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<1…12131415161718…34>
  • My kit-form ZX81Advice required, please. I was one of those who picked up an immaculate kit-form ZX81 from eBay about six or seven years ago, since when I've been …

    ... up an immaculate kit-form ZX81 from eBay about six or ...
    4am 4am April 2012 Sinclair Miscellaneous
  • Inefficient code in ROM, from ram-check to RAM-DONEHere is the inefficient code: [CODE] ;; ram-check L11DA: LD H,D ; Transfer the top value to the HL register LD L,E …

    Here is the inefficient code:

    [CODE]
    ;; ram-check
    [/CODE]

    And ... faster routine:

    [CODE]
    ;; ram-check
    ... to last valid location.
    [/CODE]

    Another ...
    antoniovillena antoniovillena April 2012 Development
  • Sinclair ZX81 PSION SPACE RAIDERS 1982 30th anniversaryFor more than 20 years my ZX81 stuff was stored at different places in my parents attic. Back in 2009 I?ve collected all what I could find. What I wa…

    ... more than 20 years my ZX81 stuff was stored at different ... chance and was rebuilding my ZX81 system including my (newly found ... , as out of my four ZX81?s and five 16K RAM ... and was fascinated of the ZX81 again. What followed was a ...
    QLvsJAGUAR QLvsJAGUAR April 2012 Sinclair Miscellaneous
  • Zx Spectrum Vs Commodore C64 Digital Spy Article[url]http://www.digitalspy.co.uk/gaming/news/a377768/zx-spectrum-vs-commodore-64-gamings-greatest-rivalry.html[/url] Please leave your comments for …

    [url]http://www.digitalspy.co.uk/gaming/news/a377768/zx-spectrum-vs-commodore-64-gamings-greatest-rivalry.html[/url]

    Please leave your comments for it on Digital Spy
    retrogod retrogod April 2012 Announcements
  • 30 years article - Speccy Vs C64 Digital Spy magazine[url]http://www.digitalspy.co.uk/gaming/news/a377768/zx-spectrum-vs-commodore-64-gamings-greatest-rivalry.html[/url] Please leave your comments for …

    [url]http://www.digitalspy.co.uk/gaming/news/a377768/zx-spectrum-vs-commodore-64-gamings-greatest-rivalry.html[/url]

    Please leave your comments for it on Digital Spy
    retrogod retrogod April 2012 Sinclair Miscellaneous
  • simplest method to pass a string to m/code?The statement "RANDOMIZE numvar+USR mc" is a simple way of passing a single numeric parameter to a m/c routine, as mc can retrieve numvar from the to…

    ... $;: but that needs some prefatory code to adjust the machine stack ... needs two statements.
    * RANDOMIZE CODE "s"+USR mc: but that ... needs some prefatory code to set up a location ...
    Battle Bunny Battle Bunny April 2012 Sinclair Basic
  • Help Launch a ZX81 RocketSomeone on the ZX81 forums suggested that it would be possible to build a model rocket which would launch with a ZX81 as a payload. The aim is to ra…

    Someone on the ZX81 forums suggested that it would ... which would launch with a ZX81 as a payload.

    ZX81 meeting in Germany in March ... .

    See [url]http://zx81.swtrocketry.com/[/url]
    rwap rwap April 2012 Sinclair Miscellaneous
  • Face-Off: ZX Spectrum vs. Commodore 64 articleA very nice write up.... [URL="http://www.eurogamer.net/articles/digitalfoundry-face-off-zx-spectrum-vs-commodore-64"]Face-Off: ZX Spectrum vs. Comm…

    A very nice write up....

    [URL="http://www.eurogamer.net/articles/digitalfoundry-face-off-zx-spectrum-vs-commodore-64"]Face-Off: ZX Spectrum vs. Commodore 64 [/URL]
    Korinel Korinel April 2012 Sinclair Miscellaneous
  • FS: ZX81 booksMicrosprout game crazed is flogging a few books ive accumulated in his shop for me, they can be found [URL="http://stores.ebay.co.uk/Microsprouts-Gam…

    ... .uk/Microsprouts-Game-Crazed/ZX80-ZX81-/_i.html?_fsub=2228970012& ...
    Macc Macc May 2012 Sales
  • What's wrong with this code ?OK, working my way through Jonathan Cauldwells 'How To' tome and I can't get the following to run in either spin or basin. ( iused the assembler in b…

    ...
    Anybody help ?

