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  • Toni BakerApologies if this has been asked and answered before; a search (both WoS and Google) doesn't bring up many clues. I spent many hours as a youth try…

    ... trying to fathom Z80 machine code. I didn't get very ... Baker's classic Mastering Machine Code on the ZX Spectrum.
    last reference I can find to ...
    KenD KenD August 2013 Sinclair Miscellaneous
  • Hardware description - DivIDE interface[B][U]DIVIDE interface / DivIDE 2k11[/U][/B] [B][U]The main description[/U][/B] DIVIDE is IDE interface with own external memory. Thanks to very goo…

    ... as four 8kB ram pages. Last page(3) can be used ... mode
    D7 = conmem mode[/CODE]

    Control port function ... /> [B]IDE ports:[/B]
    [CODE][U]ADRESS READ WRITE[/U ... 24-27 LBA 24-27[/CODE]

    Adressation of all ...
    velesoft velesoft August 2013 Hardware
  • Hardware description - MULTIFACE 3[B]Hardware description - MULTIFACE 3[/B] This is description of MF3 clone, because I can't find more about original interface. Schematic and PAL ch…

    ... (addressing x00xxxxx 00111111) return last data writed to port # ... (addressing x01xxxxx 00111111) return last data writed to port # ... (addressing x10xxxxx 00111111) return last data writed to port # ... equations with named signals:
    [code]
    ; Mulfiface 3 – ...
    velesoft velesoft August 2013 Hardware
  • Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…

    ... & a Groovin' machine code screen routines from Your Spectrum ... utterly confusing and wonderful reverser code.

    On ... PUSH BC ; do first, now last on stack
    PUSH HL ... horizontal


    [/code]

    Now.. Dr Beep ...
    MatGubbins MatGubbins August 2013 Development
  • Routine for Currah speechI'm currently writing a routine for the Currah that will provide speech during a game. A timer is set to initiate the speech every 50 cycles of the …

    ... someone can help?

    [CODE]org 40000
    ld a ... hl to 1 below the last byte in buffer
    ld ...
    tim2 defb 0 ;timer2[/CODE]
    daveysludge daveysludge August 2013 Development
  • Xbox 360 Support to Last to 2016[url]http://m.uk.ign.com/articles/2013/09/04/xbox-360-support-to-last-to-2016-includes-100-new-games[/url] Seems like a good amount of time. Didn't …

    ... /04/xbox-360-support-to-last-to-2016-includes-100-new ...
    mrmessy mrmessy September 2013 Chit chat
  • Squishing code up nice and small then unsquashing it in assemblyI refer of course to data compression. I've done a search and there are lots of good compressors, but I can't seem to find one that works in assembl…

    ... a short bit of assembly code (exactly what I'm after ...
    R-Tape R-Tape September 2013 Development
  • Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…

    ... of showing how efficient the code is.

    I've ... to determine how fast the code runs?
    rune rune September 2013 Sinclair Miscellaneous
  • Machine code/Assembly language back in the dayHello. Back in the 80s when I was a kid, I didn't learn Z-80 machine code, but I was always curious about it. Just recently I decided to explore Z-…

    ... attempt at learning machine code on the Spectrum made ... reset and editing the code, which is still waiting ... assembler window. However, writing code on a real Spectrum ... crashing in case bad code is executed? Did they ... who were learning machine code back in the 80s ...
    memrah memrah September 2013 Sinclair Miscellaneous
  • Converting Basic code into machine codeIm just interested to know if I can converter a game I've written in basic into Machine code, Is their a program that can do this??

