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<1…18192021222324…34>
  • Elite / MagratheaI remember one of the magazines (And my memory was convinced it was Your Sinclair) ran an April Fool's tip advising of a hidden galaxy in Elite. Thi…

    ... column was held in a byte of data, so what Sandy ... ... I last looked at that back in 98.

    Andrew
    andrew_rollings andrew_rollings March 2007 Games
  • Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…

    ... mace, its 2 bytes, 1st byte is pickup code #E9 to ... #EB, 2nd byte is what tile to draw ... a check for #E9. Tracing back further and I found a ...
    FrankT FrankT March 2007 Development
  • Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…

    ... table below shows 1st byte tile, 2nd byte top left of tile ... , 3rd byte top right, 4th byte bottom left, 5th byte bottom right ... and put it on the back of the gun, but the ...
    FrankT FrankT March 2007 Development
  • Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…

    ... />
    I've run some back of the envelope calculations for ... time to latch the next byte from screen memory, and then ...
    Winston Winston March 2007 Sinclair Miscellaneous
  • IconsI'm not sure whether this is the right place to post it, but I will... Anyway, for some reason today I got so bored and cheesed off I decided to pla…

    ... than welcome!

    [I]Back to Skool (Teachers) (Microsphere)
    Back to Skool (Hayley & Eric) ( ... (Mastertronic)
    Manic Miner (Bug Byte)
    Midnight Resistance (Ocean Software ...
    TechnicianSi TechnicianSi March 2007 Announcements
  • Anybody fancy coding this?blah de blah de blah Please ignore, poting error.

    ... AF, AF' to bring back the original byte while preserving the test ...
    Geoff Geoff March 2007 Development
  • Anybody fancy coding this?blah de blah de blah Please ignore, poting error.

    ... AF, AF' to bring back the original byte while preserving the test ...
    Matt_B Matt_B March 2007 Development
  • SpecEmu 2.4 releaseSince SpecEmu has been at 2.4 beta for as long as I can remember I think it's about time I made a proper 2.4 release for its users :) Major new feat…

    ... .
    Having been temporarily forced back to W98se, I`ve noticed ... line by hand for 16 byte width, took me ages. Going ...
    FrankT FrankT March 2007 Emulators
  • Question For The Emulator AuthorsWhy do $ED $44, $ED $4C, $ED $54, $ED $5C, $ED $64, $ED $6C, $ED $74, $ED $7C all disassemble to opcode NEG and $ED $45, $ED $55, $ED $5D, $ED $65, …

    ... one of each the two byte combinations should disassemble to each ... />
    This allows to compile back disassembled text to code which ...
    Vladimir Kladov Vladimir Kladov April 2007 Emulators
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... /> CCCCC = horizontal char / byte (0-31)
    [/code]< ... ex de,hl ;get pointer back to start

    byte copy (without the repeat ... LDIR takes 21 per byte copy. If this matters ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • "Lost" 48K expansionToday I dug up my Speccy after more than 10yrs of inactivity. I bought it as a 16K in 1983, than I had expanded to 48K and never had problem. Until t…

    ... at address 32768 (the first byte of upper RAM) which indicates ... to a single data line back to the Z80, so that ... to read or write a byte.

    Therefore, if you ...
    Winston Winston April 2007 Hardware
  • My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…

    ... they have an extra opcode byte which adds that extra 4 ... reach it. I always come back to stuff and wonder why ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Development
  • Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…

    ... as fast as possible. The back buffer was cleared with the ... fixed point with the low byte holding the fractional part. Trig ... 8 data and 1 attr byte for each used block. Room ...
    obo obo April 2007 Games
  • Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…

    ... as fast as possible. The back buffer was cleared with the ... fixed point with the low byte holding the fractional part. Trig ... 8 data and 1 attr byte for each used block. Room ...
    rich_chandler rich_chandler April 2007 Games
  • Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…

    ... as fast as possible. The back buffer was cleared with the ... fixed point with the low byte holding the fractional part. Trig ... 8 data and 1 attr byte for each used block. Room ...
    zxspecticle zxspecticle April 2007 Games
  • Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…

    ... as fast as possible. The back buffer was cleared with the ... fixed point with the low byte holding the fractional part. Trig ... 8 data and 1 attr byte for each used block. Room ...
    ChuckieEgg ChuckieEgg April 2007 Games
  • Reading the border colorI am building a snap-button to my ZX-PC Interface. Is there a way to read the bordercolor which is set by an OUT-command. (and please don't tell me …

