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  • Fast division in machine codeHi Does anyone know what is the fastest way to divide a 16 bit number by 24 in machine code. Derek [ This Message was edited by: dmsmith on 2004-0…

    Hi

    Does anyone know what is the fastest way to divide a 16 bit number by 24 in machine code.

    Derek

    [ This Message was edited by: dmsmith on 2004-09-24 20:04 ]
    dmsmith dmsmith September 2004 Development
  • +2 ramdisk - access in machine codeHow can you access the ramdisk in machine code? I've got a +2, and it seems the ramdisk has never been properly utilised. It would be a handy little…

    How can you access the ramdisk in machine code?

    I've got a +2, and it seems the ramdisk has never been properly utilised.
    It would be a handy little area to use.


    Thanks in advance,

    --

    cat
    cat cat October 2006 Development
  • IF and control flow in machine codeHi everyone, Basic has a nice control flow like if statements. How can these be done in machine code since i cant find anything thanks

    Hi everyone,

    Basic has a nice control flow like if statements.
    How can these be done in machine code since i cant find anything

    thanks
    Robin Robin September 2010 Development
  • LOAD "" CODE in machine code/store 128 bank dataHow do you LOAD "" CODE from machine code? I have written the following MC routine that fits into a REM statement in a basic program. I want to cal…

    How do you LOAD "" CODE from machine code?

    I have written ... fits into a REM statement in a basic program.

    code in bank 6?

    [CODE]ld a,64 ...
    ld (23739),a ;hide loading messages

    ld a ...
    daveysludge daveysludge October 2014 Development
  • How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…

    ... routines which do the job in thirds (as is
    how ... the display is mapped in memory), which can
    clear ... (30 bytes).
    However, this machine code routine, when I tested
    pixels are stored in memory) then that would be ...
    bobbyjaykid bobbyjaykid July 2007 Development
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... can learn the basics of machine code in half an hour by coding ... to program in machine code!

    CHAPTER 1 - Create a machine code function that ... BASIC
    Machine code programs are a series of bytes in the Spectrum ...
    bigjon bigjon November 2009 Development
  • 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…

    ... simple BASIC routine (below) to machine code, but to no avail.

    Many thanks in advance...
    daveysludge daveysludge July 2012 Development
  • Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…

    ... be much faster in machine code.. all the cool kids use machine code.."

    [/code]

    These are the codes for loading values into ... registers..

    [code]
    3E ...
    wibble wibble August 2013 Development
  • Machine CodeOk i had a spectrum when i was younger and only used it for playin games and typing simple BASIC programs - i mean really simple! Things like 10 Pri…

    ... i want to do something in machine code. I've seen a lot ... the loaders and seein the code was all blocked out or ... ) - how did they do that in basic?! lol im just curious ... any info, especially about the Machine code
    Alex
    alexsut alexsut July 2002 Sinclair Miscellaneous
  • All my Machine Code Books Up For GrabsSee [url=http://www.worldofspectrum.org/forums/showthread.php?p=139192#post139192]here[/url] for details. You too can learn to program the Speccy in…

    See [url=http://www.worldofspectrum.org/forums/showthread.php?p=139192#post139192]here[/url] for details.

    You too can learn to program the Speccy in Machine Code
    robpearmain robpearmain July 2006 Development
  • New Discussion Group? Sinclair Machine Code/AssemblyHello, What do people think about whether we should have a new discussion group relating to machine code for Z80? We have a Sinclair Basic discussi…

    ... new discussion group relating to machine code for Z80? We have a ... but not one about assembly code/machine code for the spectrum.
    < ... are a number of postings in the forums which could fall ... is so simply and fast in machine code.

