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<1…21222324252627…34>
  • Text Adventure Vector graphicsI've often wondered what the memory cost of graphics in a text adventure was. If you were to hazard a guess, how many bytes would it be possible to …

    ... and can drawn by very short routine)
    about data for drawings ...
    Fikee Fikee August 2010 Development
  • New Version of BeepolaA new version of Beepoa, v1.05, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/[/URL] (806KiB download) It's a fair…

    ... variety of reasons: my TAP loader loads the code into the ... [/i] - ensures that the player routine and tune data are in ... memory, and that the player routine is looking at the correct ... /> Yeah. My Music Box player routine is 18% smaller than the ...
    ccowley ccowley August 2010 Announcements
  • Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…

    ... 1/16th of the routine there and are missing ... the last bit of the routine.

    You ... memory tradeoff - an unrolled routine runs faster at the ... the expense of time. Short routines benefit a lot ... br />
    ; divide routine starts here, with the body ...
    Winston Winston August 2010 Sinclair Basic
  • The most unique game loaderFor me it has to be Technician Ted, when the stripes give way to walking men and a timer.

    ... then during the game loading, routine draws it a line by ... top.
    I found this loader from old yugoslavian magazine, fixed ...
    Pegaz Pegaz August 2010 Games
  • Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …

    ... see talks about a flashing routine, but I'm still confused ... port, or an accelerated tape loader, etc etc. As I said ...
    guesser guesser August 2010 Hardware
  • Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …

    Hi Folks,

    Well I have been further refining my double height character program i.e. the ZX BASIC version. I am rather chuffed with the following version as it uses the RAM disk on the 128K Spectrum.

    Program 1 generates the ...
    Paddy Coleman Paddy Coleman September 2010 Sinclair Basic
  • Pretty CrashesTo make a 48K spectrum crash spectacularly and beautifully enter the following into basic. Also works on a 128k in 48k mode though not quite as prett…

    ... favourite was hitting the loading routine at a particular place:
    loader!)
    Not really a crash ...
    Scottie_uk Scottie_uk September 2010 Sinclair Basic
  • Pretty CrashesTo make a 48K spectrum crash spectacularly and beautifully enter the following into basic. Also works on a 128k in 48k mode though not quite as prett…

    ... favourite was hitting the loading routine at a particular place:
    loader!)
    Not really a crash ...
    spider spider September 2010 Sinclair Basic
  • compressing basicI thought I'd ask here instead of the basic forum.. in the sense of giving me 1 command line, and NOT the whole listing joined up etc. and it uncom…

    ... look at how the LOAD routine sets up BASIC when you ... this information for the BASIC loader for the Spectranet.

    Winston Winston September 2010 Development
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... that the ROM beeper routine has very innacurrate short durations for lower ...
    ccowley ccowley September 2010 Announcements
  • Using real 3.5" floppies to load a +3 game (emulated)Is it possible to load a Spectrum +3 or Amstrad CPC 664/6128 game with the use of 3.5" floppy disks (providing the emulator can support real disk mod…

    ... , but be sure not to short between the screw and the ... games that use their own loader code. Writing to 3.5 ...
    obo obo September 2010 Hardware
  • Help! Reverse engineering a Spectrum game[deleted]

    ... /> 07 - A fast clear screen routine using the stack if possible ...
    17 - A line draw routine, optimised when drawing one pixel ... - A fast screen address lookup routine, that is; pixels to display ... . I would personally ignore the loader and work with a raw ...
    ASM ASM October 2010 Development
  • Help! Reverse engineering a Spectrum game[deleted]

    ... routines, thus adding a new routine when/if it is needed ... began:

    01 - Turbo loader with protection and tape counter ...
    ASM ASM October 2010 Development
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... ROM beeper routine does not work well for very short beeps (i ...
    ccowley ccowley October 2010 Announcements
  • Zero (aka Ziggy) 0.4.5The 0.4.5 preview build is available for er... preview. There are still some bugs and glitches to iron out but I have taken various suggestions on bo…

    ... that prevents a custom loader from being useful with such short blocks.
    Philip Kendall Philip Kendall October 2010 Emulators
  • Zero (aka Ziggy) 0.4.5The 0.4.5 preview build is available for er... preview. There are still some bugs and glitches to iron out but I have taken various suggestions on bo…

    ... or care what the ROM loader is doing. They save a ... ) for loading with standard ROM loader. The casual user is not ... a block with a custom routine that doesn't use a ...
    FrankT FrankT October 2010 Emulators
  • Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …

    ... lower pitches using the BEEP routine in the ROM, as the ... at all because the ROM routine isn't capable of producing ... in pitch for such a short duration. You need to either ...
    ccowley ccowley October 2010 Announcements
  • Feedback need about a platform gameI've developed a few iPhone games based on 8-bit computer games and am now working on a stealth platformer for the iPad. I believe that 8-bit gamepl…

    ... to break up that regular routine organisation of the platforms, or ... exposure to such regularity... In short, your game, (the platform environment ...
    kgmcneil kgmcneil October 2010 Announcements
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... />
    Application screen capture routine to real-time create Run ... point audio pitch scaling routine based on Hermite polynomials:< ... /> fcomip st0,st1
    ja short .interpolate

    fsub ... . If you study the routine 'pickup_tsk' I can tell ...
    ASM ASM October 2010 Development
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... define in a couple of short paragraphs. I can tell you ... I have to call the routine I'm testing several thousand ...
    ASM ASM October 2010 Development
  • Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …

    ... some TAB processing into the routine as the O.C.P ... memory by a BASIC stub loader. I removed the RANDOMIZE USR ... when I wrote that scroll routine back in 1990 so please ...
    ASM ASM November 2010 Development
  • later today......[IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs909.snc4/72268_172079126142549_100000213882336_641184_4866225_n.jpg[/IMG] [IMG]http://sphotos.ak.f…

    ... " with rebirthing. It takes some short time usually, but sometimes it ... chance for faster screen redrawing routine? I also believe that there ...
    Ralf Ralf November 2010 Games
  • later today......[IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs909.snc4/72268_172079126142549_100000213882336_641184_4866225_n.jpg[/IMG] [IMG]http://sphotos.ak.f…

    ... " with rebirthing. It takes some short time usually, but sometimes it ... chance for faster screen redrawing routine? I also believe that there ...
    ASM ASM November 2010 Games
  • later today......[IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs909.snc4/72268_172079126142549_100000213882336_641184_4866225_n.jpg[/IMG] [IMG]http://sphotos.ak.f…

    ... " with rebirthing. It takes some short time usually, but sometimes it ... chance for faster screen redrawing routine? I also believe that there ...
    CodenameV CodenameV November 2010 Games
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ... then the actual boot code routine. Maybe the snapshot could be ... better to break into the loader and trap the initial call ...
    ASM ASM November 2010 Sinclair Miscellaneous
  • Floating bus on 128K models[b]Background:[/b] i need run code with interrupt enabled but i need use stack instruction to maximize performance in copy/shift/mirror routines. dur…

    ... stack abuse. Within the interrupt routine I use the fast one ... all my routines are generally short enough to operate between interrupts ... would have been the interrupt routine directly.
    joefish joefish November 2010 Development
<1…21222324252627…34>

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