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  • [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…

    ... byte on to the attributes address.
    dec de ; Move back ... taken, but uses 1 more byte.

    ; ... byte on to the screen address.
    dec de ; Move back ... byte.

    ;ret
    infinity:
    jp infinity ; Avoid going back ...
    ST1 ST1 November 2018 Development
  • Joffa Smith - Kim Justice DocumentaryTHE LIFE AND GAMES OF JOFFA SMITH, ZX SPECTRUM GENIUS | Kim Justice: [url="https://www.youtube.com/watch?v=beC0Ze1wFXw"]Youtube Link[/url] RIP Fr…

    THE LIFE AND GAMES OF JOFFA SMITH, ZX SPECTRUM GENIUS | Kim Justice:
    [url="https://www.youtube.com/watch?v=beC0Ze1wFXw"]Youtube Link[/url]

    RIP Frobrush...
    Van_Dammesque Van_Dammesque November 2018 Sinclair Miscellaneous
  • Moritz Strikes BackHi there, it is Moritz' birthday!!!!That's why i have to post the little SEUD shooter: "Moritz Strikes Back". Story: After a session with the famou…

    ... little SEUD shooter: "Moritz Strikes Back".
    Story:
    After a ...
    chico_71 chico_71 February 2019 Brand new software
  • Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…

    ... 's with cacheing the screen byte in a register and adding ... to that, before writing it back to the screen.

    joefish joefish March 2019 Development
  • Another Spectrum is brought back to life.Hi Spec-chums. I have been having bit of busy afternoon with repairs today. I've brought back to life a Panasonic Super-VHS recorder, and more intere…

    ... repairs today. I've brought back to life a Panasonic Super ... how I got this Speccy back to life.

    So ... was about bringing this Speccy back to life. Hope you've ...
    Your Spec-chum Your Spec-chum August 2019 Hardware
  • Getting stuff "out of the back end"Does anyone know how to do this ? What I mean is :There are lots of WOS library files with say two learning modules on one Tape side : lets ca…

    ... out how to save "this back end Lesson 2 bit" separately ...
    harriusherbartio harriusherbartio August 2019 Emulators
  • Bringing back spectrum games on Steam, as well as micro computer games in generalHello, Clive Townsend recently re-released Saboteur 1 and 2 on Steam and Switch ? I think it would be great if more old games were briught back. M…

    ... more old games were briught back.

    Many people nowdays ...
    holycross holycross August 2019 Games
  • Mostly Harmless - an Elite save game editor[img]https://i.imgur.com/MoNgWCe.png[/img] [b]Mostly Harmless - an Elite save game editor The most complete save game editor available for the…

    ... ZX Elite a few years back and also figured out the ... .

    Pretty much every byte of the save file is ...
    Ersh Ersh March 2020 Brand new software
  • So, are we remembering Joffa or what?Well, it's nearly 5 PM where I live and I was kinda expecting someone from his "homeland" to have posted something ... it's been exactly 10 years ago…

    ... glass/drink/saucer to ol' Joffa. I've got something special ...
    XTM of TMG XTM of TMG June 2020 Sinclair Miscellaneous
  • New "special" issue of CRASH (with tribute to Jonathan Smith)Hi everyone, so it's [i]not really[/i] an issue of CRASH and also lacking a bit as far as page numbers are concerned. This is just me having a bit…

    ... 40th birthday a few years back. His first name happens to ... weeks ago and what with Joffa's ten year commemoration date ...
    XTM of TMG XTM of TMG June 2020 Sinclair Miscellaneous
  • 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…

    ... screen.
    djnz mushlp ; loop back until all mushrooms displayed.
    halt ; delay.
    ; Jump back to beginning of main loop ...
    ; the contents of the byte at that location.
    random ...
    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 …

    ... 8933
    jr mushlp ; loop back until all mushrooms displayed. ;------------------to ... .
    halt ; delay.
    ; Jump back to beginning of main loop ...
    ; the contents of the byte at that location.
    random ...
    digital digital July 2020 Assembler
  • Jet Set Willy & Manic Miner Community is back!This is just a quick note to let everyone know that [url="https://jswmm.co.uk"]Jet Set Willy & Manic Miner Community[/url], a forum dedicated to thes…

    ... (original or modified/extended) is back online after a four months ...
    jetsetdanny jetsetdanny December 2020 Announcements
  • Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…

    ... *INT(o/256): REM lower byte
    350 POKE 63693,o ... /256: REM higher byte
    360 GO TO 400 ... POKE 63692,196: REM lower byte
    390 POKE 63693,248 ... : REM higher byte

