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<1…14151617181920…34>
  • Challenge: Make a Speccy version of "Leisure Suit Larry 1"and put it on this site as a rom c'mon be nice!

    ... did. :)

    [CODE]LD SP,23999
    LD DL,23783 ... /> PUSH HL
    LD (23613),SP
    LD HL,34104
    LD DE,41536
    LD IX,24000
    LD A,255 ...
    Fikee Fikee August 2010 Development
  • Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …

    ... hl ;11
    push ix ;15
    exx ;4 ... /> push hl
    push ix
    exx
    push ... /> push hl
    push ix
    exx
    push ... push hl
    push ix
    exx
    push ... /> ....
    sp1
    ld sp, 000
    pop
    ...
    Fikee Fikee August 2010 Development
  • updated Fatware - keyboard patchHi! I work with Fatware code and already prepare keyboard patch for original version 0.12. Now it's possible to operate disk browser with keys: 1) c…

    ... />
    Notations:
    ---------------------------------------------------
    SP-Space PGUP-True Video
    EX-Extend Mode(SS+CS) ... /> playing.

    SP - mark files (uses only for ...
    velesoft velesoft September 2010 Development
  • Official CSSCGC 2010 Competition ThreadDear Wossers, As 'loser' of the 2009 competition, I am now obliged to host the 2010 competition. I have created a site which will provide a hub for …

    ... the sound and place the SP (which would be on the ... registers and had to use IX and IY, meaning that returning ... think only IY and not IX needs protecting and that is ...
    BloodBaz BloodBaz October 2010 Games
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ...

    draw_sprites ld ix,player ; IX points to player sprite array ... for SP change
    ld (stack+1),sp ; Store SP using ... ,bc
    ld sp,hl ; SP now points correctly into ... />
    stack ld sp,0 ; Reset SP
    ei ; Must enable ...
    ASM ASM October 2010 Development
  • Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …

    ... here (bank select)
    ld ix,tu01
    exx
    ld ... /> ld l,a
    ld sp,hl
    ld a,(de ...
    pop hl
    ld sp,hl

    ld h ... colour
    exx
    jp (ix) ; Draw next 8 x 16 ...
    ASM ASM November 2010 Development
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... />
    start: di
    ld sp,copy_tab ; **MUST RELOCATE**

    pop hl
    dec sp
    pop de
    out ... ; Patch to 48K ROM
    ex de,hl ; HL = 0
    add hl,sp ; Point HL to change_tab
    ASM ASM November 2010 Announcements
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ...

    draw_sprites ld ix,player ; IX points to player sprite array ... for SP change
    ld (stack+1),sp ; Store SP using ... ,bc
    ld sp,hl ; SP now points correctly into ... />
    stack ld sp,0 ; Reset SP
    ei ; Must enable ...
    sekrets sekrets November 2010 Development
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ...

    draw_sprites ld ix,player ; IX points to player sprite array ... for SP change
    ld (stack+1),sp ; Store SP using ... ,bc
    ld sp,hl ; SP now points correctly into ... />
    stack ld sp,0 ; Reset SP
    ei ; Must enable ...
    ASM ASM November 2010 Development
  • New TR-DOS utilities (2010)[url]http://velesoft.speccy.cz/other/trdos-utils-2010.zip[/url] This archive contain new convertors for PC: [B]SNA2SCL[/B] - convert SNA snapshot t…

    ... = 174B HL' = 4B0F
    IX = 1E5B SP = F1A2
    IY = 0181 PC ...
    -Micky -Micky December 2010 Sinclair Miscellaneous
  • Fuse: what do you want to see?An open brainstorm. If you had a team of programmers working on [url=http://fuse-emulator.sf.net/]Fuse[/url], what would you tell them to work on? …

    ... DE HL IX IY IR AF' BC' DE' HL' SP T-state ...
    Jimmy Jimmy January 2011 Emulators
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... br /> ;; ix
    ;; ------------------------------------------------------------
    _kbd_init: ld ix,_kbd_prev
    ld (ix),0 ; ... d and e
    keydown: ex af,af' ; alternate accu.< ... ; reset de
    endofscan: ex af,af'
    ret
    tstih tstih March 2011 Development
  • Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …

    ... no use of EXX or EX AF,AF' to get at ... is not having to reshuffle SP between the source and destination ... /> ld hl,0x1011
    ld sp,screen+0x0020
    push hl ...
    gasman gasman March 2011 Development
  • Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …

    ... this.