    For me, Z80 ...
    BloodBaz BloodBaz May 2007 Sinclair Miscellaneous
  • ccompletly baffeled machine codeHi everyone, BEFORE you ask i have not asked help for loads of problems i have recently now encountered and i figured the problems out myself, hones…

    ... a character at this position in machine code. But thats where the problem ... starts. its done in a really difficult way. I ... cant just plug in the x co because the ... point on the screen grid in machine code. For example, 5,4 is ...
    Robin Robin September 2010 Sinclair Miscellaneous
  • Machine code sub routinesHi everyone, I have noticed that in machine code you can call different "preset" routines like rst 16 or something, or call 6533... where can i fi…

    ... />
    I have noticed that in machine code you can call different "preset ...
    Robin Robin October 2010 Sinclair Basic
  • PLOT and DRAW in machine codeHow do you go about it? If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it? I wouldnt k…

    How do you go about it?

    If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it?

    I wouldnt know where to start... :confused:
    daveysludge daveysludge January 2012 Development
  • Help a small machine code game.Hello all you clever wossers are there any GOOD?? games that are in machine code (no basic apart from the loader,rnd usr bit) but are very small ma…

    ... any GOOD?? games that are in machine code (no basic apart from the ... small

    max 4k in size

    or a ...
    ASH-II ASH-II January 2014 Games
  • 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-…

    ... my little attempt at learning machine code on the Spectrum made me ... of tape loading time, and you re-type your code, this time ... I was learning machine code on a real spectrum back in the 80s ... for people who were learning machine code back in the 80s?

    memrah memrah September 2013 Sinclair Miscellaneous
  • First steps in Z80 machine codeI never got into machine code much back when I had a speccy, as I didn't have any development tools at the time. The only machine code I'd previousl…

    I never got into machine code much back when I ...
    The only machine code I'd previously done in the past was ... to the basics of Z80 machine code.

    I ... don't laugh at the code, I'm a Z80 ... learning the basics of Z80 machine code, seems like loads of ...
    Digital Prawn Digital Prawn July 2007 Development
  • storing machine code in BASICApart from putting m/c above RAMTOP, which means that it has to be POKEd or LOADed separately after the BASIC program; or putting it in a REM, which …

    ... method, described in Toni Baker's "Mastering Machine Code", which provides ... LOAD "filename" CODE mcpos,machine_code_length:
    PRINT "machine code starts at ";mcpos ... STOP
    9999 REM *** MACHINE CODE STARTS
    AFTER THIS LINE ...
    Battle Bunny Battle Bunny August 2010 Sinclair Basic
  • storing machine code in BASICA couple of years ago I posted a routine for storing machine code between PROG & VARS, based on an idea in Toni Baker's "Mastering Machine Code". Thi…

    ... storing machine code between PROG & VARS, based on an idea in ... Toni Baker's "Mastering Machine Code". This enables ... ):

    REM INSTALL MACHINE CODE... with GO TO 9161
    CODE space
    9161 CLEAR ...
    Battle Bunny Battle Bunny January 2012 Sinclair Basic
  • plus d machine code loader issueas many of you know i have done / been doing quite a few tr-dos recracks for the plus d but i have come into a bit of a problem the plus d machine co…

    ...
    the plus d machine code loader requires you to have ... has 30+ levels to load in, i can obviously only ... is a bit of code to put before the ... it so i can continue loading files

    hope ... ramblings and can point me in the right direction
    ...
    djgarf djgarf April 2013 Sinclair Miscellaneous
  • 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…

    ... machine), one can do a silly trick like this:

    [code ... ),1

    ret[/code]

    Ta-da ... BASIC, it all falls in a heap; symptoms ... a total crash. Loading BASIC as code from the 128 ... it's the return from machine code that doesn't.
    ...
    stephenw32768 stephenw32768 September 2013 Development
  • Machine Code in 30 minutes - car gameWotcha folks, 30 years on and I'm still struggling with Machine Code. I'm going through the 30-minute tutorial on the Chuntey blog and it's all made…

    ... I'm still struggling with Machine Code. I'm going through ... caps to v
    in a,(c)
    cp ... space to b
    in a,(c)
    cp ... br /> dec l
    dontmove[/code]

    Unfortunately, there ... into BC, but what is 'IN A,(C)' actually doing? ...
    Tobo Tobo August 2014 Development
  • machine code basicsWondered if anyone can help me out. I have been playing round with some disassemblers (Zeus). And Machine code loaders. All I want to do is print my…

    ... with some disassemblers (Zeus). And Machine code loaders.

