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  • Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…

    Disentangling your code looked too much trouble, so I wrote a quicker BASIC version then an assembler version of that (although that's rather slow even so). It could be written to run more quickly by not using the FP calculator but I expect that it would ...
    Battle Bunny Battle Bunny November 2012 Development
  • Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…

    Here's a much quicker version; the BASIC now only takes 50 seconds, and the assembler is reduced from 318 secs to 17 secs. There's still scope for further improvements. The significant change is that it only executes the inner Y loop with valid plot points ...
    Battle Bunny Battle Bunny November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    RST $10 outputs to the current ... use. A copy of the ROM disassembly always comes in handy.
    Battle Bunny Battle Bunny November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... call $1601 ; ... and call the ROM routine to activate it
    rst $10 ; otherwise print control character ... business down immediately before the rst $10, with surrounding "push ... I've looked at the ROM disassembly but my brain starts ...
    snigfarp snigfarp November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ...
    [QUOTE=Battle Bunny;665943]RST $10 uses EXX to reference ... call $1601 ; ... and call the ROM routine to activate it
    rst $10 ; otherwise print control character ... ; load character into A
    rst $10 ; print it
    ...
    snigfarp snigfarp November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... you're not calling any ROM routines which use the E_LINE ... channel information area and then RST $10 would stop working ... which ...
    Battle Bunny Battle Bunny November 2012 Development
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... you're not calling any ROM routines which use the E_LINE ... /> Thanks for that. The only ROM routines I plan to use ... channel information area and then RST $10 would stop working ... which ...
    snigfarp snigfarp November 2012 Development
  • calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …

    ... put C on stack
    rst 28h
    db 34h ; ; 34 ... x*y
    db 38h ; 38 end_calc
    ;
    call 2DD5h ...
    g0blinish g0blinish December 2012 Development
  • calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …

    ... /> would be great to find ROM routine which prints FP from ... .

    2DE3 PRINT-FP RST 0028,FP-CALC Use the ...
    g0blinish g0blinish December 2012 Development
  • calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …

    [CODE] rst #28
    db 34h ; ; 34 ... ;
    DB #2E
    db #38
    CALL #2BF1[/CODE]
    g0blinish g0blinish January 2013 Development
  • ZX-Preview 2.2 publishedDear readers, yes, it's a big time of beta-testing and publishing, but I want to get my time free for my new project ZX-Assembler. Two days ago I r…

    ... ,($5800)
    OR $DD
    RST $20

    Nice work ... -do-list. Also, loading a ROM label file could be implemented ... which replaces all ROM calls by names of the ...
    clausjahn clausjahn January 2013 Emulators
  • +3e filebrowserHello everyone, Im writing a game/program loader for the +3e (with an IDE interface, but it can work with floppies too). The program lets you choose…

    ... CALL & RETADDR in ROM.1 might be different), will ... filename in WORKSP
    rst $30
    ld hl ... out (c),a ;switch to ROM.1
    ei
    ... out (c),a ;switch to ROM.3
    ei
    ...
    Battle Bunny Battle Bunny January 2013 Development
  • +3e filebrowserHello everyone, Im writing a game/program loader for the +3e (with an IDE interface, but it can work with floppies too). The program lets you choose…

    ... to use routines located in rom 1 as is very likely ... /> -it works on +3e ROM v1.38 (maybe in older versions too ...
    BCH BCH February 2013 Development
  • PlusD Mini: implementing the CPLDI am doing my first attempts on creating a CPLD to use as replacement for the PlusD's GAL (and other logic lateron). I use the Xilinx XC9500XL series…

    ... result of executing opcode 0xFF (RST 0x38 ) continuously. Which means you ... successfully paged out the Spectrum ROM, but not managed to page ...
    Winston Winston February 2013 Hardware
  • PlusD Mini: implementing the CPLDI am doing my first attempts on creating a CPLD to use as replacement for the PlusD's GAL (and other logic lateron). I use the Xilinx XC9500XL series…

