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<1…17181920212223…34>
  • Alien8 style 3D Tiles - TheoryHello, Are there any articles etc explaining how to do 3d style tiles, i.e. when to redraw those in front etc. I would guess you would need to work…

    ... in fact a full size back buffer being used.

    back buffer, individual character cells are completely drawn in an 8-byte ...
    robpearmain robpearmain August 2006 Development
  • SupadriveHere's an MDR image of Supadrive. Works with Spectaculator, but I haven't tested it with any other emulators. [url="http://www.superfudge.demon.co.u…

    ... how to glue the sectors back together into an MDR, as ... /> Done. There was convert 137923 byte(s) in 4 file(s ...
    jp jp August 2006 MIA/STP/SDP
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... and The Empire strikes back , Durrells Turbo Esprit ... PHA ; BY SAVING LOW BYTE ON STACK.
    LDA ...
    PLA ;PULL LOW BYTE FROM STACK
    INY ; ... ),a ; the values back in a reversed order< ...
    JamesD JamesD September 2006 Sinclair Miscellaneous
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... impossible to implement without microcode back then.
    [/quote]

    byte opcodes were constructed such that ...
    Alcoholics Anonymous Alcoholics Anonymous September 2006 Sinclair Miscellaneous
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... 30),Y ; THEN GET HIGH BYTE AND
    2 DEY ; ... /> 4 PLA ;PULL LOW BYTE FROM STACK
    2 INY ... a fast byte copy (for copying a back buffer to ... per byte and it's possible to fill a back ...
    Alcoholics Anonymous Alcoholics Anonymous September 2006 Sinclair Miscellaneous
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... lie in the same 256-byte page. Are you not? (Better ... /> This should start getting things back more towards the 2-2 ...
    Alcoholics Anonymous Alcoholics Anonymous September 2006 Sinclair Miscellaneous
  • What are people using TommyGun to do?So I was just wondering what people are using TommyGun to do?

    ... was held in a single byte. Can TG produce customizable data ... will be able to revert back to your previous image palette ...
    Kiwi Kiwi September 2006 Development
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... from tape, if an attribute byte is changed, flashloading aborts and ... , selected normal speed and gone back the game as bloody loaded ...
    pigdog pigdog September 2006 Emulators
  • Programs detecting Spectrum modelsHi. I'm curious about knowing how some speccy games detect if they are runnning in a 128k or 48k model. What tricks can be used to make this in a Spe…

    ... 128k page and write a byte somewhere into paged memory area ... same address. Finally, you switch back to the original page and ... (second) value because the original byte gets simply overwritten. In assembly ...
    baze baze October 2006 Development
  • Currah MicrosourceHi Anyone here got a Currah Microsource ? I have one, its one of the original eval units complete with 'draft' manual. Just interested to see how …

    ... which first copies every 512th byte of ROM out to the ... how to page the page back in OR (b) save the ...
    BloodBaz BloodBaz October 2006 Sinclair Miscellaneous
  • Floating point representationI'm planning on picking up the [url=http://matt.west.co.tt/category/spectrum/openzxrom/]OpenZXRom[/url] project from where I left off a few months ba…

    ... integer results are always converted back into integer format, just as ... be keeping the Sinclair 5-byte format for compatibility) but either ...
    gasman gasman October 2006 Development
  • How are people developing?Are most coding on actual HW or under emulation, or cross developing?

    ... br /> Debugger: None

    Back in the 80s and early ... the machine.

    Going back even further, somewhere on tape ... without using an assembler. Each byte was painstakingly poked into RAM ... the translation tables in the back of the manual. It ...
    jonathan jonathan October 2006 Development
  • How are people developing?Are most coding on actual HW or under emulation, or cross developing?

    ... br /> Debugger: None

    Back in the 80s and early ... the machine.

    Going back even further, somewhere on tape ... without using an assembler. Each byte was painstakingly poked into RAM ... the translation tables in the back of the manual. It ...
    rich_chandler rich_chandler October 2006 Development
  • Xenon TriOxide (Xeo3)I just wanted you all to know that a new cross platform game has started development (well the +4 version has been around a while, but my colleague f…

    ... :
    .BYTE %01111110, %00000000
    .BYTE %00011111, %10000000
    .BYTE %00000111, ... %11100000
    .BYTE %00000001, % ... for scrolling by different speed, back buffer, masked sprites
    ...
    Fikee Fikee November 2006 Development
  • EightyOne 0.43Hmmm, 'twas round about July I fell asleep and only came round t'other day - honest gov! Anyway, I thought I'd better whip out a quick release and p…

    ... AWOL - can we have it back, pretty please? And for extra ... register is High or Low byte first?