    All I ... help me out.

    In other non- z80 examples there ...
    Duxbuz Duxbuz August 2001 Sinclair Miscellaneous
  • Machine code loaderI was wondering how people wrote games. On the trail to this knowledge I discovered a machine code loader in basic, and also z80 assemblers. Which i…

    ... this knowledge I discovered a machine code loader in basic, and also z80 ... />
    I am sadly interested in this stuff, wonder if anyone ...
    Duxbuz Duxbuz August 2001 Sinclair Miscellaneous
  • Z80 Machine CodeHello again chaps, Hope I'm in the right category for this question - I suppose it could be under 'Game Creation / Programming'. hehe Ive got far t…

    ... ,

    Hope I'm in the right category for this ... a childhood ambition, and learn machine code.

    I got familiar ...
    the_misguided_fool the_misguided_fool August 2003 Games
  • Wanted: Machine Code Sprites and Graphics BookWould anyone be willing to either sell or swap this book. Its full title is Machine Code Sprites and Graphics for the ZX Spectrum : A complete guide…

    ... full title is

    Machine Code Sprites and Graphics for the ... />
    Cover is light blue in colour with a picture of ...
    dmsmith dmsmith August 2004 Wanted
  • any tips for learning spectrum machine code?hello there, I have some experince programming in basic, both sinclair 48+ (just need to recall most of what i learnt :D ) and Quickbasic. anyway i a…

    ... , I have some experince programming in basic, both sinclair 48+ (just ... . anyway i am intrested in learning spectrum machine code, can you give me ...
    mestor mestor August 2005 Development
  • Machine Code QuestionHi All Not sure if this is the right place for this but it seems closest. Am starting to read the Toni Baker Intro to Machine Code book and its ver…

    ... the Toni Baker Intro to Machine Code book and its very interesting ... is, and the hex machine code discussed in the book plus the relevant ...
    Womble Womble February 2006 Sinclair Basic
  • Basic or Machine code?Hopefully the correct area of the site to post this question. Anyways, I have got hold of several books on programming my spectrum, and I was wonderi…

    ... should learn to program in Basic, or machine code? Any help gratefully received ...
    Spadge Spadge March 2006 Development
  • In Machine Code, what is the quickest way to sort bytes?I am playing around with some ordering of sprites, where I want to order them by vertical position. I used some Rodnay Zaks code to order some bytes…

    ... some bytes, and it works in "descending" order. I am ... having difficulty ordering them in ascending order (Changing "jr ... c,noswitch" gets it stuck in an endless loop.
    < ... an earlier thread)

    [code]

    org 8000h
    robpearmain robpearmain August 2006 Development
<1234567…34>

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  • Fast division in machine codeHi<br /> <br /> Does anyone know what is the fastest way to divide a 16 bit number by 24 in machine code.<br /> <br /> Derek<br /> <br /> [ This Mess…
  • In Machine Code, what is the quickest way to sort bytes?I am playing around with some ordering of sprites, where I want to order them by vertical position.<br /> <br /> I used some Rodnay Zaks code to orde…
  • +2 ramdisk - access in machine codeHow can you access the ramdisk in machine code?<br /> <br /> I've got a +2, and it seems the ramdisk has never been properly utilised.<br /> It would…
  • First steps in Z80 machine codeI never got into machine code much back when I had a speccy, as I didn't have any development tools at the time.<br /> <br /> The only machine code I…
  • How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will<br /> clear the first 20 rows of the Spectrum's display<br /> (or any number of rows or columns) . …
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
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