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<1…21222324252627…34>
  • Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…

    ...
    [code]
    ; Z80 delay routine
    ; by JB, license GPL ... /> nop

    ; bit0 set : 20 T
    ; bit0 reset ... never taken

    ; bit1 set : 18 T
    ; bit1 reset ... /> nop

    ; bit2 set : 20 T
    ; bit2 reset ...
    Alcoholics Anonymous Alcoholics Anonymous June 2007 Development
  • wootjust got my first nigerian bank scam email, i feel so in touch with modern culture.

    ... /> Upon Maturity, I Sent A Routine Notification To His Forwarded Address ... the Remaining 10% Will Be Set Aside For Expenses Incurred With ...
    beanz beanz June 2007 Chit chat
  • 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…

    ... the spectrum's character set. So in this C ... of the spectrum's character set. The type declared for ... location of the character set. On returning to basic ... line). 2- the scroll routine will be dealing with ... the spectrum's character set. By adding 8 times ...
    Alcoholics Anonymous Alcoholics Anonymous June 2007 Development
  • 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…

    ... code bytes that set print position, justification ...
    // \x14\xAA set attribute to AA
    // ... \x01 set center flag
    // \x02 set right justify flag ... a display address routine in the spectrum ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • A thought about Top GunI've been playing a bit of Top Gun earlier, and I'm not convinced it should be classed as a vector 3D game, as I'm seeing really nothing that would m…

    ... the same limbs, only one set of frames is needed.
    routine to squash the picture onscreen ...
    The Starglider The Starglider July 2007 Games
  • Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…

    ... space. Other than the fastest routine using tables and calculating the ... ,ter_1 ; 2 / 7,12
    SET 3,H ; H = 01001yyy 2 ... /> RET ; 1 / 10
    ter_3: SET 4,H ; H = 01010yyy 2 ...
    Metalbrain Metalbrain July 2007 Development
  • How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…

    I should add that the routine I just gave only clears the pixels, it doesn't clear the attributes. You'd need to extend the routine if it was necessary to set all the attributes to a particular colour.

    Cheers, Simon
    hldswrth hldswrth July 2007 Development
  • How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…

    ... ]I should add that the routine I just gave only clears ... to extend the routine if it was necessary to set all the ...
    Dr BEEP Dr BEEP July 2007 Development
  • 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…

    ... address 0xd4d4 (interrupt service routine entry)
    wpoke(0xd1d2 ... () is running in the interrupt routine
    [/code]
    < ... you know your interrupt routine only changes those ... service routine scroll_isr().

    scroll_isr() is set up ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • 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…

    ... />
    I thought that my routine is a bit slow, and ... debugger. In spectaculator, you can set breakpoints at the start of ... count before and after the routine in the debugger window. Subtract ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... with the bright attribute apparently set) is a good sign that ... . You'll also get M RAMTOP no good BASIC errors for ...
    Winston Winston July 2007 Hardware
  • Game ideaThinking of a game that could enter the Minigame compo I came to the following idea for a game, although it might not fit 1K or 4K: A mazed snake ga…

    ... using EI and the ROM routine.

    [code]
    xor ... ; LASTKEY
    ld (hl),a ; set impossible value
    nokey or ...
    Dr BEEP Dr BEEP July 2007 Games
  • Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …

    ... block's size. The MC routine (in the DATA line) was ... BLOCK
    55 SCF ;CARRY SET means LOAD, CARRY RESET means ...
    Marcelo Marcelo August 2007 Sinclair Basic
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... /> [*]Decrement this number (which was set to +02). This should yield ... +01, and will set flags accordingly.
    [*]Write ... decrement is ZERO (Z flag set in F register), then ... existing, and therefore the P-RAMTOP (Physical RAM top) system variable ...
    Marcelo Marcelo August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... , if memory is faulty, this routine won't detect it - it ... DEC (HL) will fail to set the zero flag, because it ...
    Winston Winston August 2007 Sinclair Miscellaneous
  • A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…

    ... call $0556 I have to set the carry flag before setting ... registers if I call a routine from the spectrum rom, because ... time you call a ROM routine, you can't be sure ... you call the load-bytes routine.

