    WRITECHAR ...
    robpearmain robpearmain September 2004 Development
  • Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…

    When my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing.

    I know I need to wait about 14300T after interrupt but how can I tell if the ULA is now past the border and onto the screen?
    robpearmain robpearmain September 2004 Development
  • How can I see how long it took for IM2 to runHow can i see how many cycles it took for my interrupt routine to run, is there some way with Spectaculator debugger etc to see how long it has taken…

    How can i see how many cycles it took for my interrupt routine to run, is there some way with Spectaculator debugger etc to see how long it has taken from entering the IM2 routine to RETI
    robpearmain robpearmain October 2004 Development
<1234567…34>

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Related Threads

  • Interrupt driven code at overclocked pace....Is it possible for a MC coder to do a routine (i.e. interrupt music player, for within/during Basic)if he knows said machine is running at 400 percen…
  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
  • Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…
  • Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…
  • Interrupt routineI have been trying to create an interrupt routine for playing AY music in the background but cant seem to get anything working.<br /> <br /> I have…

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