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  • FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…

    ... dependent on the IF1 shadow ROM, it does assume that ... not polling in the shadow ROM.

    I ... byte command). RST nn and HALT. While RST would work under ... need to be in ROM, HALT would prevent debugging ... ) as there is for ROM, without you modifying the ...
    zub zub March 2014 Development
  • TXT2EMU enhancementI was looking at the encodings supported by BAS2TAP for entering graphics, print controls, etc. as plain text. Basically, there's only one needed, be…

    ... via a RST 8 first so that an alternative ROM will be ...
    Battle Bunny Battle Bunny March 2014 Sinclair Basic
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ...
    selects one of two ROM images to use. Otherwise fit ... - Reset switch. Pin 1 is /RST, pin 2 is 0V/ground ...
    1024MAK 1024MAK April 2014 Hardware
  • RST hooks in OpenSE BASICHi, any possibility of OpenSE BASIC having RST vectors rewired to a small table in RAM containing jumps back to apropriate ROM locations? :grin: It i…

    ... possibility of OpenSE BASIC having RST vectors rewired to a small ... containing jumps back to apropriate ROM locations? :grin: It is an ... vectors that are located in ROM to user mode applications. (hint ... an alternative...is there any ROM left for a small monitor ...
    chev chev May 2014 Development
  • Beautiful codeSome people see beauty or something sublime in maths formulas and equations, can anyone suggest examples of beautiful or sublime programming?

    ... isn't that basically a RST 28h calculator call utilizing stack ... /> BTW, the Beta Disk -- the ROM bank switching using address 15616 ...
    Jimmy Falcon Jimmy Falcon May 2014 Development
  • Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.

    ... 'd have to read into ROM disassembly to get an idea ... learn assembly program starting from ROM disassembly isn't an easy ... out about how ROM printing routine (RST 16 or RST $10) works, due ...
    TK90XFan TK90XFan July 2014 Development
  • New Game(s): Sir Ababol 2 and Sir Ababol DXHere is our own Christmas Present from Mojonia! We weren't going to release these games (at least, by the moment) but we decided just yesterday to fi…

    ... only 144 bytes (it uses ROM print routines just to be ... /> ld a,22 ;rom 'print at'
    rst 16
    ld a ... ,0 ;y
    rst 16
    ld a,0 ... ;x
    rst 16
    plp ld a ... string
    ret z
    rst 16 ;print ASCII until we ...
    R-Tape R-Tape January 2015 Brand new software
  • Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…

    ... .
    * Breakpoint on entering/exiting ROM
    * Breakpoint on NMI/INT ... Z80 is about to execute RST 08h to display the error ...
    mcleod_ideafix mcleod_ideafix January 2015 Emulators
  • Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…

    ... .
    * Breakpoint on entering/exiting ROM
    * Breakpoint on NMI/INT ... Z80 is about to execute RST 08h to display the error ...
    chernandezba chernandezba February 2015 Emulators
  • Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…

    Here's something which I converted from a BASIC routine in ZX Computing. The smallint conversion can be discarded if row,col are not derived from some calculation which might render a floating point result. (I can't get the code block to print fixed width, ...
    Battle Bunny Battle Bunny June 2015 Development
  • Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…

    ... rather than always using the ROM set.
    * Address the display ... using RST $10.
    * Simplify the SmallINT check, as the ROM FP_TO_A ...
    Battle Bunny Battle Bunny June 2015 Development
  • Falling Blocks - new game from z80 assembly beginner<p>I started learning z80 assembly earlier this year, mostly from reading Jonathan Cauldwell's "How to write ZX Spectrum Games" and from reading arti…

    ... are also available in the ROM.
    I.e. ATTR-address ... call and then only use RST 16.
    (Or open the ...
    Dr BEEP Dr BEEP June 2015 Development
  • z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…

    ...
    zx specrum rom subroutine, refer to ROM disassembly
    THE ... want an asterisk here.
    rst 16 ; display it.
    ... xcoord) ; vertical position.
    rst 16 ; print it.
    ... ycoord) ; y coordinate.
    rst 16 ; print it.
    ...
    Bedazzle Bedazzle September 2015 Development
  • z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…

    ... . passed to PRINT_OUT in the ROM) as the row & column ... -Xacross,24-Ydown).

    'rst' is a quick way of ... at the start of the ROM, so 'rst 16' does the same ...
    Battle Bunny Battle Bunny September 2015 Development
  • z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…

    ... control code for AT.
    rst 16 ; print it.
    ... a,(ycoord) ; vertical position.
    rst 16 ; print it.
    ld ... a,(xcoord) ; y coordinate.
    rst 16 ; print it.
    ret ... />
    "rst 16" is equivalent to "call 16". The ROM supplies a ...
    Alcoholics Anonymous Alcoholics Anonymous September 2015 Development
  • Rom routine for pixel addressDear all, Having my bi-annual 'lets try machine code' project again and have come up with a problem with the pixel address rom routine at 8874. …

