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<1234567…34>
  • 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…

    ... learn the basics of machine code in half an hour by coding ... code programs are a series of bytes in the Spectrum's memory.
    In ... are now at memory address 33000 by clicking in the main Spin ... see the funny order in which this memory area is mapped onto ...
    bigjon bigjon November 2009 Development
  • Loading a screen in to memory...Hi Folks, I want to load a SCREEN$ in to memory and save it out to RAM disk without it being displayed on the screen. I am worried about over writi…

    ... to load a SCREEN$ in to memory and save it out to ... memory so would the following work:

    [CODE]100 LOAD “SCREEN” CODE ... /> 110 SAVE !”SCREEN” CODE RAMTOP+1,6192[/CODE]

    Where ... RAMTOP is the address held in ...
    Paddy Coleman Paddy Coleman December 2010 Sinclair Basic
  • 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 ... call the ROM's LOAD "" CODE routine, nothing fancy headerless loaders ... worth of 128 code in bank 6?

    [CODE]ld a,64 ... />
    ;LOAD 128 bank 6 code

    ;LOAD main game ...
    daveysludge daveysludge October 2014 Development
  • BB Code in posts - How do I change the font size and color?Below the text input field it says you can use BB code in your post. [style size="15px"]You can't [/style] [style color=#FF0000]No really, you ca…

    ... says you can use BB code in your post.

    [style ... ]

    [code]10 PRINT "BB Code Partial Implementation"[/code]

    [b ... .wikipedia.org/wiki/BBCode]BB code[/url] in your post[/quote]
    Scottie_uk Scottie_uk April 2017 WoS/Forum Issues
  • 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…

    ... MF3 memory. This IN instruction connect MF3 memory(yes, but for code in MF3 memory is ... this feature without effect because MF3 memory is ... and connect MF3 memory. This IN instruction disconnect MF3 memory(yes, disable MF3 ...
    velesoft velesoft August 2013 Hardware
  • Aggravating problem with screensI've rewritten my Sam C runtime emulator code ( well almost ) to allow me to use my own routines for blitting sprites onto the screen, storing tiles …

    ... structures and bits of code in specific memory pages. Then you write ... 't specify which memory segments certain C code should occupy you ... is placement of subroutines in specific memory banks so that they ... you have a pointer to memory in some 64k segment, how ...
    Alcoholics Anonymous Alcoholics Anonymous January 2007 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... flicker" and "tearing" in machine code applications is to change the ... e.g.

    [code]
    loop:
    ...
    ... ....
    jp loop
    [/code]

    You can ... 3) Run your code in uncontended memory. Access to memory addresses 16384 to ...
    BloodBaz BloodBaz May 2007 Development
  • WorldbarThis morning I programmed the last piece of artificiel intelligence to my game WORLDBAR and played it in the train to work. I won/lost in 50&#37; of…

    ... two versions too, although in gameplay they will be the ... MINIGAMECOMPO.

    BTW: the code is quite different from the ... minigamecompo where the code was
    entered in a REM line ... where the newer version has the code in higher memory ...
    Dr BEEP Dr BEEP November 2007 Games
  • What was the best 16K Spectrum GameOK, I'm putting up a poll, but its not really about the poll, but a chance to focus on the 16K gems. (The poll, taking those with the best WoS rating…

    ... during development I have the code in upper memory and the variabels also ... the code to lower memory, but the variablestorage is kept in upper memory.
    Therefore it will only run in 48K ...
    Dr BEEP Dr BEEP February 2009 Games
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... any attempt at executing code in contended memory (the region 16384-32767 ... are contended memory pages that can be in place at 49152 ... didn't crash when executing code in contended memory). Thus, you get ... games in 128K mode where a ...
    Jmk Jmk January 2010 Games
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... and any attempt at executing code in contended memory (the region 16384-32767 ... didn't crash when executing code in contended memory). Thus, you get games ... missing something here. Why does code executed in contended memory cause a crash??
    Alcoholics Anonymous Alcoholics Anonymous January 2010 Games
  • Game Boy Advance EmulationI've finally got myself a GBA flash cartridge and programmer. I've put ZXAdvance on it and I like the setup. Mildly disappointed that it doesn't ha…

    ... previous release, and somehow left in the readme. At the time ... to deal with the contended memory, so in that sense I suppose ... sure that everything that is in the menu is supported. Some ... . That extra bit of code in the memory I/O to handle banking ...
    thehive thehive January 2010 Emulators
  • Professional Adventure Writer +3Hi everyone. I've got a collection of old PAWs adventure files on +3 disk that I want to be able to have a look at to see if there's anything that c…

    ... /ZX/spectrum.html"]SNA loader in .TAP format[/URL] could be ... an emulator, save PAW+3 in .SNA format, import the .SNA ... if PAW +3 has code in other memory banks this idea won't ...
    John Elliott John Elliott April 2010 Wanted
  • Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…

    ... ?
    If you write your code in Basic, that would be more ... code in assembler, you can, under certain conditions, use the rest of memory ... . You can even place your code in screen memory :) It is used very ...
    Ralf Ralf April 2010 Emulators
  • Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…

    ... code in assembler, you can, under certain conditions, use the rest of memory ... can even place your code in screen memory :) It is used very ... rarely, but I have seen it in ... as a collisiontable.
    In my Videopacemulator the screen is ...
    Dr BEEP Dr BEEP April 2010 Emulators
  • CPU speed measure possible?Is it possible to measure the CPU speed and shows the result on a LED display? Micky

    ... frequency] cycles, it will execute in exactly 1 second [I]wall ... count.

