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Search Again :: Adv Search 154 results in 0.000s
<123456>
  • 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…

    ... /> pop hl
    ei
    reti

    start
    call ...
    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] ; ***********…

    ... AF

    ei
    reti

    Start:

    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 …

    ... AF

    EI
    RETI

    ; **** END INTERRUPT ROUTINE ...
    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 …

    ... />
    EI


    RETI


    ; **** END INTERRUPT ...
    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
  • SP and IM2 woesI have a function that writes the backbuffer to the screen using the method by which SP is stored, I "POP" a load of registers and then chnge SP to t…

    ... is)

    EI
    RETI

    If before I ...
    robpearmain robpearmain November 2009 Development
  • 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 …

    ... ,237,77 which is EI,RETI command - end interrupt
    ;each ...
    Ralf Ralf November 2009 Development
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how easy it actually is. (Actually I've already published this one some time ago, but this time the source is ...
    Timmy Timmy January 2012 Development
  • 28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…

    ... /> POP BC
    EI
    RETI

    HIRON LD A ...
    AMW AMW April 2012 Development
  • Fuse for Mac OS X 1.1.1 ReleasedA new version of Fuse for Mac OS X has been released at the dedicated sourceforge project and shortly here on WoS: [url]http://sourceforge.net/proje…

    ... ]
    [*] Disassemble ED 4D as RETI (Simon Owen).
    [*] Add IM ...
    Fred Fred June 2013 Emulators
  • z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…

    ... -enable interrupts before returning.
    reti ; done.
    ret

    slenkar slenkar October 2013 Development
  • Interupt service routinehas anyone set up a interupt service routing with pasmo? this one I tried resets the speccy EDIt- I placed the code after the END directive, I fi…

    ... -enable interrupts before returning.
    reti ; done.
    org 65024
    slenkar slenkar April 2017 Development
  • ZEsarUX 8.1 Beta 2Hi! I have uploaded a new ZEsarUX 8.1 Beta 2 version! You can download it from https://github.com/chernandezba/zesarux/releases/tag/8.1-161220…

    ... open a directory
    Fixed RETI behaviour
    Fixed Real Joystick ...
    chernandezba chernandezba December 2019 Emulators
  • ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…

    ... it's IM1
    Fixed RETI behaviour
    Fixed Real Joystick ...
    chernandezba chernandezba February 2020 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…

    ... , hitherto unknown, behavior of the RETI and RETN instructions.

    RETI and RETN instructions defer the ... , unlike EI, a sequence of RETI/RETN instructions will not prevent ...
    rich_chandler rich_chandler April 2022 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, …

    ...
    . (to be correct use RETI, but ROM uses RET also ...
    Dr BEEP Dr BEEP August 2001 Sinclair Miscellaneous
  • 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…

    ... /> pop af
    ei
    reti

    The setup code ... interrupts. ISRs end with a 'reti' instead of a 'ret' instruction ...
    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…

    [quote]
    ei
    reti
    [/quote]

    AFAIK ... times the stack may collapse. reti itself is equivalent to ei ...
    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…

    ... Robinson:

    "
    RETI
    Description. Pop the program ... routine. That fact makes RETI particularly useful in nesting ... between the 'ei' and 'reti' instructions, the return address ... be popped off by 'reti'. Interrupts keep happening, pushing ...
    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…

    I guess my information must be wrong. In that case, what's the adventage of using reti instead of ret? reti takes 2 bytes, and ret only 1.
    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…

    ... bus to see if a 'reti' instruction is executed. When it ... sees 'reti' it knows its ISR is ... you used 'ret' instead of 'reti' to terminate the ISR with ... wait in vain for a 'reti' instruction that never gets executed ...
    Alcoholics Anonymous Alcoholics Anonymous September 2003 Development
  • VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…

    ... that simply does an "ei; reti". This way the instruction following ...
    Alcoholics Anonymous Alcoholics Anonymous May 2004 Development
  • VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…

    ... EI and 8 for the RETI = at least 31 cycles (which ...
    Philip Kendall Philip Kendall May 2004 Development
  • VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…

    ... EI and 8 for the RETI = at least 31 cycles (which ...
    Alcoholics Anonymous Alcoholics Anonymous May 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…

    ... ]
    This allows for a RETI instruction after EI. Another point ... retriggered interrupt.
    [/quote]
    RETI is the instruction to use ...
    Fraser Fraser 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…

    ... retriggered interrupt.
    [/quote]
    RETI is the instruction to use ... smallest interrupt routine possible ("EI;RETI") though an awful lot of ...
    Alcoholics Anonymous Alcoholics Anonymous 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…

    ... plain Z80, RET and RETI works exactly the same, ... except RETI is longer and slower, ... reason for using the RETI instruction is if you ... has ended upon executing the RETI.
    I think ... the ULA generated interrupt by RETI.

    [url ...
    Mikie Mikie 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…

    ... has ended upon executing the RETI.
    I think this concept ... the ULA generated interrupt by RETI.
    [/quote]

    I ... means terminating an ISR with "RETI" mainly because you have no ... their computer. As you say, "RETI" is only essential for IM2 ...
    Alcoholics Anonymous Alcoholics Anonymous 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…

    ... interrupt state is maintained by RETI copying IFF2 back to IFF1 ...
    Woody Woody July 2004 Development
<123456>

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