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<1…12131415161718…34>
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... make any use of Z80 assembly is mostly cargo cult programming ... [CODE]
    ;Biturbo 2 loading routine
    ;by Giovanni "G.B ... br /> CALL 65355 ;Calls loading routine
    LD IX, 24576 ;Address ... br /> CALL 65355 ;Calls loading routine
    EI
    JP ...
    Alessandro Grussu Alessandro Grussu October 2013 Development
  • Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…

    ... answer is... oh crap! Z80 assembly... again! Hadn't touched the ... need to isolate any particular routine from that?

    Basically ...
    skagon skagon October 2013 Hardware
  • Retro Event 26 October - photo's etcYesterday the first Retro Event was held in Elst, The Netherlands. It was a succes, which counts for both console sales floors and homebrew area. Ge…

    ... the midi out routine from the rom into the assembly, so it ...
    bverstee bverstee October 2013 Sinclair Miscellaneous
  • Retro Event 26 October - photo's etcYesterday the first Retro Event was held in Elst, The Netherlands. It was a succes, which counts for both console sales floors and homebrew area. Ge…

    ... the midi out routine from the rom into the assembly, so it ...
    chev chev October 2013 Sinclair Miscellaneous
  • z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…

    ... LAST_K is located. The interrupt routine writes the keypresses to that ... you can create one interrupt routine to run both, one after ... which is a simple interrupt routine provided in im2.lib that ... tried reading the keyboard with assembly but z88dk says it cant ...
    Alcoholics Anonymous Alcoholics Anonymous October 2013 Development
  • z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…

    ... to do it all in assembly it says 'unexpected end of ... - d1d3 ------- JP to im2 service routine (im2 table filled with 0xd1 ...
    Alcoholics Anonymous Alcoholics Anonymous October 2013 Development
  • z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…

    ... /> and the super fast pushy routine to copy shadow screen to ... ://wordpress.animatez.co.uk/programming/assembly-language/z80/z80-library-routines ... ://wordpress.animatez.co.uk/programming/assembly-language/z80/z80-library-routines ...
    tstih tstih October 2013 Development
  • "Press any key" detectionWhat would be the simplest way to detect if *any* key is being pressed? No LAST_K trickery, I can't rely on that. It has to be reading the keyboard p…

    ... why I wanted a tiny assembly self-contained routine.
    na_th_an na_th_an November 2013 Development
  • "Press any key" detectionWhat would be the simplest way to detect if *any* key is being pressed? No LAST_K trickery, I can't rely on that. It has to be reading the keyboard p…

    ... I wanted a tiny assembly self-contained routine.[/QUOTE]

    They ... you are calling another library routine that already uses in_WaitForNoKey, then ... . That said, no other library routine (except in_Pause) will use in_WaitForNoKey ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Development
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... -s $Z80EXECNAME.opt
    # create assembly listing with symbol table
    routine

    [CODE] // Loading Engine ...
    dbolli dbolli November 2013 Brand new software
  • Cross platform developmentI'm just vaguely considering supporting a few more retro 8 bit platforms for something I have in mind to do. Just Z80 and 6502 really, but that cove…

    ... I had never coded in assembly language before ;) I only had ... and modify the interrupt service routine, and add or modify a ... IBM) and rewrote the init routine in C, looked at the ...
    Paradigm Shifter Paradigm Shifter November 2013 Development
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... executed by the engine initialization routine.

    Although ... ZX BASIC interfaces). In Assembly, you have the choice ... at an incorrect location
    // (routine NIRVANA_sprite).
    //
    // ... ]NIRVANA[/B] directly in Assembly, it may be useful ...
    Einar Saukas Einar Saukas December 2013 Brand new software
  • Z80AsmI've been using the Z80 PC Assembler 1.2 by Peter Hanratty and found that the RST 8 instruction assembles to 200. It should be 207. Ret Z is 200 wh…

    ... ? I'm thinking, get some assembly code that you are fairly ... times with a self-modifying routine which has modified the wrong ...
    Battle Bunny Battle Bunny December 2013 Development
  • DIM DATA and the likeSo...I'm trying to work out arrays in BASIC a bit more and have knocked up the following quick test bed to fiddle about with before trying anything m…

    ... if you can write a routine and then see what it ... ]
    You can see the assembly output in most C compilers ... , but that can make the assembly code more confusing.

    assembly output you'll probably come ...
    David Jones David Jones January 2014 Sinclair Basic
  • DIM DATA and the likeSo...I'm trying to work out arrays in BASIC a bit more and have knocked up the following quick test bed to fiddle about with before trying anything m…

    ... you really want to learn assembly...!

