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<1…12131415161718…34>
  • Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…

    Try this:
    [code]
    org 32880

    ; ... /> start:
    ; initialize self-modifying code
    di
    ld (exit ... />
    ; read 12 bytes from linear buffer (right side)
    buffer2 ...
    Einar Saukas Einar Saukas April 2016 Development
  • Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…

    ... restrict lookup table location:
    [code]
    ; lookup table (can ... start:
    ; initialize self-modifying code
    di
    ld (exit ...
    ; read 12 bytes from linear buffer (right side)
    buffer2 ...
    Einar Saukas Einar Saukas April 2016 Development
  • Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…

    ... the case even if your code for the routine and ... the code nice and small, as well as performing conversion from linear ... [/b]


    [code]
    ld bc,(buffer_size)

    jp pe,copy_loop[/code]
    Mysterion Mysterion April 2016 Development
  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... as your buffer copy is linear, this 'crossing the beams' is ... [/img]

    Details:
    - Code is running above #8000, in ...
    RMartins RMartins June 2016 Development
  • TommyGun's getting a Debuggerhttp://youtu.be/B_kZVRvYV98 I have always wanted to debug the programs I write in TommyGun using TommyGun instead of the debuggers in emulators. …

    ... default to 0, asssuming a linear buffer.
    [/quote]
    No ... all controlled from the image code generators. Plus you have the ... the abilitiy to change the code generated for these.
    So ... you can check the generated code from within the editor.
    Kiwi Kiwi July 2016 Development
  • Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…

    ... a beginner asks why their code to clear the screen is ... , and particularly Sinclair BASIC, machine code is going to be heaps ... it or not, writing "bad" code can actually help to learn ... can also be a flat linear block of memory cleared in ...
    AndyC AndyC September 2016 Development
  • So where is the random number in the Speccy ?So I am messing around with ZX Spectrum Assembler and I want a random number. I looked up previous posts and one of the links said that random number…

    ... their titles:

    [code]SpecialFXRng
    push hl
    DEFB #97,#FF,#80[/code]
    [/quote]

    linear congruential -- too expensive as ... Coming up with some code that seems to generate random ...
    Alcoholics Anonymous Alcoholics Anonymous November 2016 Assembler
  • Sound adviceHappy New Year everyone! I want to write some more Spectrum games this year and I want to improve the sounds in my games. Can anyone recommend a "qui…

    ... that I can then export code with it to be put ... taking advantage of the non-linear nature of the output volumes ...
    Alcoholics Anonymous Alcoholics Anonymous January 2017 Development
  • Database model ZXDBRecently, I have been trying to figure out how to provide my contribution to whoever takes over WoS archive rework next... So I came up with this: …

    ... application to "convert" this linear information into a hierarchical ... br />
    * Code simplicity: The code to load tables into ... /> The difference is, the code to build a data structure ... operators (like optimized C++ code). Then heap fragmentation wouldn ...
    Einar Saukas Einar Saukas January 2017 Announcements
  • I live and learnThanks to Einar's ZXDB link I found under the Books folder and English sub directory a PDF file named 'The Century Computer Programming Course for Z…

    ... compact one can make ones code.

    For me, the ... paper in step by step linear form with no compaction. Then ...
    mik3d3nch mik3d3nch June 2017 BASIC
  • 1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…

    ... you'll be given a code to start part 2.
    The game has a (almost) linear structure. You start as Mariano ...
    JuanF. Ramirez JuanF. Ramirez January 2018 Games
  • 1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…

    ... the mine, you get the code for the Great Tower which ... load in and enter the code from the mine to play ... Tower is a lot more linear than the mine, multiple routes ...
    dm_boozefreek dm_boozefreek February 2018 Games
  • INC not working as expected in LoopHi, i have been working on this for around 2 weeks now and Ive read myself into a hole. I am trying to increment HL. HL is referencing a display …

    ... we could see the original code we could work out why ... day out... here is the code with the slight modifications but ... , its just a series of linear instructions to me? Followed by ...
    hedge hedge April 2018 Assembler
  • INC not working as expected in LoopHi, i have been working on this for around 2 weeks now and Ive read myself into a hole. I am trying to increment HL. HL is referencing a display …

    ... its just a series of linear instructions to me? Followed by ... location. It then overwrites your code with a series of instructions ... on the exact time your code stops overwriting itself (including ... />
    The snipped of code I suggested earlier:

    Ast_A_Moore Ast_A_Moore April 2018 Assembler
  • Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…

    ... 32x96 with Einar's amazing code engine:
    https://spectrumcomputing.co ... can chop up your game code to run in precisely equal ... only 32x48, read from a linear buffer.

