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  • Some more games to sell from JapanHi again folks, I have a few more games to sell from here in Japan. I've tested them all and they all work ok. Some are weird, they'll only load o…

    ... here:
    https://pcbiroiro.blogspot.jp/

    Last time I ...
    MagicKnight MagicKnight January 2017 Sales
  • MEMPTR edge casesFor no particular reason, I've finally got round to emulating MEMPTR in Fuse. A few bits which aren't completely clear to be from the [url="http://zx…

    ... is very clear for conditional JP and CALL, but not so ...
    Philip Kendall Philip Kendall January 2017 Hardware
  • Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …

    ... (jumpadr+1), a ; 13ts
    jp ldnext ; 10ts ; load next byte ... ; patch jr to aa2sa
    jp ldnext ; 10ts ; load next byte ... /> ld a, $00 ; 07ts ;
    jp lddelay ; 10ts
    ; nextix + lddelay ...
    FrankT FrankT February 2017 Assembler
  • ANN: Tipshop updated Monday, 27 February 2017Monday 27 February 2017 Happy New Year. And Valentine's Day. And - oh - you get the idea.. Things have been a tad busy in Real Life * Andy Ford …

    ... POKEs for Steeplejack.

    * JP provided cheats for Impossible Mission ...
    hackersanon hackersanon February 2017 Announcements
  • Interupt service routinehas anyone set up a interupt service routing with pasmo? this one I tried resets the speccy EDIt- I placed the code after the END directive, I fi…

    ... ,#255
    cp 0
    JP NZ,Labelif2
    ld a ... /> Labelif2
    cp 0
    JP Z,Labelif3
    ld a ... (hl),a
    Labelif3
    jp INFINITELOOPLABEL1
    org 51400
    slenkar slenkar April 2017 Development
  • High score table routineI wrote this general purpose high score table routine. It stores 5 scores and displays them alongside the player names, which are 8 characters long. …

    ... TEMP

    JP INSER ; proceed to the insertion ... (TEMP),HL

    JP INSER

    NEW_4:

    JP INSER

    NEW_3:

    JP INSER

    NEW_2:
    Alessandro Grussu Alessandro Grussu July 2017 Assembler
  • Flood Fill IssueHi Folks, Came across the following Flood Fill routine by John Metcalf: [code]; scanline fill by John Metcalf ; call with d=x-coord, e=y-coo…

    ... /> push de 60101 D5
    jp (hl) 60102 E9[/code]
    Paddy Coleman Paddy Coleman August 2017 Development
  • Using BASIC from Machine CodeHi Folks, Came across a very interesting article by Toni Baker in Your Spectrum: http://www.users.globalnet.co.uk/~jg27paw4/yr11/yr11_66.htm …

    ... ,(23610)
    CP 255
    JP NZ,4867
    RET
    Paddy Coleman Paddy Coleman August 2017 Development
  • Can't Get My Simple Code To RunHello again, I'm trying to run the following simple code: [code] org 32768 main ld b, 21 ; x coordinate is …

    ... the text
    gameLoop
    jp gameLoop ; loop indefinitely

    Scorpion_Realities Scorpion_Realities October 2017 Development
  • A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…

    ...
    ld bc,5
    jp 8252 ;upon RETurn from the ...
    ld bc,5
    jp 8252

    ss_key cp ...
    ld bc,7
    jp 8252

    cs_key cp ...
    ld bc,7
    jp 8252

    as_is_key rst ...
    Ast_A_Moore Ast_A_Moore October 2017 Development
  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…

    ... ),a
    pop af
    jp $38
    [/code]
    Ast_A_Moore Ast_A_Moore February 2018 Development
  • "In nihilum reverteris": a new big text-adventure 128K in English languageHi guys. "In nihilum reverteris" - another text-game / interactive novel by Yerzmyey. Platform: ZX Spectrum 128K or higher. (C) 2018 by H-PRG.…

    ... help and English language help - Gasman/H-PRG.

    Scientific ...
    Yerzmyey Yerzmyey March 2018 Brand new software
  • A text-adventure for the RASPBERRY PIHi, we made a Rpi3 version of our ZX Spectrum 128uK game "In nihilum reverteris". Maybe somebody might be interested. DOWNLOAD: http://yer…

    ... -PRG.
    English language help - Gasman/H-PRG.


    Yerzmyey Yerzmyey April 2018 Chit chat
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

    ... to the previous row.
    jp nz,cls_attributes_loop ; Keep looping until ... to the previous row.
    jp nz,cls_screen_loop ; Keep looping until ... />
    ;ret
    infinity:
    jp infinity ; Avoid going back to ...
    ST1 ST1 November 2018 Development
  • Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…

    ...
    dec -7 (ix)
    jp NZ, rowloop
    ld sp ...
    Sol_HSA Sol_HSA December 2018 Development
  • predetermined number of loops in assemblerhi, i have this code that i have already written org 40000 ld c,33 ld (23612),a ld a,c rst 16 inc c jp 40001 but i only want to loop i…

    ... 16
    inc c
    jp 40001

    but i ...
    digital digital February 2019 Assembler
  • Setting breakpoints in source code to make debugging easierAfter two years I've resumed my Speccy coding project. I'm porting a yet "unported" game from C64/Atari to 48k Spectrum using Z80 assembler. At the m…

    ... called "debugger" which simply is "jp #0065". While this works exactly ...
    arttu arttu August 2019 Development
  • Is it possible to run a single BASIC line via a ROM CALL of the Standard ZX 48k ROM?On: https://cygnus.speccy.cz/popis_trdos-assembler.php I found the following code: [code] CHADD equ 23645 ; Location of SOS variable CHADD ld…

    ... TRDOS SAVE via chadd
    jp BACK ; Jump to program point ...
    Luzie Luzie October 2019 Development
  • Currah uSpeech ROM Paging and BootyHi, When I emulated the Currah uSpeech for [url="http://www.inkland.org.uk/inkspector"]InkSpector2[/url], I made it page in its own ROM on memory …

    ... looks like this:

    jp p,$ff15

    A ...
    inky inky October 2019 Hardware
  • Has anyone ever heard Spectrum MIDI?Simple question: has anyone ever heard MIDI controlled by a Spectrum? This seemed to be one of the major features added by the Speccy 128, which eve…

    ... SID sound chip), and Matt "Gasman" Westcott linking up a bunch ...
    equinox equinox March 2020 Sinclair Miscellaneous
  • papAYa - an AY-3-8912 sound chip expansion board for the Raspberry Pihttps://github.com/gasman/papaya papAYa - an AY-3-8912 sound chip expansion board for the Raspberry Pi Why? I do ZX Spectrum chiptune perfor…

    https://github.com/gasman/papaya

    papAYa - an ... /> [img]https://raw.githubusercontent.com/gasman/papaya/master/images/papaya2-on ...
    Luzie Luzie May 2020 Chit chat
  • why am i getting b integer out of range in this code?ive tried running this in spin but thats what i get [code]main org 40000; ; We want a black screen. ld a,71 ; white ink (7) on black paper (0…

    ... beginning of main loop.
    jp mloop
    ; Move player left ...
    digital digital June 2020 Assembler
  • this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …

    ... beginning of main loop.
    jp mloop
    ; Move player left ...
    digital digital July 2020 Assembler
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