    400 REM color ...
    Volker Volker February 2021 Software
  • Back Track (Dragon32) conversion?Has anyone thought to convert Back Track? It’s a simple maze game for the Dragon32 with ingenius graphics (for the time). Published by Incentive, it …

    Has anyone thought to convert Back Track? It’s a simple ... . As far as I know, Back Track was never converted to ...
    Bangstick Bangstick March 2021 New game ideas
  • The ZX Dev is back - ZX Dev Media - Demakes!After more than 1 and a half years, the ZX Dev compo is back! This edition the topics are Media (TV, Movies, cartoons, radio, books, comics, etc) and…

    ... , the ZX Dev compo is back! This edition the topics are ...
    Ivanzx Ivanzx April 2021 Announcements
  • The ZX Dev is back! ZX Dev Media & DemakesAfter more than 1 and a half years, the ZX Dev compo is back! This edition the topics are Media (TV, Movies, cartoons, radio, books, comics, etc) and…

    ... , the ZX Dev compo is back! This edition the topics are ...
    Ivanzx Ivanzx August 2021 Announcements
  • Fighting Warrior's protection systemThis is one of those bizarre cases where cracking the loading system is orders of magnitude more fun than playing the game. (Indeed, discovering I wa…

    ... that cell followed by 1 byte for the attribute. This allows ... easy to work out, but back in the day, armed with ...
    Ritchie333 Ritchie333 October 2021 Games
  • Remainder (Mod) calculationsI've been figuring out how to calculate remainders after integer division by a constant divisor k (A mod k = A % k). I found that for most small di…

    ... and fast, down to a byte sized number A with the ... be faster: E.g. multiply back k and subtract this from ... the shifts to save one byte if A$FF.
    A ... saves one shift and one byte for a 19 bytes (74cc ...
    Magne Magne October 2021 Assembler
  • Hunchback is back!Hi, I would like to publish again an old-fashion style writing what perhaps should be valueable if we wrote 1985. Maybe somebody will try it ... …

    ...

    [b]HUNCHBACK is back![/b]

    DO YOU ...
    Pgyuri Pgyuri April 2022 Games
  • is a arduino uno / nano fast enough to talk to a specie ?my current project is to load games onto the specie via SD card / Arduino uno / nano although i suspect that the micro controller will not be able to…

    ... and receive the correct first byte and then 20 or so ... it only receives one random byte. so back to the drawing board ...
    mark8bit mark8bit April 2022 Hardware
  • Sort 2 byte words (x, y) on ypos, also question about swap (DE), (HL)Well that was a lot of debugging ;) But if you want a routine which takes an array of 16 byte words x, y and then sort them on y (ignoring x), I'm…

    ... takes an array of 16 byte words x, y and then ... to an array of 16 byte values and those are x ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • UDG creation? Back to the basics.I just discovered that I have a program called TILED in my download folder and it might be the very tool I need except that I dont think it can expor…

    ... beaten and will get myself back into the swing of UDG ...
    mik3d3nch mik3d3nch October 2022 Sinclair Basic
  • Poke helpHi can any offer me some help please! I am using the WinZ80 emulator and playing footballer of the year. The Zip file contained POKEs but when i use …

    ... without reset

    When back in emulator press F5 and ... B
    for only one byte.

    Esc + N to ...
    Dr BEEP Dr BEEP May 2001 Emulators
  • How did people program GamesI have been wondering how people wrote games. Did they use basic and just type in to the spectrum interface and save it. Or did they use assembler, a…

    Thinking back to the time that I ... did actually hand code each byte and didn't use an ... I had miscalculated an incorrect byte.

    When I first ...
    Clive Brooker Clive Brooker August 2001 Games
  • Anyone Recognizes This Loader?Hi there! I live in Argentina. I have a -dead by now- CZ Spectrum (a ZX clone made by an argentinian company, Czerweny, which used to make... Excell…

    ... occupied from 18432 for 2048 byte (or less) would expand the ... of the 128k then poke back to main spectrum memory and ...
    MatGubbins MatGubbins March 2002 Sinclair Miscellaneous
  • Chuckie Egg and joypads on the SpectrumAn old favourite of mine is "Chuckie Egg", but it has no joystick option. I've got a dual port DK Troniks interface, the first port takes IN 31(Kemps…

    ... . All the bits of this byte corresponded to whether a direction ... the code won't 'fit' back into the original space. So ...
    Ed Ed March 2002 Games
  • Gaming MythsLike mentioned in earlier threads - we have games like Mire Mare, Lunar Jetman and Scooby Doo. Does any other ones spring to mind. They need not be…

    I remember way back when I got Street Fighter ... used to work in Micro Byte of Hull, rang Julian Rignal ...
    NAH NAH April 2002 Games
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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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