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  • Still looking for a LMT Computers SPD1 Spectrum Disc ControllerHi All, Looking for a LMT Computers SPD1 Spectrum Disc Controller or possible contacts for ex LMT Computers employees. I worked there writing the co…

    ... code which copied the entire memory plus cpu registers to disk ... were the days... POP this , PUSH that, ADD HL, DEC BC ...
    bigfathairybiker bigfathairybiker March 2012 Hardware
  • Hidden Spectrum emulator discovered in Goldeneye (N64)Commence ewgf's mind being blown in 3...2...1... [url]http://news.ycombinator.com/item?id=3770288[/url] [url]http://www.therwp.com/forums/showthread…

    ... by hackers and cheats (the push button codes for the cheats ... 16kb of the Spectrum's memory. On the original Spectrum, the ...
    ewgf ewgf March 2012 Sinclair Miscellaneous
  • Multicolour demo using z88dk + BIFROST* (+source)This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/sho…

    ... = char **string_ptr + 1

    push hl ; save start of token ...
    push bc ; save char **string_ptr + 1 ... a different screen configuration or memory map.

    The config ...
    Alcoholics Anonymous Alcoholics Anonymous March 2012 Development
  • Help pleeease "Proving Emulator OpCode flags are correct"So I had a cunning plan... I wanted to write a test harness for Emulators that could "prove" that all opcode flags were correct. I wanted something m…

    ... poking the value in three memory addresses takes 6 seconds. Multiply ... /> PUSH HL
    PUSH HL
    PUSH HL
    PUSH HL
    PUSH HL
    PUSH ... a while...

    The memory between 65024 and 65535 will ...
    Stefan Drissen Stefan Drissen April 2012 Emulators
  • Matching calls and returnsHi all, A pretty fundamental question here that I probably should have sorted by now. I've noticed how much the stack has built out in my current g…

    ... . Go to that address in memory and check the previous three ... that the value is a PUSH that is never POPPED. Again ...
    BloodBaz BloodBaz April 2012 Development
  • Matching calls and returnsHi all, A pretty fundamental question here that I probably should have sorted by now. I've noticed how much the stack has built out in my current g…

    ... . Go to that address in memory and check the previous three ... that the value is a PUSH that is never POPPED. Again ...
    R-Tape R-Tape April 2012 Development
  • The most powerful 8-bit machine, and CPU?Further to the discussion in: [url]http://www.worldofspectrum.org/forums/newreply.php?do=newreply&p=621787[/url] What actually is the best 8-bit ma…

    ... sort of thing). You can push or pull multiple items on ... instruction, allowing you to shift memory about quite nippily.

    Jmk Jmk April 2012 Chit chat
  • z88dk vs. sdccI've just read this article (in Spanish) [url]http://www.cpcmania.com/index2.asp?urldest=Docs/Programming/SDCC_vs_z88dk_Comparando_tama%F1o_y_velocid…

    ...
    [code]
    push bc
    ... ; no memory error detected
    jp ... pop bc
    ... ; another no memory error
    jp nc, stdio_error_enomem_zc ... separate code into different memory areas or banks and ...
    Alcoholics Anonymous Alcoholics Anonymous May 2012 Development
  • In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…

    ... two code block in the memory manager which prepare a ... /> POP IX

    PUSH BC ; place the return address ... /> INC SP

    PUSH HL
    POP IX ; the ... IX restored

    PUSH DE ; the return address restored ...
    Raydac Raydac June 2012 Development
  • In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…

    ... doesn't waste time to PUSH/POP disposable data all the ... two code block in the memory manager which prepare a method ...
    Einar Saukas Einar Saukas June 2012 Development
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ... the attributes are contiguous in memory, so you don't have ... =current print position
    PUSH DE PUSH DE ; Save print position for ... />
    ; Set attribute
    ; -------------
    PUSH HL ; Save print position
    Jonathan Harston Jonathan Harston June 2012 Development
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ... the attributes are contiguous in memory, so you don't ... current print position
    PUSH DE PUSH DE ; Save print ... br /> ; Set attribute
    ; -------------
    PUSH HL ; Save print position
    push de and pop hl, but ...
    Baggers Baggers June 2012 Development
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ... constants marker
    push bc
    push bc
    ld ... stdio_num2char
    scf
    push af ; digit onto stack
    push hl
    push bc
    call malloc ; get bc bytes of memory ... to write n bytes to memory
    ; used to ...
    Alcoholics Anonymous Alcoholics Anonymous June 2012 Development
  • BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…

    ... 28-wide if I really push the timing with everything unrolled ... a linear buffer. Using LD/PUSH it might even be possible ... , except the processor time and memory that gets swallowed up. In ... a ZX81.

    One memory-saving trick is to prepare ...
    joefish joefish July 2012 Brand new software
  • Saving space using procedural graphicsAfter spending several hours playing around with various packers to squash the Alien8 test screen$ it occured to me that maybe bigger space savings c…

    ... /> ld ixl,41
    l40021: push de
    call l40044
    memory ok.
    Dr BEEP Dr BEEP July 2012 Development
  • 64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…

    ... -255)
    ;it is memory area 65024-65281 filled with ... br />
    PUSH IY ;copy MV11
    PUSH IX ;copy MV10 ...
    PUSH AF ;copy MV9 ...
    PUSH BC ;copy MV8 ...
    Ralf Ralf July 2012 Development
  • 64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…

    ... -255)
    ;it is memory area 65024-65281 filled with ... br />
    PUSH IY ;copy MV11
    PUSH IX ;copy MV10 ...
    PUSH AF ;copy MV9 ...
    PUSH BC ;copy MV8 ...
    Ralf Ralf July 2012 Development
  • The Top 25 Modern PC GamesIn the thread [url]http://www.worldofspectrum.org/forums/showthread.php?t=40451[/url] , Ivanzx asks do you prefer modern or 'classic' era Spectrum g…

    ... />
    At a push though, I may boot up ... still problems, then test the memory. To do this, download ... check all of your memory, but allows time for ... If MEMTEST86 does show any memory errors, then try swappng ... out the memory sticks (if you have ...
    ewgf ewgf August 2012 Chit chat
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Latest Posts

  • I am currently watching.....
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  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
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