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<1234567…34>
  • 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…

    ... a good tutorial on using interrupts? As soon as someone mentions ...
    b00mzi11a b00mzi11a September 2003 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…

    ... 1 and enable
    ei ;interrupts. Jump to 0056 in ROM ...
    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…

    ... 3.54 MHz, so interrupts are still generated every ... interrupt routines; see the retriggered interrupts section below.

    interrupts were enabled beforehand.
    ... 'nnnn'.

    Retriggered interrupts

    If you ...
    Philip Kendall Philip Kendall July 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 …

    ... and I want to use interrupts to measure time, draw the ... keyboard etc. What kinds of interrupts are there?

    At ... they were talking about maskable interrupts vs NMI. Are those generated ...
    Erlstoned Erlstoned August 2004 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... a little confused regarding the interrupts on the Spectrum. If I ... />
    I suspect that the interrupts does for example keyboard scanning ...
    Rickard Rickard May 2007 Development
  • InterruptsI need help emulating interrupts. My z80 core currently emulates all un-prefixed opcodes and the CB opcodes. I thought I would start on emulating co…

    I need help emulating interrupts.

    My z80 core ... to start - my understanding of interrupts is not great (having never ...
    MadDoc MadDoc July 2008 Emulators
  • Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …

    ... 'm fighting to understand how interrupts code handling works

    ;each interrupt automatically disables interrupts, so they must be enabled ...
    Ralf Ralf November 2009 Development
  • Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…

    ... explain in simple terms how interrupts work on the Speccy ... via the ULA? Are Speccy interrupts per-frame, can you schedule ... Are there different types of interrupts that can instantly jump to ... hearing stuff about non-maskable-interrupts in the case of resetting ...
    takapa takapa June 2012 Development
  • Interrupts, 16k Spectrums and snowI'm writing something for the 16k Spectrum and I want to use interrupts. The avilable documentation doesn't seem clear enough for me to figure out ho…

    ... and I want to use interrupts. The avilable documentation doesn't ... can I do my own interrupts on a 16k machine? Is ...
    evilpaul evilpaul August 2017 Development
  • playing ay music using interruptsi seem to remember there is a way to play ay music using interrupts. (i.e. play music while you are typing, editing listings, running another program…

    i seem to remember there is a way to play ay music using interrupts. (i.e. play music while you are typing, editing listings, running another program, etc, in the background.) what is the simplest way of doing this?
    digital digital September 2018 Development
  • Which Emulator has a menu option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT?Which Emulator has a menu option / debugger option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT? I tried SpecEmu and Fuse, b…

    Which Emulator has a menu option / debugger option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT?

    I tried SpecEmu and Fuse, but I can not find a option for doing this in their debugger.
    Luzie Luzie June 2021 Emulators
  • New discovery on Z80 interrupts.This is to announce the discovery of a new, hitherto unknown, behavior of the RETI and RETN instructions. As everyone knows, the maskable interrup…

    ... interrupted immediately after re-enabling interrupts if the /INT line is ...
    rich_chandler rich_chandler April 2022 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…

    ... Interrupt 2 but MicroSource disables interrupts during the compile.

    Chris Chris August 2001 Emulators
  • Best way to codeHi, I've been using Zeus Assembler to code MC programs so far. Nothing fancy just the odd scroll left or animation stuff. Wot I'd like to know is, …

    ... interested in knowing more about interrupts, ZX Specy addresses, masking, and ...
    Arjun Arjun August 2001 Sinclair Miscellaneous
  • NEW INTERFACE FOR ZX SPECTRUM!!Hi all zx-maniax! Here is a letter from Polish inventor, Yarek Adamski. He constructed a new brilliant interface for ZX SPECTRUM. Ready carrefuly i…

    ... Mouse).
    Also can generate interrupts on every screen line as ...
    Yerz Yerz July 2003 Sinclair Miscellaneous
  • 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 …

    ... , SID-Voice uses a CPU interrupts to produce a square tone ... -Buzzer uses an external CPU interrupts to write values in the ... ? Maybe we would get less interrupts per second, but couldn't ...
    b00mzi11a b00mzi11a August 2003 Sinclair Miscellaneous
  • Tough paging questionOK... Take this: 1. We have a program compiled and run from within GENS under a Pentagon 128K environment. 2. The program works perfectly. 3. We sav…