    ... register and store the whole byte, thus having even a second ... />
    You can then read back the colour from the register ...
    Marcelo Marcelo April 2007 Hardware
  • TZX 1.20 block 0x18 questionHi All I am in touch with G?nter Woigk the author of Zxsp emulator for mac os X and we both wondering something about block 0x18 (Sorry if that ques…

    ... bits used in the last Byte"? This will add confusion to ... ) - but was decided against it back then. It will probably encode ... was a number of years back when I tried these...
    Tom-Cat Tom-Cat April 2007 Emulators
  • TZX 1.20 block 0x18 questionHi All I am in touch with G?nter Woigk the author of Zxsp emulator for mac os X and we both wondering something about block 0x18 (Sorry if that ques…

    ... bits used in the last Byte"? This will add confusion to ... ) - but was decided against it back then.[/QUOTE]

    This ...
    Philip Kendall Philip Kendall April 2007 Emulators
  • Games Collection for Sale on EBayHi There's a pretty big collection of my Speccy games up for sale on EBay if anyone's interested: [URL="http://search.ebay.co.uk/_W0QQsassZmatthew.…

    ...
    Avalon (Broken case)
    Back to Skool
    Barbarian (Melbourne ... Dizzy
    Manic Miner (Bug Byte) x 2
    Marsport
    netallstar netallstar May 2007 Sales
  • Games Collection for Sale on EBayHi There's a pretty big collection of my Speccy games up for sale on EBay if anyone's interested: [URL="http://search.ebay.co.uk/_W0QQsassZmatthew.…

    ...
    Avalon (Broken case)
    Back to Skool
    Barbarian (Melbourne ... Dizzy
    Manic Miner (Bug Byte) x 2
    Marsport
    spectbeginner spectbeginner May 2007 Sales
  • PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…

    ... each time you play them back) is non-binary data - i ... possible but a 1:1 byte representation. Thus the data of ... not required to be stored byte-wise with a 256 symbol ...
    Kio Kio May 2007 Emulators
  • Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…

    ... - UDGs are stored as one byte per pixel row, rather than ... one byte per pixel, so copying the ... by an offset of one byte would cause things to scroll ... by one byte (POKE 23765,88 to get it back) so the ...
    gasman gasman May 2007 Sinclair Basic
  • Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…

    ... word magic word against 1 byte is not really something better ... bytes and in TZX 1 byte. In the end not much ... you said - people can convert back and forth between them - the ...
    Tom-Cat Tom-Cat May 2007 Emulators
  • Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…

    ... loop, first part rotates first byte
    ld a,(hl) ... ;load the first screen byte into A
    rr ... hl),a ;write earlier rotated byte to screen
    inc ... hl ;go to next byte to the right
    ld ... br /> dec hl ;move back one character to the left ...
    Dr BEEP Dr BEEP May 2007 Development
  • Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…

    ... from original 64 byte machine code to 49 byte. Regarding speed it ... br /> inc de ;next graphic byte
    djnz loadloop ;decrease ... screen byte to the right
    dec hl ;move back one ... times, for all coloums in byte

    moveonecharacter
    ...
    Rickard Rickard May 2007 Development
  • Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…

    ... from original 64 byte machine code to 49 byte. Regarding speed it ... br /> inc de ;next graphic byte
    djnz loadloop ;decrease ... screen byte to the right
    dec l ;move back one ... times, for all coloums in byte

    moveonecharacter
    ...
    Dr BEEP Dr BEEP May 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…

    ... and then copy the results back to the display file. ... Ultimate uses a full screen back buffer in its isometric games ... the back buffer where sprites are moving.

    Since the byte ... cells are copied from a "back buffer". However tearing becomes much ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Development
  • Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…

    ... as fast as possible. The back buffer was cleared with the ... fixed point with the low byte holding the fractional part. Trig ... 8 data and 1 attr byte for each used block. Room ...
    wokani wokani June 2007 Games
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... value "int_seed" is the two-byte integer stored at address 23672 ... display file stores pixels one byte after the other horizontally on ... of each fatted up UDG byte.

    [code]
    *(sbuf ... decreased by one to get back to its original display address ...
    Alcoholics Anonymous Alcoholics Anonymous June 2007 Development
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Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
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