    You're not ...
    DEATH DEATH August 2007 Sinclair Miscellaneous
  • A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…

    ... call $0556 I have to set the carry flag before setting ... yes, code within the CALL routine resets the CARRY Flag.
    routine from the spectrum rom, because ...
    rich_chandler rich_chandler August 2007 Sinclair Miscellaneous
  • A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…

    ... Count. When I write a routine that does something with a ... cheat sheets for the instruction set there, which are handy when ...
    Winston Winston August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... than the actual ROM routine. I'm sure the ... 0xFF instead. The Spectrum routine as it stands does ... the chips that they will set and reset correctly).
    ... pass every bit being set/reset plus inversion tests, ... fine in a test routine, but bits are found ...
    Winston Winston August 2007 Sinclair Miscellaneous
  • Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…

    ... 'll pass every bit being set/reset plus inversion tests, and ... just fine in a test routine, but bits are found to ...
    Laser Laser August 2007 Sinclair Miscellaneous
  • Games that CANNOT be completed if you cheat?Was just letting my mind wander this evening (oo-er!) and was thinking what games CANNOT be completed IF you cheat? All I could think of were the Mo…

    ... 33885,7) disables the swordfish-routine on "The Final Barrier", though ...

    [b][i]Jet Set Willy[/i][/b]: POKE 35123 ...
    andrewbroad andrewbroad August 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…

    ... d_PrintDoubleW()[/b]. The pixel scroll routine requirement has changed (the ... dots
    // bit 5 = set plot to player colour
    }

    // bit 5 = set plot to player colour
    // bit 5 = set plot to player colour
    Alcoholics Anonymous Alcoholics Anonymous September 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…

    ... .

    The 'flyback' interrupt routine sets the flag and I ... for the flag to be set I sometimes lock myself into ... exits when the flag is set. This means that the time ... plus/minus flag is automatically set
    ; no further instructions are ...
    frobush frobush September 2007 Games
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... if my little 128k Sound routine will complile.
    ([url]http ... a full 64-column character set to the binary. Redoing the ... about only attaching that character set when absolutely necessary.

    routine. z88dk has an [URL=" ...
    Alcoholics Anonymous Alcoholics Anonymous September 2007 Development
  • Whats Gone Wrong - Pixels Everywhere!Changed one small piece of code, that doesnt do anything to the screen and the following has happened: [img]http://www.officetrack.com/download/wos/…

    ... called with the A register set to FF, it is designed ... will relook at the scroll routine, which doesnt use any buffers ...
    carlinski carlinski September 2007 Development
  • Getting Lifeguard to workI'm struggling with this Muliface utility to find infinite lives cheats. I can get the program to load up, and when I load a game and press the red b…

    ... at $95AC is the routine that changes the lives ... 95FE to set a breakpoint there (because this routine would most ... As this is the routine that changes the lives I ... 2F -- looks like a routine to decrease the lives and ... I was in the routine that drew the status ...
    StuBruise StuBruise September 2007 Sinclair Miscellaneous
  • 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…

    ... returns with the carry flag set. So by adding this " ... /> [/code]

    "disp" gets set to the address in the ... ].

    We then set the number of pixels yet ... /> void scroll_isr(void) // an interrupt routine called every 1/50s
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... that in the printing routine, 'p' is set to the "wrong" player ...
    Digital Prawn Digital Prawn October 2007 Development
  • Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…

    ... COPTRULES2 is the extended rule set for indexing within arrays and ... COPTRULES1 is the standard rule set (been hanging around for ages ... br /> # The ones here, set verbose flag (echo commands) and ... /> LIB SPPFill ; use library routine
    LIB liner ; use ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…

    ... the "spare" locations all set to $FF. I'm ... pascal environment parameters should be set as follows:-
    ... even has a full set of instructions in the ... the standard ROM SAVE routine, rather than turbo data ... this small machine code routine. It calls the 128K ...
    Digital Prawn Digital Prawn November 2007 Games
<1…21222324252627…34>

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