    ...


    "Assembly language is NOT difficult. But ... You can actually construct an assembly language that works with just ... write a primitive sprite routine and do loads of game ...
    David Jones David Jones January 2014 Sinclair Basic
  • Which Windows Emulator will support SPECTRA?I want to start crossdeveloping games for SPECTRA, but it is a pain in the ass to save the TAP on USB Stick or SD Card and test them on my eMac SP Em…

    ... ]You probably saw my bitshifting routine to calculate attribute address from ...
    BloodBaz BloodBaz January 2014 Emulators
  • Help with File Compressor by Mladen PopovicHi, I'm trying to compress BombJack (MCM) and transfer it to a +3 disk (Yes I own the original game :) ). I'm unsure about the addresses to enter in…

    Hi all, I have an assembly question with this now..
    < ... games, with the megaLZ depacking routine and the PUTRAM code. This ...
    Speccy_James Speccy_James February 2014 Development
  • Programming again with the ZX SpectrumI am going to take a blast at programming for the Spectrum again. Its bee a long time since I have done this. I need to refresh my memory and maybe l…

    ... an emulator.

    For assembly, read up on the Spectrum ... layout, read up on some assembly examples, and get stuck in ... write your own character-print routine instead of using the one ...
    joefish joefish February 2014 Sinclair Basic
  • Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …

    ... call to a procedural graphics routine that replaces the sprite (bitmap ... it yourself? Just post the assembly here by tomorrow afternoon, and ...
    Timmy Timmy March 2014 Games
  • Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…

    The routine isn't particularly efficient - because ... reduced in size. But because assembly is so quick compared to ... call the "print 8x8 block" routine any time you wanted to ... that would need a different routine and the graphics stored differently ...
    Morkin Morkin March 2014 Development
  • How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…

    ... doing any other programming. Z80 assembly looks crazy when you first ... dissect someone else's lengthy routine.

    For a game ...
    Morkin Morkin March 2014 Development
  • How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…

    ... that made the possibility of assembly programming temptingly close and within ... results and learn something about assembly... I find using a PC ... a simple sound routine combined with a simple routine for putting text ...
    kgmcneil kgmcneil March 2014 Development
  • JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…

    ... cc or CALL cc a routine loading HL and use a ... ) ; do the jump to the routine

    ; these are the ... forum. The question was Z80 assembly related which is more general ...
    PokeMon PokeMon March 2014 Development
  • Spectaculator & GENS4Im using Hisofts Gens 4 assemler with Spectaculator and getting an error: [B]Bad Name[/B] when I try to assemble and save the file to a TAP. Assemb…

    ... then call the ROM save routine to save it out (start ... you asked for.
    The assembly will then continue from the ...
    Jon Needle Jon Needle April 2014 Emulators
  • SpecBAS / SpecOS documentationHi, I just find out about SpecBAS and I was so impressed by the new functions while retaining compatibility with ZX Basic that I've been playing wit…

    ... to code a sprite routine in z80 assembly, specially with the particularities ...
    AE.Vasconcelos AE.Vasconcelos June 2014 Sinclair Basic
  • Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.

    ... /> I think trying to learn assembly program starting from ROM disassembly ... out about how ROM printing routine (RST 16 or RST $10 ... start reading introductory book about assembly in ZX Spectrum (eg. Tony ...
    TK90XFan TK90XFan July 2014 Development
  • Manic Miner loading screen adjustmentHad half an hour spare earlier and wanted to try a few things. Always like to learn anyways even now. [URL="http://www.yellowspider.co.uk/speccy/Man…

    ... we're "calling" it from assembly (note 'call' not 'jr' or ... />
    LD DE, 32768 ; loader routine

    LD A, 255 ...
    spider spider August 2014 Games
  • Can anyone explain this result?This little sub-routine isn't always doing what it's supposed to; ie. transfer the value from SEED to VARS. Can anyone explain why? I've put in the P…

    ... uk/]The Incomplete Spectrum ROM Assembly[/url] for pointing the ... The program using that sub-routine effectively does this at ... /> [list]
    [*]The POINTERS routine updates the 14 system variables ... .
    [*]The VAL routine calls MAKE_ROOM to allocate space ...
    Battle Bunny Battle Bunny August 2014 Sinclair Basic
  • ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…

    ... . In effect, it splits the assembly process in two to allow ... yes, in C your asm routine had to be kept mostly ... code base written in [B]assembly[/B] language. The fact that ...
    Alcoholics Anonymous Alcoholics Anonymous September 2014 Emulators
<1…12131415161718…34>

Latest Posts

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