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  • Restore Registers Returning to BASICI should really know this, but I've not written code that requires a return to BASIC for a loooong time. What registers need to be preserved / resto…

    ... /> 1. Save SP and the stack (or just don't mess ... SP (to point at original stack)
    2. LD IY,$5C3A ...
    Alcoholics Anonymous Alcoholics Anonymous July 2006 Development
  • Restore Registers Returning to BASICI should really know this, but I've not written code that requires a return to BASIC for a loooong time. What registers need to be preserved / resto…

    ... SP (to point at original stack)
    2. LD IY,$5C3A ... SP (to point at original stack)
    LD IY,$5C3A
    rich_chandler rich_chandler July 2006 Development
  • Restore Registers Returning to BASICI should really know this, but I've not written code that requires a return to BASIC for a loooong time. What registers need to be preserved / resto…

    ... SP (to point at original stack)
    LD IY,$5C3A
    icabod icabod July 2006 Development
  • What is the rarest sinclair item u have ?For me, its a Sinclair PC200 boxed working and complete, has anyone any idea what its worth ? I am going to be selling it along with the rest of my …

    [quote=ghbearman]oooh I'll have one! can I pm you my address?[/quote]

    As soon as I can dig 'em out from underneath the stack of Miremare boxes I just knocked over trying to reach one...

    ;)
    andrew_rollings andrew_rollings July 2006 Sinclair Miscellaneous
  • Who do you listen to most?Without wanting too many people replying `the wife`, what music do you usually gravitate towards? I listen mostly to the Chilli Peppers, System of a…

    ... Temple Pilots, Aerosmith, Testament, Tiamat, Smashing Pumpkins, Blind Melon, Clapton, Knopfler ...
    Arjun Arjun July 2006 Chit chat
  • Detect if program was loaded from tape or microdriveHow (if at all) can a BASIC program detect if it was loaded from tape or microdrive? This can be helpful to then load the screen or more machine code…

    ... you could check the Z80 stack to see if it's ...
    DEATH DEATH July 2006 Development
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... some code just after the stack, and in the debugger the ... stack got disassembled. I wanted to ... to the data on the stack it disassembled into my own ... in the disassembly of the stack, so I couldn't select ...
    icabod icabod July 2006 Emulators
  • Bah, Spectrum+ has diedBah. My Spectrum+ appears to have died. On power up, the 'paper' part of the screen goes black (and you see the faint red lines that you normally se…

    Almost certainly the upper memory block "losing" the stack. What issue is the board?
    DEATH DEATH July 2006 Hardware
  • Extended Microdrive FormatterHello all, After a few months on a steep learning curve, some heavy duty reading and plenty of trial and error I?ve written an extended microdrive f…

    ... the code will overwrite the stack and crash the system:
    Jonathan Harston Jonathan Harston July 2006 Development
  • Perfect Dark (N64) - best FPS ever?Since we're talking about Half-Life 2 on this board, I thought I'd mention Perfect Dark, the best first person shooter ever. Don't believe me? Hardly…

    ... somehow you can carry a stack of weapons and ammo, and ...
    ewgf ewgf July 2006 Sinclair Miscellaneous
  • Perfect Dark (N64) - best FPS ever?Since we're talking about Half-Life 2 on this board, I thought I'd mention Perfect Dark, the best first person shooter ever. Don't believe me? Hardly…

    ... somehow you can carry a stack of weapons and ammo, and ...
    The Starglider The Starglider August 2006 Sinclair Miscellaneous
  • Conman the BarbaricHello, first-time poster but old-time Speccy owner. I had this demo of Conman at the time...in fact I'm still got it, in my big box of Spectrum game…

    Aha, I'm getting somewhere again now...I'd tried smashing that certain musical object before but when the Pixie swooped down I thought that was the wrong thing to do and just reloaded...I needed your hint to reassurance me I was MEANT to do it, heh...
    DamonD DamonD August 2006 Games
  • for a stupid: what?s NMI?erhm, yes, I?m not familiar with it... :rolleyes: I know the function of a hardware ?snapshot? button from Didaktik M/Kompakt, but I?m not familiar…

    ... the current PC on the stack, clear IFF1 and then set ...
    Philip Kendall Philip Kendall August 2006 Hardware
  • for a stupid: what?s NMI?erhm, yes, I?m not familiar with it... :rolleyes: I know the function of a hardware ?snapshot? button from Didaktik M/Kompakt, but I?m not familiar…