    Im just interested to know if I can converter a game I've written in basic into Machine code, Is their a program that can do this??
    nonsenceinbasic nonsenceinbasic September 2013 Development
  • 128 BASIC-compatible way of loading BASIC as code?On a 48K Speccy (or from 48 BASIC or USR 0 mode on a 128K machine), one can do a silly trick like this: [code];; load a 4000 byte BASIC program ld i…

    ... trick like this:

    [code];; load a 4000 byte BASIC ... (23620),1

    ret[/code]

    Ta-da, BASIC ... total crash. Loading BASIC as code from the 128 BASIC interpreter ... 's the return from machine code that doesn't.

    stephenw32768 stephenw32768 September 2013 Development
  • Tape handling on a +3I'm seeing some strange behaviour when loading a basic program from the Loader option of a +3. I'm currently using the fuse emulator (I don't have an…

    ... program:

    [CODE]
    10 PRINT "hello ... world"
    [/CODE]

    then save ... using:

    [CODE]
    SAVE "t:"
    ... "autorun" LINE 10
    [/CODE]

    and save ... the program is the last error rather than " ...
    u6c87 u6c87 October 2013 Hardware
  • Rendering clipped glyphSometimes you need to render a glyph of arbitrary size to the screen. And clip it. For example: drawing a mouse cursor means combining drawing of a…

    ... function like this -

    [CODE]draw_clipped_glyph(
    glyph_t *glyph,
    last column) mask which you will ... using AND to first and last column. For example if ... naturally points to it after last glyph data has been ...
    tstih tstih October 2013 Development
  • LOAD "" CODE - Blind Alleycame across [B]Blind Alley[/B] in the archives, and both tzx/tap versions only have Bytes header, no Basic loader with autostart - please, anyone, ho…

    ... the archive that need LOAD "" CODE?
    de Vandemar Croup de Vandemar Croup October 2013 Games
  • Last Chance to Get QL Today Last Issue and DVDLast chance to get your copy of the last ever issue of QL TODAY - [url]http://smsq.j-m-s.com/[/url] (orders must be placed by 19th November) - includ…

    ... get your copy of the last ever issue of QL TODAY ...
    rwap rwap November 2013 Sinclair Miscellaneous
  • Beepola 1.07A new version of Beepoa, v1.07, is now available for download from:- [url]http://freestuff.grok.co.uk/beepola/[/url] (1.63MB zipped exe, no installe…

    ... kindly sending me the source code for this engine from Cobra ... 100 bytes for the player code, depending on the options selected ... the 3 years since the last release of Beepola.

    ccowley ccowley November 2013 Announcements
  • The LAST DivIDE 57c[SIZE="4"] I thought it would be nice to make a record of this historic moment: soldering my last DivIDE 57c board. [IMG]http://benophetinternet.nl/…

    ... this historic moment: soldering my last DivIDE 57c board.


    Resulting in this last batch:
    [IMG]http://benophetinternet ... "]the video of finishing the last black DivIDE 57c [B]here ...
    bverstee bverstee November 2013 Hardware
  • Jag - a cousin of the Speccy - is 20?[B]Jag is 20 - The Movie (ATARI JAGUAR 20th anniversary)[/B] [URL="http://www.youtube.com/watch?v=z4hXwTF43qY"]http://www.youtube.com/watch?v=z4hXwTF…

    ... the JAGUAR. The two processors, code named Tom and Jerry, were ... the Sinclair scene for the last couple of weeks if not ...
    QLvsJAGUAR QLvsJAGUAR December 2013 Sinclair Miscellaneous
  • Downloading code to physical hardwareHi folks, Back in the day, my devkit was a TRS-80 and I had a simple connector device from the TRS-80 parallel (printer) port to the expansion bus o…

    ... ways to get PC developed code over to a physical Spectrum ...
    David Jones David Jones December 2013 Development
  • My Rendition of Horace to the RescueHi Spectrum World, I have spent the last 2 month writing my rendition of Horace to the Rescue. Horace to the Rescue was a planned game but it was ne…

    ... />
    I have spent the last 2 month writing my rendition ... loading screen or any source code or game plans.

