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<1…16171819202122…34>
  • ROM POKE-able emulatorIs there an emulator available where you can POKE the ROM (and also altering it) while running? Thereby making the ROM work like RAM. Preferably a…

    ... a ZX Spectrum (when ROM was programmed or replaced with ... another ROM).

    The ... I am recoding the ROM so it can run ... needed an altered ROM to intercept a RST 8 as shortcut ... the setting of channels with RST #10 and this can ...
    Dr BEEP Dr BEEP June 2012 Emulators
  • ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…

    ... some syscall to call zx rom and he replied me, ... address of routine in zx rom.

    i ... br /> ld ($5c5d),hl
    rst $18
    dw $24fb ; ... in the 128 editor ROM is fully disassembled and ...
    ub880d ub880d July 2012 Announcements
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... "void", which means reading FFh (RST 38h). If address 0038h doesn ... be active, disabling the internal ROM, but if this happens, EPROM ... and RAM_CS are high. Internal ROM is therefore active. This explains ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…

    ... /> ld a,22 ;ROM 'at'
    rst 16 ;rom routine deals with contents ... 22 is row...
    rst 16 ;rom routine deals with contents of ... row is column
    rst 16 ;rom routine deals with contents of ... x 100
    call 6683 ;rom routine that prints the number ...
    R-Tape R-Tape August 2012 Development
  • PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…

    Using ROM go with something like..
    rst 16
    ld a, ... 7 ;white paper
    rst 16
    ld a, ... 16 ;ink control
    rst 16
    ld a, ... 1 ;blue ink
    rst 16
    [/CODE]
    ... functions that can be rst 16'd. If you ...
    R-Tape R-Tape August 2012 Development
  • PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…

    ... the print routine in the ROM?

    For instance I ...
    mcleod_ideafix mcleod_ideafix August 2012 Development
  • Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…

    ... ram pages switched instead ZX rom. Also Divide PLUS support true ... 16kB ram page instead zx rom
    ..... your allram software....
    RST 0 ;restart system

    velesoft velesoft October 2012 Development
  • Help needed...I am at my wits end with this pigs ear of a routine, can anyone simplify it and make it work as it should? Basically it should make the characters '…

    ... /> call 5633 ;tell ROM we're in the upper ... ;...is switched on
    rst 16
    call print_string ; ... ld a,(ycor)
    rst 16
    ld a,(xcor ... )
    rst 16
    ld de,(stringseed ... bytes
    call 8252 ;ROM print string
    ret< ...
    R-Tape R-Tape October 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 …

    ... /> 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
  • 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
  • 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
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... :
    0 for the 128K 'ROM 0'
    (i.e. the ... rather different to the 48K ROM)
    R for uninitialised RAM ... 5B80 NOP
    R 5B81 RST 38

    [/CODE ...
    zub zub February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... /> I had meant that the ROM is paged in after the ... addresses which in the Spectrum ROM contains RST #38 instructions ? I imagine ... of the Beta interface's ROM were delayed at all, in ...
    zub zub February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... ]I had meant that the ROM is paged in after the ... addresses which in the Spectrum ROM contains RST #38 instructions ? I imagine ... of the Beta interface's ROM were delayed at all, in ... some internal machine cycles when ROM is replaced.
    You may ...
    roko roko February 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
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... might have expected the 'DOS ROM' to contain the same ... first byte as the Spectrum ROM in this case, although ... ROM to 48 ROM), you get a RET in the RG ROM and RST ... $38 in the 48 ROM. RET is ... to the $0280 (48 ROM to RG ROM) RET (which is $F9 ...
    Jmk Jmk April 2013 Hardware
  • 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
<1…16171819202122…34>

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