    ... [/B] register is saved to stack,
    [*][B]IFF1[/B] state ...
    Marcelo Marcelo August 2006 Hardware
  • In Machine Code, what is the quickest way to sort bytes?I am playing around with some ordering of sprites, where I want to order them by vertical position. I used some Rodnay Zaks code to order some bytes…

    ... information is stored in the stack. Quicksort (even the misnomered iterative ... store recursive information on the stack which in worst case is ...
    Alcoholics Anonymous Alcoholics Anonymous August 2006 Development
  • Spectaculator QuestionsI've been messing around with this great emulator, and was surprised how easy it was for me to load a game from minidisc into Spectaculator as if it …

    ... in 2-3 segments, put stack in screen, save all. Then ...
    piters piters August 2006 Emulators
  • If you were a richman...Have you ever wondered what would you do with your Spectrum hobby if you were a millionaire and had a lot of money to spend? Would you hire some Russ…

    ... I think they're rather smashing (and the winners seemed to ...
    icabod icabod August 2006 Sinclair Miscellaneous
  • Pimp my code...Erm, this is just the result of a mental exercise - I wanted to repeatedly display a UDG but decided against using a ROM routine and UDGs! Any sugges…

    ... -duper-fast by using the stack.
    Stick SP to point ...
    icabod icabod August 2006 Development
  • Pimp my code...Erm, this is just the result of a mental exercise - I wanted to repeatedly display a UDG but decided against using a ROM routine and UDGs! Any sugges…

    ... by 2048.

    The stack thing as icabod suggests might ... but I hate using the stack for things like this because ...
    Alcoholics Anonymous Alcoholics Anonymous August 2006 Development
  • Pimp my code...Erm, this is just the result of a mental exercise - I wanted to repeatedly display a UDG but decided against using a ROM routine and UDGs! Any sugges…

    ... but I hate using the stack for things like this because ... the interrupts when using the stack.
    In a recent intro ... cc6, w00t!) I used the stack extensively for storing data... I ...
    icabod icabod August 2006 Development
  • Pimp my code...Erm, this is just the result of a mental exercise - I wanted to repeatedly display a UDG but decided against using a ROM routine and UDGs! Any sugges…

    ... the interrupts when using the stack.
    In a recent intro ... cc6, w00t!) I used the stack extensively for storing data... I ... /> No interrupts at all, no stack trash!
    Dr BEEP Dr BEEP August 2006 Development
  • Old Radio 1 recordingsI have this nostalgic urge to listen to old recordings of Radio 1 from the 80's - anyone know if any are downloadable? Would especially be interested…

    #Tell us what the time is!

    Done in David Bowie style for Steve Wright in the afternoon.

    Smashing.
    Daren Daren August 2006 Chit chat
  • Screen LoaderCouple days ago i find very interesting loader routine in ex Yugoslavia magazine "Svet Kompjutera" from january 1987. Authors of article, calls this …

    ... you load writes over the stack, you cannot return correctly, so ...
    Dr BEEP Dr BEEP August 2006 Games
  • CLEAR does not RESTORE the DATA pointer??According to the Spectrum manual, one of the things that a CLEAR command does RESTORE the DATA pointer. Either it doesn't actually do this, or some…

    ... /> 5. Clears the GO SUB stack and puts it at the ...
    trellis trellis September 2006 Sinclair Basic
  • PS3 Launch Delayed Till March 2007 in Europe and AusAnyone whos been waiting for november will have to wait even longer now unless they live in the U.S of Japan

    ... not having to keep a stack of discs next to the ...
    ewgf ewgf September 2006 Chit chat
  • Wanted - Dun Darach & MarsportI've been trying for ages to cop these off eBay, but they never come up. Only once did I see a seller offering about 15 games and I bidded just to ge…

    ... my spectrums are in a stack of boxes on the floor ...
    Ian Hamilton Ian Hamilton September 2006 Wanted
  • TAP conversion project?I was wondering if there's any concerted effort to produce TAP versions of games only available in TZX or Z80/SNA/SLT format? Or are snapshots consid…

    ... .

    After setting the stack pointer, it sets A = $00 ... it disables interrupts, sets the stack pointer, changes to page 7 ...
    StuBruise StuBruise September 2006 Games
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... ; BY SAVING LOW BYTE ON STACK.
    LDA ($30),Y ; THEN ... /> PLA ;PULL LOW BYTE FROM STACK
    INY ; AND STORE IT ...
    JamesD JamesD September 2006 Sinclair Miscellaneous
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