    Updating the SP for POP/PUSH can be ... , 49152 ; 10ts

    ld sp, hl ; 6ts
    pop bc ... ; 10ts
    ex de, hl ; 4ts
    ld sp, hl ; 6ts
    FrankT FrankT March 2011 Development
  • 50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…

    ... ;523068]Are you sure that IX/IY would slow everything down ... /> PUSH dd pc:5,sp-1:3,sp-2:3

    IX and IY registers, then that ... not be many uses of IX or IY on a line ...
    joefish joefish April 2011 Development
  • 50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…

    ... 've toyed with EXX / EX AF,AF' / IX & IY to get ...
    joefish joefish April 2011 Development
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    Here's another mod for na_th_an's program which uses a bit of machine code to do the line wrapping calculations. Just a first draft; it could probably be tightened up a bit.

    [code]

    10 CLEAR 62999: GO TO 1000
    ...
    ...
    Battle Bunny Battle Bunny May 2011 Sinclair Basic
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ... = 8888
    IX = 9999
    IY = AAAA
    SP = BBBB
    ... all registers set to $FFFF. SP set to $6003, sometimes $ ... sometimes FFFF)
    IX = FFFF
    IY = FFBF
    SP = sometimes 6003 ... .jpg[/img]
    - Registers IX and IY commonly hold their ...
    mcleod_ideafix mcleod_ideafix May 2011 Emulators
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... /> [CODE] org $ab06
    push ix ; ab06 dd e5 $0fts
    ld ($bc94), sp ; ab08 ed 73 94 bc ... $14ts
    ld sp, $580c ; ab0c 31 0c 58 ...
    jp jp July 2011 Games
  • An easy way to run Deus Ex, Unreal Tournament, etc, on modern systems[B]Deus Ex[/B] and [B]Unreal Tournament[/B], and other PC games built upon the first Unreal Engine, are fairly troublesome to get working with modern…

    ... compaibility of UT to XP SP 3, what audio software have ... such a fix for Deus Ex 2. I got that on ... work at all for Deus Ex 2 :oops:[/QUOTE]

    [B]Deus Ex 2[/B] gave me a ...
    ewgf ewgf July 2011 Chit chat
  • New game: WUNDERCHAR$Hi All, Finally finished my latest game: Wunderchar$. [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/loadingscr.gif[/IMG][IMG]http://…

    ... )
    ld hl, current_level_data
    ex de, hl
    ld bc ... there!

    RE: the sp routine to draw sprites, I ... too slow so went with sp, though did feel I was ...
    R-Tape R-Tape August 2011 Brand new software
  • automatic relocating of non-relocatable codeI was pondering upon the problem of changing absolute addresses used by CALL, JP, etc. when code is moved, without reassembling at the new location; …

    ... hl,0
    add hl,sp
    [/code][/QUOTE]

    sp" ideas - very neat.

    Although I think that using SP to step through the changes ... to be; I might use IX instead. :)
    Battle Bunny Battle Bunny August 2011 Development
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... /> [code]
    pc=read_word(sp);
    sp+=2;
    [/code]

    IX and IY are both Low ...
    rich_chandler rich_chandler August 2011 Emulators
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... ];
    A=buffer[22];
    SP=(buffer[24]
    PeterP PeterP August 2011 Emulators
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... ];
    A=buffer[22];
    SP=(buffer[24]
    rich_chandler rich_chandler August 2011 Emulators
  • machine code loadercan someone have a look at this loader and break down what its actually doing and also how i can stop it from executing the 2 loads of headerless blo…

    ... />
    [code]
    5B00 LD SP,5BFF
    5B03 LD A ... NZ,5B11
    5B1A LD IX,4000
    5B1E LD DE ... NC,5B1A
    5B29 LD IX,5CB6
    5B2D LD DE ...
    Geoff Geoff August 2011 Sinclair Miscellaneous
  • machine code loadercan someone have a look at this loader and break down what its actually doing and also how i can stop it from executing the 2 loads of headerless blo…

    ... 5b00:

    5B00 LD SP,5BFF

    ; following calls ... disk

    5B29 LD IX,5CB6
    5B2D LD DE ...
    Alcoholics Anonymous Alcoholics Anonymous August 2011 Sinclair Miscellaneous
<1…14151617181920…34>

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