    [CODE] org 30000
    ; We want ... basexy ld a,22 ; AT code.
    rst 16
    ... /> ld a,144 ; ASCII code for User Defined Graphic 'A ... />
    ; UDG graphics.
    [/CODE]
    Saboteur Saboteur May 2012 Development
  • z88dk vs. sdccI've just read this article (in Spanish) [url]http://www.cpcmania.com/index2.asp?urldest=Docs/Programming/SDCC_vs_z88dk_Comparando_tama%F1o_y_velocid…

    ... quite interesting. Actually you can code great games with z88dk with ...
    na_th_an na_th_an May 2012 Development
  • OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…

    ... BASIC is based on the ZX81 ROM (thanks to John Grant ... quite a large chunk of code that needed reimplementing, and the ... in different, but functionally equivalent code for the missing routines, as ... LDIR block data copy machine code command), ON ERROR (error ...
    chev chev May 2012 Sinclair Basic
  • "MONOCHROME": Magazine about ZX81 (issue 2 - 2012)[b]OK, seems like every subscriber got his paper copy. So, hereby I publish an electronic - PDF - version of "MONOCHROME" ZX81 magazine (issue 2 - …

    ... electronic - PDF - version of "MONOCHROME" ZX81 magazine (issue 2 - 2012).
    [url]http://zx81.republika.pl/monochrome_issue_2_magazine_zx81.pdf[/url ...
    Yerzmyey Yerzmyey June 2012 Sinclair Miscellaneous
  • Minigamecompo 2012[URL]http://minigamecompo.weebly.com/[/URL] As last year, 1K, 2K and 4K compo. Now I can use all announcements on all forums you participate. So f…

    ... I will have time to code a game myself so it ... 6 games for the 1K ZX81 in hires, but they will ...
    Dr BEEP Dr BEEP June 2012 Games
  • The music-album made entirely on ZX81+ZXpandAY+MrX! :)Hi guyz. [b]DOWNLOAD:[/b] [url]http://yerzmyey.i-demo.pl/[/url] This is a collection of songs made on ZX81 with TurboSound for ZX81 (two ZonX inte…

    ... titles are somehow related with ZX81 machine. ;)

    The ... : [/b]
    01. Yerzmyey - ZX81
    02. Yerzmyey - New Line ... http://yerzmyey.i-demo.pl/zx81/yerz-zx81-cover.zip[/url]

    Software files for ZX81 with ZXpand + ZXpand_AY + Mr X ...
    Yerzmyey Yerzmyey June 2012 Sinclair Miscellaneous
  • ZX80, ZX81, boxed and unboxed 48K'sI have a lot for sale again. [B]ZX80[/B] To start with a ZX80: in good shape, no missing parts, yellowed though. This one includes a ZX81 rom. Also …

    ... .
    This one includes a ZX81 rom.
    Also it has ... the original ZX81 keyboard overlay, [URL="http://www ... / 55 GBP

    [B]ZX81, Interface 1[/B]
    Some ... working ZX81's are on my shelves ...
    bverstee bverstee June 2012 Sales
  • Help needed... RND in machine codeI have been battling away trying to convert a simple BASIC routine (below) to machine code, but to no avail. The routine is used to fire 2 bullets a…

    ... BASIC routine (below) to machine code, but to no avail.
    daveysludge daveysludge July 2012 Development
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    ... the back porch fix for ZX81 using LM1881?
    I did ... /> [IMG]http://www.artem.ru/zx81/1.gif[/IMG]

    ArtemKuchin ArtemKuchin July 2012 Hardware
  • ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…

    ... composite video mod on my ZX81, and today was going to ... it. Unfortunate when started my ZX81 seems faulty. I get a ...
    pmsr pmsr July 2012 Hardware
  • Skool Daze source code (and others)I suggest adding the source code for [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0004549"]Skool Daze[/URL] (available [URL="http://pyskool…

