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<1234567…34>
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... bug or not. The command "RST 38H" is the problem. Simply put ... decimal value?

    If 38H does = 38 decimal then it ... 38, which has the opcode RST 38H, thus making it jump back ...
    MadDoc MadDoc September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... degree, yet cannot differentiate between 38H and 38, cannot understand binary ... the web.

    If 38H = 38 (which I assume it ... ROM image, there is another RST 38H command - thus setting up a ...
    MadDoc MadDoc September 2004 Development
  • He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…

    ... the interrupt should trigger a RST 38h, and not one of the ...
    Where's that AY chip gone... Where's that AY chip gone... August 2007 Chit chat
  • He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…

    ... currently just always does a RST 38h, because that's what RS32 ...
    Where's that AY chip gone... Where's that AY chip gone... August 2007 Chit chat
  • He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…

    ... the interrupt should trigger a RST 38h, and not one of the ...
    Winston Winston September 2007 Chit chat
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... ), which is the opcode of RST 38h

    This will push ... ) and will go to address 38h, which belongs to ROM.
    RST 38h again.
    Which will push ...
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • Pretty CrashesTo make a 48K spectrum crash spectacularly and beautifully enter the following into basic. Also works on a 128k in 48k mode though not quite as prett…

    ... often be 0xFF (which is RST 38h), so IM 0 will [i ...
    ccowley ccowley September 2010 Sinclair Basic
  • SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…

    ...
    ld (atflg),a
    rst 08h
    defb $0a
    pop af
    rst 38h
    reti

    org ...
    chev chev April 2011 Sinclair Basic
  • Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…

    ... handler, for example, issuing a RST 38h for IM 1 interrupts)
    mcleod_ideafix mcleod_ideafix June 2012 Development
  • Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…

    ... handler, for example, issuing a RST 38h for IM 1 interrupts)
    takapa takapa June 2012 Development
  • 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't ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Shrinky challengeInspired by this contest on c64: http://nurpax.github.io/posts/2019-08-18-dirty-tricks-6502-programmers-use.html Make the smallest possible .tap t…

    ... C,(HL)
    000E FF RST 38h
    000F 00 NOP
    FF51 FF RST 38h
    FF52 E4 5C A6 ...
    dbolli dbolli August 2019 Development
  • RST 16 with TASMCan any body tell me what is wong when I assemble this test code with TASM : ;print a long string "help me" start .org 32000 ld a,2 call 5633…

    ... ,(de)
    inc de
    RST 16
    jr loop
    RST 16

    Is it ...
    Steve(spt) Steve(spt) April 2004 Development
  • question about RST 10hhow do you set the position of the text when using 'RST 10h' to print to screen?

    how do you set the position of the text when using 'RST 10h' to print to screen?
    madvanman madvanman May 2007 Development
  • +3 BASIC and RST 8I've been working on adding commands to the BASIC interpreter, in a similar style to how Interface 1 does it (catch the RST 8 error trap). This works…

    ... 1 does it (catch the RST 8 error trap). This works ... 48k, a 128k (in either RST 0 or in the 128 ... under 48K BASIC or in RST 0 mode.

    But ...
    Winston Winston February 2009 Development
  • Using RST 16 and udg flickerHi there! I'm using UDGs and RST 16 to make a simple canyon bomber game. I've got the game mechanics working ( finally ) but now I'd like to make …

    ... /> I'm using UDGs and RST 16 to make a simple ...
    Atari_Jetman Atari_Jetman October 2012 Development
  • 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 ...
    tstih tstih May 2014 Development
  • Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…

    ... RST 0x0010 jumps to 0x10. Besides existing RST 0x00, RST 0x08, RST 0x10, RST 0x18, RST ... 0x20, RST 0x28, RST 0x30, and RST 0x38 ...
    0x002B RST 0x38
    0x002C RST 0x38
    0x002D RST 0x38
    tstih tstih July 2014 Development
  • Patching RST routines?Hi all, I am quite unexperienced regarding the Speccy and today I made another attempt to make a concept for a SymbOS port to this machine. There is…

    ... at #0000-#0040 for the RST commands?