    Devil is in the details: interrupts of [I ... disabled, can't run the code in contended memory, and coding a loop ...
    RetroTechie RetroTechie May 2010 Hardware
  • Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …

    ... looks i could manage fit code in less memory than i estimated. revisited ... track - ending titles - to be in memory pernamently.
    bad news: still ...
    Fikee Fikee November 2010 Development
  • Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …

    ... looks i could manage fit code in less memory than i estimated. revisited ... track - ending titles - to be in memory pernamently.
    bad news: still ...
    Rebelstar Rebelstar April 2011 Development
  • Robocop 3 and Spectrum 128K toast-rackHi all, we are going on with the tests on the new 128K emulator for the V6Z80p board, and we have found something odd: Robocop 3 (designed for the 12…

    ... it crash by only executing code in uncontended memory (the flickering still occurs ...
    Jmk Jmk June 2012 Emulators
  • A few questions about ZX Spectrum assemblyHi, I have a few questions about ZX Spectrum assembly language programming: - What's the best assembly tool for ZX Spectrum? I tried a bit the ZXSpi…

    ... can't find the code in the memory.
    My ... program was:
    [CODE]ORG 30000
    RET
    [/CODE]
    I tried to run ... /> In BASIC i checked the code with:
    [CODE]LET ... A=PEEK 30000: PRINT A[/CODE ...
    Zerg Zerg October 2013 Development
  • A few questions about ZX Spectrum assemblyHi, I have a few questions about ZX Spectrum assembly language programming: - What's the best assembly tool for ZX Spectrum? I tried a bit the ZXSpi…

    ... I can't find the code in the memory.
    My program was ... :
    [CODE]ORG 30000
    LD HL ... address.
    In BASIC i checked the code with:
    [CODE]LET A ... back in the day prepared software. I.e. Assemble source code on ...
    spectrumlinux spectrumlinux October 2013 Development
  • Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…

    ... read or write that memory for two out of ... is lessened. A machine code program running from the ... you place your machine code in higher memory on a 48K machine ... has to write to screen memory, it will be slowed ... is, and how much memory it needs for variables to ...
    joefish joefish October 2016 Sinclair Basic
  • Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…

    ... I safely put my own code in contented memory, as long as I ...
    colonel32 colonel32 December 2016 Brand new software
  • Whats the name of the chip that replaces the ULA?I can't find it through searching using the above title. I distinctly remember reading about a new type of programmable chip that can be set to behav…

    ... contains just four NAND gates. In theory, any logic circuit ... data that is stored in a reprogrammable memory, someone with an ...
    One important point: the code that is used to program ... it looks like software code. And the code in the memory that is used ...
    1024MAK 1024MAK April 2018 Chit chat
  • Editing in-game UDG'sI have just started playing an RPG that was in Sinclair User in 86'. The game is called Forest of Long Shadows and was excellent. You can find it on …

    ... an RPG that was in Sinclair User in 86'. The game ... is a slight bug in that the nasties that ... screen in UDG's but they dont. Looking through the code I ... can see that there is Data to create the UDG ... eaiest way of editing UDG's in a basic program rather ...
    stupidget stupidget November 2003 Sinclair Miscellaneous
  • Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…

    ... possible to run machine code from the memory area used by the ... you were really out of memory and some part of screen ... to black/black, load some code in the display area and run ...
    Rickard Rickard May 2007 Development
  • What memory pages are being used in a +3DOS disk operation?To make a long story short: what pages are in use by +3DOS while doing read operations from the disk drive? Now, for the details, for those interest…

    ... block to be loaded in "extended" memory. To avoid side effects ... ), and then, from machine code and interrupts disabled, I copied ... . My routines for relocating code into pages starts at 25001 ... use nearly all the available memory in all pages) succesfully? Do ...
    mcleod_ideafix mcleod_ideafix March 2011 Development
  • Setting breakpoints in source code to make debugging easierAfter two years I've resumed my Speccy coding project. I'm porting a yet "unported" game from C64/Atari to 48k Spectrum using Z80 assembler. At the m…

    ... " emulator for running my code. Occasionally I also use Fuse ... of instruction or macro in the code, which when encountered, ... a very long delay loop in the code in the "interesting place", ... values of registers and memory, continuing the code execution is not ...
    arttu arttu August 2019 Development
  • Solution for overwritten stack in 48k SNA filesIt has been known for quite some time now that the 48k SNA file format has one serious fault, which is described in the file formats section on the W…

    ... fault, which is described in the file formats section on ... bytes of data (or program code) in RAM and therefore the snapshot ... encountered this problem in the game Knight Lore, in which storing PC ... it first reads in 49179 bytes of registers and memory, pops the ...
    Anonymous Anonymous October 2002 Emulators
  • TASM, Z80 and Spec emusHi! Having some novice questions here regarding TASM and writing machine code for the Speccy emus... Now I have configured TASM into my EditPlus and…

    ... mnemonics as well as code (in hex) and the ... with the program in hex code (as ascii characters ... code as that is (I think) what ends up in memory ... memory cells, i.e if I would like to code UDG data in ... the actual asm file instead of having it in ...
    ekoman ekoman July 2004 Development
<1234567…34>

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HitBox

Word Docs Hits
code 41.6K 91.2K
in 401.9K 810.5K
udg 1.5K 2.5K
memory 21.8K 32.5K

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