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<1…13141516171819…34>
  • 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] ; ***********…

    ... the program counter is when im2 is called

    ... =FE
    IM 2 ; select IM2
    ei

    ... />
    ; 0FD00 - 0FDFCH Reserverd for IM2 Interrupts

    ORG 0FDFDH ...
    robpearmain robpearmain August 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] ; ***********…

    ... the program counter is when im2 is called

    ... =FE
    IM 2 ; select IM2
    ei

    ... />
    ; 0FD00 - 0FDFCH Reserverd for IM2 Interrupts

    ORG 0FDFDH ...
    robpearmain robpearmain August 2004 Development
  • Anyone fancy a "meet up" in September?I have a weekend off in September, 25th/26th September, the only one until Xmas, and am postng this invite on a few boards that I post on. I live in…

    I'll pick you [I]both[/I] up. If I'm not up to my neck in snow by then. :lol:

    [ This Message was edited by: Malcolm Hope on 2004-08-27 18:15 ]
    Malc74 Malc74 August 2004 Sinclair Miscellaneous
  • 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 …

    ... any snippets?
    (I have IM2 working fine, I guess you ... new screen ready

    IM2
    a) Is FLAG set ...
    robpearmain robpearmain September 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 …

    ... =FE
    IM 2 ; SELECT IM2
    EI

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

    ORG 0FDFDH ...
    robpearmain robpearmain September 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 …

    ... ", or flicker. I have used IM2 so that as soon as ... =FE
    IM 2 ; SELECT IM2
    EI

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

    ORG 0FDFDH ...
    robpearmain robpearmain September 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 …

    ... =FE
    IM 2 ; SELECT IM2
    EI

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

    ORG 0FDFDH ...
    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…

    ... />
    I have worked out IM2 interrupts, so basically that must ...
    robpearmain robpearmain September 2004 Development
  • OT: Where should I go on Holiday? Tell me about where you live.Right, I need a holiday, I haven't been away for 2 and a half years and Im getting fed up of Burnley.Trouble is I don't know where to go. Seening as …

    chaosmongers could sell snow to the eskimos...
    rich_chandler rich_chandler September 2004 Sinclair Miscellaneous
  • Sparky eZX-BASIC Project in need of FPGA ExpertYou probably are not familiar with this project, but it is a computer system based on Zilog's new eZ80 chip and the OS is a superset of ZX BASIC. Ju…

    ... IRQ structure is more like IM2 and IRQ routines are completely ...
    Sparky Sparky October 2004 Sinclair Miscellaneous
  • 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…

    Assuming the debugger has breakpoints and T-States set a breakpoint at the start and end of the IM2 vector - the difference in T-States will give you the number of cycles it took to complete.
    cyborg cyborg October 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…

    Hi,

    Ok, worked out using Spectaculator and 2 breakpoints,

    My function takes 26622 TStates

    How many TStates are in 1/50th, i.e. one IM2 update?
    robpearmain robpearmain October 2004 Development
  • The Spectrum is a Piece of ShitHow can you all stand there and defend a computer that was ABSOLUTELY RUBBISH even back in 1982, compared to classics like the Atari 8-Bit, Commodore…

    ... ' kind of colour. Luckily the rain held off. The paint's ...
    Lee Tonks Lee Tonks October 2004 Sinclair Miscellaneous
  • The Spectrum is a Piece of ShitHow can you all stand there and defend a computer that was ABSOLUTELY RUBBISH even back in 1982, compared to classics like the Atari 8-Bit, Commodore…

    ... ' kind of colour. Luckily the rain held off. The paint's ...
    beebul beebul October 2004 Sinclair Miscellaneous
  • Compressed Loading ScreensHi everybody From my speccy memories I could swear I could remember games with loading screens that took less than normal time to load. But up until…

    ... use DI so I have IM2 to make an intrupt. The ... keyboardscan is done by IM2 through the normal ROM-routine ...
    Dr BEEP Dr BEEP November 2004 Sinclair Miscellaneous
  • OT: RIP Fred DibnahCompletely off topic, but this news really upset me because Fred was such an enthusiast for his engineering, especially Victorian engineering. [url=…

    ... and he looked right as rain.

