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<1…18192021222324…34>
  • IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…

    ... entered
    with the memory configured as illustrated below ( ... at the bottom of memory in the address range ... top of
    memory is page 0 and ... br /> the top of memory, the stack held somewhere ... the bottom of
    memory (000h...3FFFh). This configuration ...
    The_Bert The_Bert October 2013 Sinclair Basic
  • Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…

    ... put a buffer in contended memory of the Spectrum 48K either ... LDI is still preferable to PUSH though, like when you're ...
    Einar Saukas Einar Saukas October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... 0x1d34
    f_l_and_s:
    push hl ; stack pointer
    ... ; variable address to temporary memory area
    fwait ; ...
    two_p_1:
    push af ; stack first parameter< ... number
    push bc ; stack it
    push hl ; ...
    chev chev October 2013 Development
  • 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…

    ... macro "M_BEGIN/END_ISR_LIGHT" to insert PUSH/POPs into the C code ...

    push af
    push bc
    push de
    push hl

    Also keep the memory map in mind -- this is ...
    Alcoholics Anonymous Alcoholics Anonymous October 2013 Development
  • 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…

    ...

    push af
    push bc
    push de
    push hl
    memory map if the program is ... -trivial. Here's an example memory map:

    [code]< ... requires some data structures in memory. I just placed those at ...
    Alcoholics Anonymous Alcoholics Anonymous October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... push hl ; stack pointer
    call test_room ; check available memory ... pointers:
    push af ; stack AF
    push hl ; and ... hl ; the stack
    push hl ; stack stkend
    close_2:
    push hl ; stack stream data ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... /> push bc ; stack position
    push hl ... calc memory
    push bc ; push the ...
    chev chev November 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... ; point to end of calc memory
    push bc ; stack counter
    memory
    push bc ; stack row number ...
    chev chev November 2013 Development
  • Timex 2068 hi-color / hi-res modes.Hello. I know this is not a Timex forum but since it is a very close relative of the Speccy I thought I'd ask my question here. Does anyone know …

    ... share while they tried to push out the 2068.

    memory expansion) among other things. You ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Sinclair Miscellaneous
  • FZX Driver for z88dkAn fzx library for z88dk can be downloaded [URL="https://drive.google.com/file/d/0B6XhJJ33xpOWM2hWNjAxMVkxaEk/edit?usp=sharing"]here[/URL]. The libr…

    ... a version), anything trying to push the spectrum in a modern ... nice things come up but memory always seems to get in ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Announcements
  • Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…

    ... You can see the default memory map [URL="http://z88dk.cvs ... be customized to change the memory map.

    [code ... where the heap for dynamic memory is located.

    ... #asm
    push af
    push bc
    push de
    push hl
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Development
  • Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…

    ... pointer


    // Memory Allocation Policy // the sp1 library ... // to allocate and deallocate dynamic memory
    void *u_malloc(uint size ... push af
    push bc
    push de
    push hl
    push ix
    push ...
    slenkar slenkar November 2013 Development
  • Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …

    ... m looking for a simple memory transfer routine that shifts ... /> ld hl, sp
    push hl
    ld hl, source ... push af
    push bc
    push de
    push hl
    push ix
    push ... push af
    push bc
    push de
    push hl
    push ix
    push ...
    chev chev November 2013 Development
  • Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…

    ... pointer


    // Memory Allocation Policy // the sp1 library ... // to allocate and deallocate dynamic memory
    void *u_malloc(uint size ... push af
    push bc
    push de
    push hl
    push ix
    push ...
    slenkar slenkar November 2013 Development
  • Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…

    ... />
    #endasm
    }
    // Memory Allocation Policy // the sp1 library ... // to allocate and deallocate dynamic memory
    void *u_malloc(uint size ... push af
    push bc
    push de
    push hl
    push ix
    push ...
    slenkar slenkar November 2013 Development
  • Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…

    ... heap pointer

    // Memory Allocation Policy // the sp1 library ... // to allocate and deallocate dynamic memory
    void *u_malloc(uint size ... ix
    pop iy
    push af

    ; ix ...
    slenkar slenkar November 2013 Development
  • Cross platform developmentI'm just vaguely considering supporting a few more retro 8 bit platforms for something I have in mind to do. Just Z80 and 6502 really, but that cove…