    Checked out ... sure if this uses a linear buffer to read attrs from ...
    Dax Trajero Dax Trajero August 2019 Development
  • Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…

    ... it will naturally slow down code that's running a little ... . engine doesn't use a linear buffer of colour data. The ... is written in amongst the code, for speed. But it includes ...
    joefish joefish August 2019 Development
  • how do i make a character rotate in very small degrees?so i would take the letter a and rotate it degree by degree until it has gone round 360 degrees. only 8x8 pixels is necessary. machine code or basic …

    ... 8x8 char. When you apply linear (1 pixel at a time ... fast, why not simply writing code to "test and move" each ...
    tstih tstih September 2019 Development
  • Microdrive logic flow.Hi all, I've finally gotten my hands on an Interface 1 and Microdrive to continue my project, and have been analyzing the Microdrive with a logic …

    ... with the default Interface 1 code/rom.

    I haven ... to map sectors. Also the code allows multiple reads to get ... file usage in a typical linear fashion.

    This leaves ...
    cj7hawk cj7hawk March 2021 Hardware
  • Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…

    ... /> is a lot simpler in code (less opcodes), than

    linear raster anyway. so i guess ...
    Luny Luny October 2021 Hardware
  • AY PlayerI'm working on a frontend DB and would like to include an option that plays Speccy music/fx via AY Player. Does any1 know if there is a .dll that I…

    ... , or wiill I have to code my own? If there is ...
    Chris Chris January 2002 Emulators
  • Idea about improving EmulatorHi, I got a bright idea today how to improve such excellent emulators a bit more. Okay, disassemblers are available in nearly every one new released …

    ... and power to optimize the code for speed or memory usage ... , so the compiled code should be better than if ... . The problem: I can not code very well on PC... So ...
    LCD LCD April 2001 Emulators
  • Why so few open source Spectrum emulators?A couple of days ago I started to look into converting an existing Spectrum emulator to Pocket PC (mainly the iPaq) and ran into problems directly. T…

    ... find one with published source code (obvious because of the similarities ... emulators does not publish source code. Why is that the case ... be able to publish source code without losing any money at ... most emulators to publish source code and try to promote the ...
    Anders Anders January 2001 Emulators
  • EliteCan any of you good people tell me how to use the LENSLOC that is supplied with Elite.I have the game loaded at the ENTER CODE screen but cannot work…

    Can any of you good people tell me how to use the LENSLOC that is supplied with Elite.I have the game loaded at the ENTER CODE screen but cannot work out the code.

    Thanks

    John
    john john January 2002 Games
  • How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…

    ... but when i tried machine code i found it just a ...
    Andy Gurr Andy Gurr January 2002 Games
  • Night GunnerThis is similar to the problem I had earlier with that Turtles game- maybe you can solve this one too. I load the game up, and I am asked to give a c…

    ... am asked to give a code number. Obviously I haven't ...
    Spector Spector January 2002 Games
  • Bug in Nemesis the WarlockI've noticed a bug in Nemesis the Warlock that prevents the game from being completed. On level 7, both on the 48K and 128K versions, the sprite repr…

    ... via Multiface to alter the code in order to ensure proper ...
    Alessandro Grussu Alessandro Grussu December 2001 Games
  • Interface for PC ZXSee last entry of former TOPIC. I'm working on the interface. Info about it on MISCELLANEOUS Author: Arjun (---.bng.vsnl.net.in) Date: 08-13-01 …

    ... trying to master z80 machine code for 20 years and even ...
    Dr BEEP Dr BEEP November 2001 Games
  • Theatre EuropeAnyone know the nuclear release code for Theatre Europe

    Anyone know the nuclear release code for Theatre Europe
    gez gez October 2001 Games
<1…12131415161718…34>

Latest Posts

  • I bought an accoustic guitar. How do you play it?
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  • Happy 40th Birthday to the Amstrad CPC464!
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  • Fixed Speccy Software. And which games remained unfixed?
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