    Is there ...
    Prodatron Prodatron December 2014 Development
  • I need ASM for random numberI need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23. Any ideas on how to code …

    Hi,

    You could use this one if someone founds out why it returns with a Integer Out of Range error. :(

    [code]

    ORG 32768
    LD HL, (23672)
    LD (_RANDOM_SEED), HL ; Initialize the seed for random ...
    horace horace September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    I think my RST command works OK - its just the address in memory that I jump to is wrong. All I need to know is what is the value of 38H in decimal (and RST 00h, 08h, 10h, 18h, 20h, 28h, 30h).

    :)
    MadDoc MadDoc September 2004 Development
  • Need a pointer to using the spectrum calculator from MCHi all, Can anyone point me to a good resource on using the spectrum calculator stack from machine code? I need to work out the number of seconds f…

    ... /> CALL STACK_A ; stack it
    RST 28h ; call the calculator
    DEFB 38h ;end - so we do RESULT ... ,1
    CALL STACK_A
    RST 28H
    DEFB 0FH ;DO ... INTEGER OF RESULT
    DEFB 38H
    CALL FPPRINT
    ret ...
    dickydodds dickydodds February 2009 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 ... ,y x*y
    db 38h ; 38 end_calc
    ;
    call ...
    g0blinish g0blinish December 2012 Development
  • 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 ... , Y-Y0,X
    defb 38h ; end-calc

    ... Y0, X, X0

    rst 28h ; calculator start
    defb ... -X0, Y-Y0
    defb 38h ; end-calc

    ...
    Timmy Timmy August 2016 Sinclair Basic
  • Hook CodesIf you've dug into the Interface 1 this should be an easy question. I last had 'em circa 1990 while I can remember the things they did Start Motor C…

    ... a program

    Normally RST 8 handles exceptions eg
    RST 08
    DB 01 ;;produces " ... 2 Variable not found"
    RST 08
    DB 1A ;;produces ... error" (maybe, not certain)
    RST 08
    DB 1B ;;Starts ...
    john john February 2001 Sinclair Miscellaneous
  • ZX PC Interface : The manual, schematics and more info... ZX &lt;-> PC Interface ------------------- Contents 1) The ZX &lt;-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Install…

    ... the ZX ROM.

    RST 8 is also altered, but ... from 1997. You can make RST 8 to call to your ...
    Dr BEEP Dr BEEP December 2002 Sinclair Miscellaneous
  • ZX PC InterfaceZX &lt;-> PC Interface Contents 1) The ZX &lt;-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Installation 2.1) The softwa…

    ... saving to tape.

    RST 8 is also changed, but ... .
    You now can make RST 8 to call to your ...
    Dr BEEP Dr BEEP January 2003 Announcements
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... ), the processor simply executes an RST 38 instruction if an interrupt ... (0xff), coincidentally the opcode for RST 38, so the Z80 will ... executed; if there is a RST n on the data bus ...
    Philip Kendall Philip Kendall July 2004 Development
  • The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…

    ... ) ; Fetch byte for print
    rst 16 ; Printing table and screen ...
    Dr BEEP Dr BEEP September 2004 Development
<1234567…34>

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  • RST 16 with TASMCan any body tell me what is wong when I assemble this test code with TASM :<br /> <br /> ;print a long string "help me"<br /> start .org 32000<br…
  • http://zx.pk.ru RST#38 (Russian Spectrum Talks)[url="http://zx.pk.ru"]http://zx.pk.ru[/url] is a biggest Russian forum for Speccy (has 750 Registered Users &amp; 30 000 Messages). It's live discus…
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  • question about RST 10hhow do you set the position of the text when using 'RST 10h' to print to screen?
  • +3 BASIC and RST 8I've been working on adding commands to the BASIC interpreter, in a similar style to how Interface 1 does it (catch the RST 8 error trap). This works…
  • Using RST 16 and udg flickerHi there!<br /> <br /> I'm using UDGs and RST 16 to make a simple canyon bomber game. <br /> <br /> I've got the game mechanics working ( finally ) b…
  • RST hooks in OpenSE BASICHi,<br /> any possibility of OpenSE BASIC having RST vectors rewired to a small table in RAM containing jumps back to apropriate ROM locations? :grin…
  • Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…
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