    [QUOTE]One ...
    MikeW MikeW November 2006 Emulators
  • Ways to use double buffering in basicI was meddling with woody's print stream code where you can print characters at any pixel location on screen. I was playing with 12 sprites, very ann…

    ... copy from that extra memory back to screen$. As the name ... memory banks required for each byte copied.

    A specialized ...
    Alcoholics Anonymous Alcoholics Anonymous November 2006 Sinclair Basic
  • Scrolling Loader CounterPlease can someone help me with writing a scrolling counter for a loading system. I like the Hewson counter so i`ve taken the font from zynaps loade…

    ... /> ld a, (de) ;take a byte of gfx
    inc de ... back
    [/code]
    NOW is value "(gfx_of_number)" pointing to second byte ...
    Fikee Fikee November 2006 Development
  • Rst #38This, as far as I know, is the ROM procedure that does the keyboard check. (and, at the same time, is what's being executed by interrupt in IM 1 mode…

    ... .
    LD ($5C7,HL ; Place back in FRAMES1.
    LD A ... ) ; otherwise increment FRAMES3 the third byte.

    ; Now save the ...
    DEATH DEATH November 2006 Development
  • tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…

    ... /> ld a,(de) ; get first byte in pixel row
    ldd ... (hl),a ; write first byte into last byte of pixel row

    dec h ; put hl back into character row
    ; convert ...
    Alcoholics Anonymous Alcoholics Anonymous November 2006 Development
  • Urgent Help needed to fix this: calling all machine code gurusI am currently trying to write tutorials on the amazing Orfeus music composer by Proxima which allows you to do multi channel music through the beepe…

    ... the routine in to 35072, byte-by-byte... then when the routine ... swap the old code back in, byte-by-byte.

    Basically you ... 'll change the interrupt mode back to IM 1, and it ...
    icabod icabod November 2006 Development
  • Where are they now?I often wonder whats hapenned to a lot of the old 8-bit software companies. You never hear anymore of companies such as Gremlin, Elite, Ocean or Mas…

    ... they lost but they bounced back.
    I often wonder where ... such as Mikro-Gen. Bug Byte, Microsphere and Digital Integration.
    zx1 zx1 December 2006 Games
  • Wanted: z80 asm routines...for the Sam. This call goes out to Colin and others who know how it should be done. If you look on the Sam C disk you can see the implementation…

    ... quick answer till i'm back sitting at the computer properlly ... to where you need (512 byte sectors, with 2 bytes at ...
    Quazar Quazar January 2007 Development
  • Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …

    ... background tiles are only blitted back over the boundaries that have ... as I can copy one byte ( like using unsigned long copying ...
    DonkeyPong DonkeyPong January 2007 Development
  • Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …

    ...
    push af ; just put back ret address, stack all cleaned ... as I can copy one byte ( like using unsigned long copying ...
    Alcoholics Anonymous Alcoholics Anonymous January 2007 Development
  • TZX revision 1.20 finalSince everybody seems to agree with the last propositions, the specification for the TZX file format revision 1.20 now becomes final and you can find…

    ... the saving routine splits the byte stream into smaller units (bits ... loading routine assembles the units back into bytes.
    Mikie Mikie January 2007 Emulators
  • TZX revision 1.20 finalSince everybody seems to agree with the last propositions, the specification for the TZX file format revision 1.20 now becomes final and you can find…

    ... the saving routine splits the byte stream into smaller units (bits ... loading routine assembles the units back into bytes.[/QUOTE]

    Philip Kendall Philip Kendall January 2007 Emulators
  • 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 …

    ... br />
    byte 1: return block
    byte 2: return address ...
    byte 3: sprite data ... block
    byte 4: sprite ... - VSYNC - active screen is now back buffer, previous active screen will ...
    DonkeyPong DonkeyPong January 2007 Development
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... things should work in the back of your mind but worry ... />
    [code]
    defb === put byte(s) here
    defw === put ...
    Alcoholics Anonymous Alcoholics Anonymous January 2007 Development
  • 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. …

    ... grips with strings and functions back in my BASIC days.
    byte version.

    Edit: Helpful ...
    48K 48K February 2007 Sinclair Basic
  • Dragon Adventure - Level 9Following on from the Level 9 poll, I really don't think that [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0009688"]Dragon Adventure[/URL] …

    Having trawled back through all the Level 9 ... did have a good sized back catalogue for the Acorn Atom ... it also had a Bug Byte advert on the same page ...
    RichB RichB February 2007 Infoseek database
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Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
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    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
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