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<1…17181920212223…34>
  • New Windows Spectrum Emulator: CSpect V0.2 ZXSpectrum emulator by Mike DaillyNew Windows Spectrum Emulator: CSpect V0.2 ZXSpectrum emulator by Mike Dailly (Found on SpecNext Facebook-Page) Info and Download (=klick "CSpe…

    ... xscroll
    ===================
    ld bc, $243B ; select the X ... 0 to 255
    ld bc, $253B
    out (c ... yscroll
    ===================
    ld bc, $243B ; select the Y ... 0 to 191
    ld bc, $253B
    out (c ...
    Luzie Luzie July 2017 Emulators
  • 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. …

    ... /> LD DE,FIFTH
    LD BC,2
    LDIR ; ...and becomes ... LD DE,FOURTH
    LD BC,2
    LDIR
    LD ... LD DE,THIRD
    LD BC,2
    LDIR
    LD ... LD DE,SECOND
    LD BC,2
    LDIR
    LD ...
    Alessandro Grussu Alessandro Grussu July 2017 Assembler
  • Spectrum games collection for saleHi all I'm having a clear out and all my old ZX Spectrum games must go. The reason being is I'm now marrried and I need to give the other half so…

    ... the movie Ocean
    Bazooka Bill Fitroy House Cassette only
    schneil schneil July 2017 Sales
  • shadow regs musingIn the process of optimising some assembler, it occurred to me how great it would have been if the Z80's shadow reg opcodes had been a bit more fully…

    ... to exchange either AF or BC,DE,HL. Which makes them ... cumbersome to get shadow BC into regular BC without going via the ... up with:

    ex bc, bc'
    ex de, de'
    CatWeazle CatWeazle 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 …

    ... /> LD HL,(23641)
    LD BC,130
    CALL 5717
    POP HL
    LD BC,128
    LDIR
    SET ...
    Paddy Coleman Paddy Coleman August 2017 Development
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ... />
    PUSH AF
    PUSH BC
    PUSH DE
    PUSH ...
    POP DE
    POP BC
    POP AF

    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 …

    ... ; string to print
    ld bc, eostring-string ; length of string ...
    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…

    ... IX

    2$ push bc ;remember counter
    ld a ... ;table row

    pop bc ;restore counter
    djnz 2 ... br /> control_count ld bc,0 ;(SMC) count BC keys up (HL ... will be incremented BC times)
    cpir ;while ...
    Ast_A_Moore Ast_A_Moore October 2017 Development
  • Other than using attributes what other ways to detect collisions, when using char based movement?So I'm slowly working out the bits and pieces to write a game completely in assembly. I've been using attributes when writing in BASIC to detect whet…

    ... the row number
    ld bc,10; This is the collumn ... number
    push bc
    ld bc,32
    LOOP:
    add hl,bc
    dec a
    jr ... nz,LOOP
    pop bc
    add hl,bc
    ld a ...
    ivanb303 ivanb303 November 2017 Development
  • Detecting +3 / +2AWhat's a simple but reliable way to detect if code is running on a +2A/+3? My first though was to try switching to ROM2 and then checking for the …

    ... :

    [code]detect ld bc,$7ffd ; official paging port
    FishFinger FishFinger December 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–…

    ... ’re in BASIC)
    ld bc,$7ffd
    di
    ld ... /> ld de,$f701
    ld bc,256
    ld (hl),$fe ...
    Ast_A_Moore Ast_A_Moore February 2018 Development
  • New colour palette for Spectrum emulators, 16K/48K/+ machinesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA. This colour palette …

    ... D C6
    14 BC B9
    BC C2 C4
    0 ...
    rga24 rga24 February 2018 Updates
  • New colour palette for 16K/48K/+ machines, based on ULA YUV voltagesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA. This colour palette …

    ... D C6
    14 BC B9
    BC C2 C4
    0 ...
    rga24 rga24 February 2018 Emulators
  • Spectrum Gaming Livestream This Sunday 6pm (GMT).Hi all, just announcing a new livestream (EP.9) this sunday at 6pm (GMT) on my retro gaming channel: https://www.youtube.com/user/ZEUSDAZ This editi…

    ... will be Arkanoid, B.C. Bill, Pogo (Q*Bert), Dynamite Dan ...
    ZEUS ZEUS February 2018 Games
  • How to avoid flicking? IM2 help.Hi, I have started on a quest to make a demo for ZX Spectrum. However the display is flickering and I guess it is something about updating at…