    ... result of executing opcode 0xFF (RST 0x38 ) continuously. Which means you ... successfully paged out the Spectrum ROM, but not managed to page ... is some problem with the rom paging.
    Here's the ...
    bverstee bverstee February 2013 Hardware
  • PlusD Mini: implementing the CPLDI am doing my first attempts on creating a CPLD to use as replacement for the PlusD's GAL (and other logic lateron). I use the Xilinx XC9500XL series…

    ... getting asserted OK (the ZX ROM is clearly paged out, showing ... prevent the built-in ZX ROM from getting selected, which is ... is that while the ZX ROM is paged out, either no ... memory with each execution of RST 0x38.
    Winston Winston February 2013 Hardware
  • Setting up an IDE HDD on the +3e helpHello, Just installed a HDD in my +3e (ROM ver. 1.11). When turning on it takes a few seconds longer but then shows 2 IDE (available) as well as 1 fl…

    @Guess

    v1.38?

    The ROM on my 8bit IDE equipped spectrum is v1.36. Would the +3e ROM v1.38 be for the DivIDE ?
    Zetr0 Zetr0 March 2013 Hardware
  • Setting up an IDE HDD on the +3e helpHello, Just installed a HDD in my +3e (ROM ver. 1.11). When turning on it takes a few seconds longer but then shows 2 IDE (available) as well as 1 fl…

    ...

    v1.38?

    The ROM on my 8bit IDE ... .36. Would the +3e ROM v1.38 be for the DivIDE ?[/QUOTE ... most recent version is v1.38 from July 2009...

    ROM images updating.
    guesser guesser March 2013 Hardware
  • Setting up an IDE HDD on the +3e helpHello, Just installed a HDD in my +3e (ROM ver. 1.11). When turning on it takes a few seconds longer but then shows 2 IDE (available) as well as 1 fl…

    ... . The current version is v1.38

    The simplified FORMAT ... ]

    With 1.1 ROM, the FORMAT TO command has ... /> FORMAT TO 0,658,16,38,15

    Unit 0 ... cylinders
    16 heads
    38 sectors
    15 partitions
    Jose_Leandro Jose_Leandro March 2013 Hardware
  • A quick newbish questionI'm reading through 'mastering machine code on your spectrum',as kindly posted by Mr bert on this forum. Correct me if I'm wrong from what i read,bu…

    ... , but when you use the ROM printing the PRINT USR will ... printing to the screen using ROM routines (mostly at address 16 ... /> [CODE]LD A,99
    RST 16
    RET[/CODE]
    TK90XFan TK90XFan March 2013 Development
  • 16k programmingHi all, If I want to code something for a 16k (or any spectrum) my understanding was that if I CLEAR below 24064 and put all the code above it up to…

    ... . My demo used RST 16 but no other ROM calls, and my ... updated version will have no ROM calls at all.


    RST 16 will be fine/ just ... always follow it e.g. RST 16 / DEFB 'A' / ...more code ...
    BloodBaz BloodBaz April 2013 Development
  • Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…

    ... API name on stack, then RST 0x10 */
    u->exit ... RAM using IM2 and in ROM.

    There are also ...
    tstih tstih May 2013 Development
  • DIVIDE PLUS - new memory mode DIVIDE128Divide PLUS contain 512kB sram + 512kB flash eprom. Memory paging in this device is enable on two different ports : 1) port #E3 is compatible with o…

    ... to DIVIDE128 mode with mapram (rom emulation):

    [ ... bytes
    LDIR ;copy rom image with divide system from ... to all ram pages for rom emulation(mapram pages)
    ... 1(memory ROW1)
    RST 0 ;restart system from first ...
    velesoft velesoft June 2013 Hardware
  • Colour whilst PLOTing in MCI am using the ROM PLOT routine at $22E5, how do I control the colour of the results, so I can preferably use INK 8, it seems to have a mind of its o…

    ... ;708459]I am using the ROM PLOT routine at $22E5, how ... and PAPER controlcode with the RST #10 printroutine.

    16 ... />
    LD A,16
    RST #10
    LD A,6 ...
    RST 16

    will set ...
    Dr BEEP Dr BEEP June 2013 Development
  • FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…

    ... 's a call to the ROM "out of screen" error report ... />
    jr c, in_screen
    rst 8
    defb 4
    chev chev July 2013 Brand new software
<1…21222324252627…34>

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