    Strange what can ...
    Tobo Tobo November 2004 Sinclair Miscellaneous
  • OT: World Exclusive - US Election. I call Kerry.Yes folks, here it is another WOS world exclusive, John Kerry has won the US election! it's been a close race, but renouned one man news angency Sha…

    ... be taken out into the snow and left to die.
    Malc74 Malc74 November 2004 Sinclair Miscellaneous
  • Band Aid 20What an acheivment!!! I didn't think anything could be worse than Band Aid II, but this is really the biggest pile of monkey puke to grace the airw…

    "There will be no snow in Africa at Christmas....No ...
    Cornervizion Cornervizion November 2004 Sinclair Miscellaneous
  • Does the +2a MIC socket connect to the datacorder?The subject says it all: Would I be able to use the +2a MIC socket (in conjunction with a proper cable and WinTZX or so) to save stuff from my PC ont…

    Ummm......Sorry to rain on your parade but I ...
    itsallgood itsallgood November 2004 Sinclair Miscellaneous
  • Why wasn't there a Madness game?Am I the only person who thinks there should have been a Spectrum game based around the band Madness? It just seems so perfect, really 1980s, really…

    ... " and "The Sun and The Rain" spring to mind. The best ...
    Spector Spector December 2004 Games
  • For Christmas I want.... a Llama .. what do you want?

    ... . Then I'd like to snow spray The Mock Turlte with ...
    thx1138 thx1138 December 2004 Sinclair Miscellaneous
  • For Christmas I want.... a Llama .. what do you want?

    ... . Then I'd like to snow spray The Mock Turlte with ...
    b00mzi11a b00mzi11a December 2004 Sinclair Miscellaneous
  • Anyone instant messaging? MSN or Yahoo.I dunno quite how it happened but I instant message both THX and Cyborg on a pretty regular basis. I was just wondering if any other of the wos regul…

    ... />


    Frosty the Snow Man

    Frosty the ... ,
    Over the hills of snow.

    Frosty the snowman ... "Stop!"
    For Frosty the snow man
    had to hurry ... ,
    Over the hills of snow.



    [ This ...
    CKay CKay December 2004 Sinclair Miscellaneous
  • MemoryI am writing a game for the Spectrum and need to store a lot of map data. What is the lowest address I can start to store the data at ?

    ... interrupts or provide your own IM2 routine.
    gasman gasman December 2004 Development
  • CPC 464 plus - technical help please.I set up my CPC464plus today. With a cartride inserted, it works. Without a cartridge inserted, it displays just a green screen. I have one cart, …

    ... the person who discovered the IM2 bug, for instance), so I ...
    AndyC AndyC January 2005 Sinclair Miscellaneous
  • Who the fcuk is Paul McKenna??Disappointing development: [url="http://www.worldofspectrum.org/showwrap.cgi?permit=houses/McKennaPaul.pmt"]http://www.worldofspectrum.org/showwrap.…

    I love the spanish blue sky...

    But everyone here is worried, no rain in 3 months!
    cid cid February 2005 Games
  • Who the fcuk is Paul McKenna??Disappointing development: [url="http://www.worldofspectrum.org/showwrap.cgi?permit=houses/McKennaPaul.pmt"]http://www.worldofspectrum.org/showwrap.…

    [quote]
    On 2005-02-16 13:07, cid wrote:
    But everyone here is worried, no rain in 3 months!
    [/quote]

    Sorry about that! We're getting it all here. How embarrassing. :oops:
    monty.mole monty.mole February 2005 Games
  • 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…

    ... this.

    When in IM2 mode the value in the ...
    cyborg cyborg February 2005 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…

    ... br /> [/quote]

    In IM2, the interrupting peripheral supplies a ... is not an im2 aware peripheral -- when in im2, it still ... whenever an interrupt occurs in im2.

    [quote]
    ... PIO chip which uses two im2 vectors; the MB02 interface ...
    Alcoholics Anonymous Alcoholics Anonymous February 2005 Development
  • Suggestions for games to test emulators?I'm going to be doing a comparision of a few different emulators, and was wondering if anyone had good suggestions of games to use as a 'benchmark' t…

    ... /> Not to mention the ULA snow effect it uses... You'll ...
    Dunny Dunny February 2005 Games
<1…13141516171819…34>

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