    ... ld a,(pattern1)
    ld bc,five_lines
    ld (hl),a ... ld a,(pattern1)
    ld bc,four_lines
    ld (hl),a ... ld a,(pattern1)
    ld bc,three_lines
    ld (hl),a ... ld a,(pattern1)
    ld bc,three_lines
    ld (hl),a ...
    MartinMSPedersen MartinMSPedersen March 2018 Assembler
  • Keyboard reading questionOkay, here's a weird one. I have to elaborate a bit: In the 90s I coded quite a lot of stuff, but I haven't done so in 20 years. There was a hidde…

    ... reading the keyboard:
    LD BC,F7FE - port for keys 1 ...
    XTM of TMG XTM of TMG March 2018 Assembler
  • Water Rates, do they owe YOU money ?Right this is one to check, I would never have known this if I had not gotten annoyed by the patronising letter I had from the water board. I am on a…

    ... , they are reducing my monthly bill to 40.00 quid and ...
    grey key grey key May 2018 Chit chat
  • ANN: Tipshop updated Friday, 03 August 2018Friday 03 August 2018 Blimey - this March update took a while to come round, eh? Feels like about 6 months! (Ahem. Ed)... Suffice it to say that Rea…

    ... Barbarians, B-Squared,
    Buffalo Bill's Wild West Show, Carlos ...
    hackersanon hackersanon August 2018 Announcements
  • Prportional Ascii text scrollerA couple of years ago I wrote a little scroller that nestles at the top of RAM (FFCA - 65482) and scrolls standard Ascii encoded text from anywhere y…

    A couple of years ago I wrote a little scroller that nestles at the top of RAM (FFCA - 65482) and scrolls standard Ascii encoded text from anywhere you point it to in memory, with the possibility to auto repeat when it comes to the end of the message.
    Arkannoyed Arkannoyed August 2018 Development
  • [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…

    ... system variable 'ATTR_P'.
    ld bc,$2018 ; b = cell counter, 32 ... means blank it.
    ld bc,$0018 ; b = byte counter, 256 ...
    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…

    ... iy, #0x00
    add iy, bc

    ; destination byte can ...
    Sol_HSA Sol_HSA December 2018 Development
  • 1989-2019Ok Ok maybe this is going a bit far now, but here's another year to look back on the games from 30 years ago and tear into them, or give occasional p…

    ... Liu (Pai Mei from kill Bill) as San Te the Shoa ...
    dm_boozefreek dm_boozefreek January 2019 Games
  • Vote for your favourite Jet Set Willy mod!As part of the 35th anniversary of Jet Set Willy event at this year’s Play Expo in Manchester on Saturday May 4th, there will be an audience vote to …

    ... -qAUjc-93vfe5DCPFqcSa-bc-TFXQ3JPnUDxgQgAeLX7zJvKVGIFhP89o_w27gXv_nqURzx_rZK-zYj2eMvPQE4iuLtDdse0jQYB4vFE"] ... AT01FFVc2lMxnVtE9Ashlyzbfua-qAUjc-93vfe5DCPFqcSa-bc-TFXQ3JPnUDxgQgAeLX7zJvKVGIFhP89o_w27gXv_nqURzx_rZK-zYj2eMvPQE4iuLtDdse0jQYB4vFE[/url]< ...
    Lee Fogarty Lee Fogarty April 2019 Announcements
  • Bug in ZX SpinADD HL,BC sets Z-flag when adding #faff and #501. By design ADD HL,rr does not set zero flag.

    ADD HL,BC sets Z-flag when adding #faff and #501.

    By design ADD HL,rr does not set zero flag.
    Dr BEEP Dr BEEP April 2019 Emulators
  • converting sna to tapsince i'm struggling to find a simple sna to tap converter that works fine on gnu/linux, i'm about starting to code one on my own (using a scripting …

    ... /> out 254,bordervalue
    ld bc,1280
    ld de,16834 ... ld de,nn
    ld bc,nn
    ld af,nn ... ld de,nn
    ld bc,nn
    ld af,nn ... br /> $03 DE'
    $05 BC'
    $07 AF'
    $09 ... br /> $0B DE
    $0D BC
    $0F IY
    $ ...
    nitrofurano nitrofurano April 2019 Development
  • Help With infinite music on 128KHi :) I'm trying to play infinite simple music on 128K , but i don't know what is wrong with the loop I tried this routine but doesn't work I…

    ... /> jr z,jumpNotes
    ld bc,$FFFD
    out (c),a ...
    maeloterkim maeloterkim July 2019 Development
<1…17181920212223…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

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