    ... />
    ld hl,1234
    push hl
    ld hl,buf ...
    push hl
    ld hl,16 ...
    push h;
    call itoa_callee
    memory right now. For C toolchains ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Development
  • bit manipulation conundrumWhat's a neat way to change this bit pattern in registers BCDE: [code]Loop0: ;change B:00000000 C:abcdefgh D:ijklmnop E:qrstuvwx[/code] to this bit …

    ... the source data is in memory. It's quite possible it ... access across the bytes
    push ix
    pop hl

    Get3to4:
    push bc ; store the loop counter ...
    David Jones David Jones November 2013 Development
  • Idiots Guide......To machine code, or assembler language...whatever the appropriate term is Basically at this stage I want to fiddle about and try and get used to…

    ... writing to a block of memory); modern compilers expend effort ... _result ; string destination
    push hl
    ld hl,33 ... br /> ld hl,_b
    push hl ; second parameter
    ... registers changed

    push hl
    rst $10 ; ...
    Alcoholics Anonymous Alcoholics Anonymous January 2014 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... file (disk, network, memory stream, etc) and then push a decompress filter ... 'd like to push it in front a memory stream (a stream ... that treats all memory as flat so you can ...
    Alcoholics Anonymous Alcoholics Anonymous January 2014 Brand new software
  • Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…

    ... that command itself uses some memory, so by looking at the ... prompt with no BASIC in memory, SP is down in TSTACK ... will give an "Out of memory" error, that just leaves 204 ...
    ld (23730),de
    push hl
    sbc hl,de ...
    Speccy_James Speccy_James January 2014 Development
  • Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…

    ...
    m3 dec b
    push hl
    ld l,c ... code to disk from emulated memory after assembling in zxSpin).
    Speccy_James Speccy_James January 2014 Development
  • PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…

    ... reset you can disable +D memory. In next versions of +D ... CALBAS.

    0066 NMI PUSH AF Save A register.

    004F UNPAGE_HL PUSH HL Stack return address.
    bverstee bverstee February 2014 Hardware
  • Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…

    ... print at

    ; ****************
    push hl ; save the screen address ... *256 = 16384, Spectrum's screen memory.
    ld h,a ; this ... .

    Also, notice the PUSH HL and POP HL. This ...
    polomint polomint March 2014 Development
  • Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …

    ... arcade game. There was enough memory allocated to him. It just ... tried to optimise everything and push the hardware.
    Lee Bee Lee Bee March 2014 Games
  • Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …

    ... tried to optimise everything and push the hardware.[/QUOTE]

    memory if you programmatically flip sprites ...
    AndyC AndyC March 2014 Games
  • Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…

    ... ). Hopefully I can find some memory mapped I/O addresses or ... displacement -- you need more to push it toward the ends, so ...
    Alcoholics Anonymous Alcoholics Anonymous March 2014 Development
  • Metal Man walkthroughIf you were watching the recent Russian game compo a little bit you probably turned your attention to Metal Man Reloaded, a very colourful and impres…

    ... all didn't use memory copying via PUSH/POP, using LDI sequences ...
    Oleg Origin Oleg Origin March 2014 Games
  • Interface 1bis updateSupport for connecting a standard PC keyboard to the interface?s PS/2 socket, in place of a mouse, has been added. The external keyboard?s output is …

    ... OUT (SHD),A; Switch memory.
    ;000A LD ( ... br /> 3874 : f5 PR_CMD PUSH AF; Save character.
    ... !
    38b3 : f5 PUSH AF
    38b4 : ...
    Dan Antohi Dan Antohi April 2014 Hardware
  • Interface 1bis updateSupport for connecting a standard PC keyboard to the interface?s PS/2 socket, in place of a mouse, has been added. The external keyboard?s output is …

    ... OUT (SHD),A; Switch memory.
    ;000A LD ( ... /> 386e : f5 LPR_CH PUSH AF; Save character.
    ... !
    38ad : f5 PUSH AF
    38ae : cd7438 ...
    Dan Antohi Dan Antohi April 2014 Hardware
<1…18192021222324…34>

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