    wiper2001 wiper2001 December 2013 Announcements
  • My Rendition of Horace to the RescueHi Spectrum World, I have spent the last 2 month writing my rendition of Horace to the Rescue. Horace to the Rescue was a planned game but it was ne…

    ... />
    I have spent the last 2 month writing my rendition ... loading screen or any source code or game plans.

    wiper2001 wiper2001 December 2013 Brand new software
  • Self modifying code ??I made a game in C that was mostly accessing arrays and using FOR NEXT loops, I ran out of memory, so I was thinking would it be possible to use sel…

    ... possible to use self-modifying code so that say 20 FOR ... NEXT loops use the same code?
    or 20 array look ... ups can use the same code?

    When using C ... write out all the machine code necessary to do loops and ...
    slenkar slenkar December 2013 Development
  • Assembly code auto optimiserFor my Finders Keepers Plus project I'm considering writing an Assembly code auto optimiser. Way back when I wrote the original FK I considered optim…

    ... like this

    [code]
    call SomeSub
    ... ret
    [/code]

    could be ... br />
    [code]
    jp SomeSub
    [/code]

    ... br />
    Example
    [code]
    ; My source
    ;< ...
    David Jones David Jones December 2013 Development
  • Seeing the code/In emulatorHello, Here is my Noob question. Is it possible to see the code for these games in an emulator? To be able to study the code? I am using the Sp…

    Hello,

    Here is my Noob question. Is it possible to see the code for these games in an emulator?

    To be able to study the code?

    I am using the Spectaculator emulator on a PC.

    Thanks,

    M
    MadR13D MadR13D December 2013 Sinclair Basic
  • Get rid of 'Bytes:' when loading codeHow do you hide the 'Bytes:' when loading code? I've tried saving as CHR$ 22 + CHR$ 6+ CHR$ 0 (a blank part of the loading screen) but it still appe…

    How do you hide the 'Bytes:' when loading code?

    I've tried saving as CHR$ 22 + CHR$ 6+ CHR$ 0 (a blank part of the loading screen) but it still appears at 3,0 and disrupts my screen!
    daveysludge daveysludge December 2013 Sinclair Basic
  • Code to test if a rectangle is in a rectangle[SIZE=3][FONT=Calibri]I am looking to write some code that will check if a rectangular shape is outside or overlapping a second rectangle. If the sma…

    ... am looking to write some code that will check if a ... have concocted the following sudo code to achieve this outcome:[/FONT ... , has anyone got some Z80 code that already does this? I ...
    Mr Millside Mr Millside December 2013 Development
  • Code analysis on SNA filesI was wondering if anybody has attempted to convert all TZX/TAP files into SNA files? I would prefer SNA files as they're easy to use and search from…

    ... /> Basically the first bit of code analysis I've been doing ...
    Jimmy Jimmy January 2014 Development
  • About how z88dk generates code and makes room for variables.When you attempt to code games for the 128K models using z88dk in C you need to somewhat control where variables are stored in memory. I thought tha…

    ... ;
    unsigned char *script;[/code]

    If ... for example:

    [code] script_result = 6;
    script_something_done = ... = 8;
    script = 9;[/code]

    I can see ... looking at the generated code:

    [code]ld A, $ ...
    na_th_an na_th_an January 2014 Development
  • Born again Speccy user with problemsHello all, Firstly I'd like to say a big hello - this is my first post! When I was 8 or 9 or so my dad bought a ZX Spectrum 48K and a whole bunch o…

    ... my Speccy, and how machine code had always beaten me. Now ... 48K Spectrum off of ebay last week.

    I took ...
    namtip namtip January 2014 Hardware
  • Santa's Xmas Capers wrong ending in rzx archive?I played this game last weekend and completed it in the same way that the rzx from rzxarchive is finished, but now, by reading the instructions, and …

    I played this game last weekend and completed it in ... is supposed to be the last one, you have to drop ... somebody can check the ASM code of the game? :)

    Ivanzx Ivanzx January 2014 Games
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