    You don't need the RST $10.
    HL contains the ... .
    As you state, The RST $10 is probably not overwriting ... /> Have a look at the ROM PLOT routine at $22DC on ... p116 of The Complete Spectrum ROM Disassembly for more info.
    dbolli dbolli September 2015 Development
  • Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…

    ... , I peeked the IF1bis shadow rom source, and it seems it ... the 128rom0 disassembly, the rom bank switching routine (rst 28h) is hookable ... ‘48k BASIC’, from its internal ROM while the joystick and mouse ...
    zPasi zPasi September 2015 Hardware
  • Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…

    ... , I peeked the IF1bis shadow rom source, and it seems it ... the 128rom0 disassembly, the rom bank switching routine (rst 28h) is hookable ...
    Dan Antohi Dan Antohi September 2015 Hardware
  • What is the "SPECTRUM" keyword on a 128K?The 128K replaced UDG characters T and U with new commands; PLAY and SPECTRUM (or possibly the other way around.) The manual ([url="http://www.wor…

    ... spare 0FFh byte in the ROM to make the checksum come ... the error number for the RST 8 issued by the SPECTRUM ... is at offset 13h in ROM 3. Change it back to ...
    John Elliott John Elliott October 2015 Sinclair Basic
  • What is the "SPECTRUM" keyword on a 128K?The 128K replaced UDG characters T and U with new commands; PLAY and SPECTRUM (or possibly the other way around.) The manual ([url="http://www.wor…

    ... spare 0FFh byte in the ROM to make the checksum come ... the error number for the RST 8 issued by the SPECTRUM ... is at offset 13h in ROM 3. Change it back to ...
    MatGubbins MatGubbins October 2015 Sinclair Basic
  • Basic BASIC help needed RNDHi all, I have recently re-discovered an old program I wrote in the early 90s which would do generate random lottery numbers. I know little now, an…

    ... (unsurprisingly, as the ROM $25F8 S_RND function didn ... numbers, but the ROM was interfering with M0 ... /> RNDFUN: di
    rst $28 ;FP_CALC
    defb ... 'VAL'

    rst $28 ;FP_CALC
    defb ...
    Battle Bunny Battle Bunny May 2016 Sinclair Basic
  • TommyGun's getting a Debuggerhttp://youtu.be/B_kZVRvYV98 I have always wanted to debug the programs I write in TommyGun using TommyGun instead of the debuggers in emulators. …

    ... this.
    I hi-jacked rst 16 (rom print - i never use ...
    Kiwi Kiwi July 2016 Development
  • Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…

    ... a single line. (ROM)
    0x5B0A RST 18 ; GET-CHAR (ROM)
    0x5B0B ... to the machine stack. (ROM)
    0x5B55 RST 18 ; GET-CHAR, Before ... /> REPORT-0: 0x5B7E RST 8 ; ERROR-1 (ROM)
    0x5B7F DEFB +FF ...
    lfaria lfaria August 2016 MIA/STP/SDP
  • Line DemoI was looking in the source code of another game (that Akalabeth game), with lots of line drawings. The difference was that they don't use the PL…

    ... STACKA equ $2d28

    rst 28h ; calculator start
    defb ... -Y0, X, X0

    rst 28h ; calculator start
    defb ... /> exx

    ; terug naar ROM
    ld hl, (23730)
    Timmy Timmy August 2016 Sinclair Basic
  • Optimized (in size) Z80 simulatorI am evaluating Z80 simulators to try to create a tool to analyse z80 programs. I'd like to start with a simple register coverage tool and t-state cy…

    ... particular the way it uses RST instructions followed by a 2 ... bits are used to control ROM states (or are a pointer ...
    AndyC AndyC September 2016 Development
  • So it occurred to me; "Why bother with going into 48K BASIC when you can just....wrap the machine code calls inside a 'RST #28;DEFW addr:RET'?" Of course, you DO need a small M/C routine to do that, and ta-daaa, here it is: [cod…

    ... "goes into 48 mode", the RST #28 DOES provide a sort ... BASICs to enter the 48K ROM and execute code there, is ... then return to the 128K ROM. By using this mechanism, the ... relies on, to the new ROM, but could concentrate on writing ...
    The_Bert The_Bert October 2016 Sinclair Basic
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    ... ...to somehow rewire one RST jump in ROM to our debugger, recognize ... by ZX ROM at some point (executing a RST call to ... would then show assembly (showing ROM assembly).

    ... the breakpoint. The breakpoint (RST command) would cause passing control ...
    tstih tstih November 2016 Development
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    ... ROM. In this case we call the original code.

    RST ... /> jp 0x335b ; calculate in ROM
    .db 0xff,0xff,0xff ... Find the place in ROM for RST call decoding logic and ... u]

    Well…Spectrum ROM Dissasembly says:

    ...
    tstih tstih November 2016 Development
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    Here's the (untested) rst part and the bootstrapping in ... 19 bytes.

    [u]RST code[/u]
    [code]
    jp 0x335b ; calculate in ROM
    [/code]

    [u ... ) pop hl ; else called from ROM, restore regs and return
    tstih tstih November 2016 Development
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