    ... use the ROM.
    8. Interrupts are disabled all troughout the ...
    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…

    ... TR-DOS automatically enables the interrupts after it exits. Even if ...
    GOC GOC November 2003 Development
  • Z80 processor question...Suppose we fill the entire $0000-$ffff memory range with $ed. What will the processor do ? I suppose it will get locked, but will it still respond to…

    Suppose we fill the entire $0000-$ffff memory range with $ed. What will the processor do ? I suppose it will get locked, but will it still respond to hardware interrupts ?
    GOC GOC 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] ; ***********…

    ... 1 and enable
    ei ;interrupts. Jump to 0056 in ROM ... /> ; 0FD00 - 0FDFCH Reserverd for IM2 Interrupts

    ORG 0FDFDH
    robpearmain robpearmain 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 …

    ... previous thread to use IM2 interrupts to do the moving of ... /> ; 0FD00 - 0FDFCH RESERVERD FOR IM2 INTERRUPTS

    ORG 0FDFDH
    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 …

    ... /> ; 0FD00 - 0FDFCH RESERVERD FOR IM2 INTERRUPTS

    ORG 0FDFDH
    robpearmain robpearmain September 2004 Development
  • Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…

    ... to do with screen refeshing, interrupts and HALT command, but I ...
    Ralf Ralf October 2004 Development
  • InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…

    Can someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as possible to keep it out the way. From what I've read there is restrictions on where it can go. I am also read ...
    Mr Millside Mr Millside February 2005 Development
  • Fastest way to write something to screen$Hi, I just got pasmo.exe and start playing with attr scrolling, well, not scrolling, just write different values to a block and see if I can introdu…

    ... /> NOTE: This must run with interrupts disabled
    [code]
    ; ----- SFILL ...
    AE.Vasconcelos AE.Vasconcelos April 2005 Development
  • How many T-states takes PUSH DE ?Hi. Just a quick one. According to z80.info docs, a PUSH DE should take 11 T-States to be executed. But WHAT if SP is pointing to Contended Memory,…

    ... test program is running with interrupts disabled but that shouldn't ...
    AE.Vasconcelos AE.Vasconcelos April 2005 Development
  • .AY - how to create themI wonder - how would I go about creating an .AY file (music) from a game? I understand that once I have all the necessary pieces (the player, the mus…

    ... most likely quite isolated (no interrupts, nothing happening while the music ...
    pepak pepak August 2005 Sinclair Miscellaneous
  • ANN: Sam Revival issue 13 out now! [Sam CoupIssue 13 of 'Sam Revival' magazine is now out! Kicking off issue 13 of Sam Revival is a 14 page news section to give a lowdown on what's happening i…

    ... for palette changes using line interrupts which is answered with a ...
    Quazar Quazar December 2005 Announcements
  • Sam Revival Back Issue Bonanza!As a special offer throughout March, i'm giving 25% off back issues of Sam Revival magazine. So if you are looking to fill in gaps in your collection…

    ... Can
    * Machine Code - keyboard, interrupts, double buffering
    * Part One ...
    Quazar Quazar March 2007 Announcements
  • Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …

    ... RAM

    di ; disable interrupts

    ; copy BASIC ROM ...
    chev chev March 2007 Emulators
<1234567…34>

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Related Threads

  • 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…
  • 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…
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome.<br /> <br /> Notably:<br /> <br /> * How long does the 48K ULA hold /I…
  • 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 …
  • InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
  • InterruptsI need help emulating interrupts.<br /> <br /> My z80 core currently emulates all un-prefixed opcodes and the CB opcodes. I thought I would start on …
  • Interrupts - been a while !Not sure if this is the right place for this (1st post on WOS, but been a speccy user since Dec'84 :-o (yes I am that old ! :p) ),<br /> <br /> But …
  • Need help with interrupts againI'm fighting to understand how interrupts code handling works<br /> <br /> I'm trying to set my simple own interrupt routine, as I don't want to be d…
  • Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…

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