    I suggest adding the source code for [URL="http://www.worldofspectrum ... br />
    [QUOTE]The source code file contains a detailed list ... to Skool[/URL] (source code with list of bugs available ... Contact Sam Cruise[/URL] (source code with list of bugs available ...
    Einar Saukas Einar Saukas July 2012 Infoseek database
  • Custom PC magazine - ZX81 articleThis months Custom PC mag - Issue 109, Oct 2012 - has got quite a good 5 page article on building a ZX81 from scratch using one of the original kits.…

    ... page article on building a ZX81 from scratch using one of ...
    ADJB ADJB August 2012 Chit chat
  • Hep needed with a bit of code...I've written a bit of code to make a character move across the screen, but the counter stops at 29 when the 3 lines to delete the characters trail ar…

    ... 've written a bit of code to make a character move ...
    daveysludge daveysludge August 2012 Development
  • z80 Code Profiling (RESOLVED)Hi All, Just a quick question to ask if there is any way of profiling z80 Code for the Speccy??? I'm trying to write a piece of software and I curr…

    ... any way of profiling z80 Code for the Speccy???

    code, which is a pain in ... to auto-profile the running code, I would be extremely grateful ...
    Shando Shando August 2012 Development
  • Machine code loopsThis might sound a bit daft, but I,ve forgotten how to do loops using th 'b' register... I want to loop this x mount of times: [CODE]ld a,r and 6 i…

    ... mount of times:

    [CODE]ld a,r
    and ... /> call 43100
    call 45000[/CODE]

    There is any ...
    daveysludge daveysludge August 2012 Development
  • New ZX81 Game ReleasesIt is nice to see another two titles recently released for the ZX81 by Revival Studios - [url]http://www.revival-studios.com[/url] Both games also …

    ... titles recently released for the ZX81 by Revival Studios -
    [url ...
    rwap rwap August 2012 Games
  • Scan/picture help: Night Gunner ZX81Hi guys, After some assist, don't know if anyone has a copy of Digital Integration's Night Gunner on the ZX81 but I could really do with a scan or pi…

    Hi guys,
    After some assist, don't know if anyone has a copy of Digital Integration's Night Gunner on the ZX81 but I could really do with a scan or picture of the cassette inlay or cover. Can anyone help?

    Cheers
    jdanddiet jdanddiet August 2012 Chit chat
  • ZX81 price?What's the going rate for a boxed working ZX81. Not sure if I'm going to sell it. Just curious as to what it may be worth.

    What's the going rate for a boxed working ZX81.
    Not sure if I'm going to sell it. Just curious as to what it may be worth.
    pmc280 pmc280 August 2012 Sales
  • OpenSE BASIC disassembly?The [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]OpenSE BASIC[/URL] page provides a source code listing, however it doesn't really…

    ... origin of the code that follows them: zx80, zx81, sam, skel, ... se. All other code is legally ... want to provide proper source code comments because reverse engineering ... us a properly commented source code.

    Perhaps ...
    Einar Saukas Einar Saukas September 2012 Development
  • 8-bit art "Video Games vs. Real Life"Stumbled across [URL="http://twistedsifter.com/"]an interesting website[/URL]. Among the different sections I came across these pics, there are [URL…

    ... .com/2011/02/video-games-vs-real-life-art-aled-lewis ...
    ZnorXman ZnorXman September 2012 Chit chat
  • #3 of MONOCHROME ZX81 magazine (PDF, autumn)Hi. I think all subscribers already got their paper copies of the "Monochrome" magazine - stuff about ZX81 machines - so it should be safe to put i…

    ... " magazine - stuff about ZX81 machines - so it should ... -
    [url]http://zx81.republika.pl/monochrome_issue_3_magazine_zx81.pdf[/url ... contains parts for all ZX81 configs, including unexpanded ... />
    [img]http://zx81.republika.pl/monochrome3zx81.jpg[/img ...
    Yerzmyey Yerzmyey October 2012 Sinclair Miscellaneous
<1…12131415161718…34>

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