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Search Again :: Adv Search 515 results in 0.001s
<1234567…18>
  • "Decoding Z80 Opcodes" updateHello, To whom it may concern: I've made an update to my document, "Decoding Z80 Opcodes" at [URL="http://www.z80.info/decoding.htm"]http://www.z80.…

    Hello,

    To whom it may concern: I've made an update to my document, "Decoding Z80 Opcodes" at [URL="http://www.z80.info/decoding.htm"]http://www.z80.info/decoding.htm[/URL]. Thanks to BlueChip for his suggestions and corrections.
    GOC GOC August 2006 Announcements
  • Undocumented DD opcodesHi, I'm emulating the DD-prefixed opcodes at the moment. What happens to an undocumented DD opcode - Phil's test suite doesn't test them. For insta…

    ... 'm emulating the DD-prefixed opcodes at the moment.

    MadDoc MadDoc July 2008 Emulators
  • PSI ChessHi, Anybody out there remember the game "PSI Chess" by The Edge? Well, there seems to be no problem finding a snapshot ot tape image for this game …

    ... is written that uses obscure opcodes or something which makes it ...
    Ed Ed February 2002 Games
  • SPIN v0.2c available now[Cut n Paste from the CSS post] Okay, I'm off to sunny(?) Scarborough for a week, so Woody and I thought it best that we give you something to d…

    ... , concerning certain IX+D
    opcodes
    Fixed the Archive Info ...
    Dunny Dunny July 2002 Emulators
  • Z80 AssemblerSome of you may know that I'm working on a Z80 assembler. I thought I'd start a thread so I can see what people think and what they might want to see…

    ... new operations by combinations of opcodes strung together and multiply defined ...
    cyborg cyborg February 2003 Sinclair Miscellaneous
  • simple z80 rom for test my emulatorHi there! Does anyone here have a very simple rom(in Z80 format) for testing my emulator. I need a very simple one that implements few opcodes and po…

    Hi there!
    Does anyone here have a very simple rom(in Z80 format) for testing my emulator. I need a very simple one that implements few opcodes and possible show a simple graphics.
    luisoft luisoft April 2004 Emulators
  • Z80 register decoding document error?Hi, I've been working on a disassembler using the following document written by Cristian Dinu (aka GOC?). [url="http://www.z80.info/decoding.htm…

    ... the section titled "DD-Prefixed OpCodes" it seems the example is ...
    vreddy vreddy December 2004 Development
  • ANNOUNCE: BASin Release 12 ready for downloadWell, after a rather large break, BASin's latest incarnation is ready for public use. Probably. BASin is a Sinclair Spectrum development environme…

    ...
    All undocumented flags and opcodes emulated.
    Very, very fast ...
    Dunny Dunny June 2005 Emulators
  • ANNOUNCE: BASin Release 12 ready for downloadWell, after a rather large break, BASin's latest incarnation is ready for public use. Probably. BASin is a Sinclair Spectrum development environme…

    ...
    All undocumented flags and opcodes emulated.
    Very, very fast ...
    Dunny Dunny June 2005 Sinclair Basic
  • SjASMPlus cross compiler of Z80 assembly languageHi! I want to present you cross-compiler of Z80 assembly language: [B]SjASMPlus[/B]. [SIZE="4"]Features:[/SIZE] [LIST] [*]Z80/R800 documented and un…

    ... /> [*]Z80/R800 documented and undocumented opcodes support
    [*][B]3-pass ...
    aprisobal aprisobal September 2006 Development
  • Question For The Emulator AuthorsWhy do $ED $44, $ED $4C, $ED $54, $ED $5C, $ED $64, $ED $6C, $ED $74, $ED $7C all disassemble to opcode NEG and $ED $45, $ED $55, $ED $5D, $ED $65, …

    ... , $ED $7D all disassemble to opcodes RETN alternately?

    Surely ...
    rich_chandler rich_chandler April 2007 Emulators
  • 8-bit or 16-bit registers?I'm playing around with writing a Speccy emulator for mobile Java at the moment. I did a quick and dirty port of Qaop, which does run but at less tha…

    ... (with a random selection of opcodes) show that I can get ...
    bigredswitch bigredswitch June 2007 Emulators
  • Z80 ParserAs you can see from my signature I'm doing a new Z80 assembler partly as a coding exercise and partly as there's some extra features I need. I'm hal…

    ... 'm halfway through defining the opcodes as an LL(1) parser ...
    kcartlidge kcartlidge January 2008 Development
  • ANNOUNCE: BASin r14 is up. New SCREEN$ paintbox included.Hi all, Well, I can't sit on this any longer - so I've released it. Let's all get a good testing session going, eh? You can get the new BASin [url=…

    ... the INC/DEC IX/IY opcodes. (Woody)
    Fixed - Appending a ...
    Dunny Dunny February 2008 Emulators
  • The R RegisterI've found some documentation regarding the R register (in that it is updated every M cycle except for a certain number of opcodes in which it is upd…

    ... for a certain number of opcodes in which it is updated ...
    MadDoc MadDoc June 2008 Emulators
  • InterruptsI need help emulating interrupts. My z80 core currently emulates all un-prefixed opcodes and the CB opcodes. I thought I would start on emulating co…

    ... emulates all un-prefixed opcodes and the CB opcodes. I thought I ...
    MadDoc MadDoc July 2008 Emulators
  • BASin r14d - Final bugfix for the r14 seriesOk, there's not a great deal to "show" here, as most of the work has been going on "under the hood" so to speak. And there's been a [i]lot[/i] of wor…

    ... - typically after one frame of opcodes, rather than 5 seconds of ...
    Dunny Dunny December 2008 Emulators
  • Tips on (dis-)assembling Z80 instructionsedit: Naturally I managed to post this in the wrong forum. I'd much appreciate it if any moderator would move it to the development section. For the…

    ... for parsing and decoding assembly opcodes. Note that I'm interested ...
    doynax doynax June 2009 Development
  • A tidy loader for minigamesThe minigame competition doesn't permit the use of separate loaders like [code]10 LOAD "": RAND USR 32768[/code] The loader must be included in the b…

    The minigame competition doesn't permit the use of separate loaders like
    [code]10 LOAD "": RAND USR 32768[/code]
    The loader must be included in the byte count.

    In an attempt to save as many bytes as possible, people have written ...
    ajmoss ajmoss June 2010 Development
  • Automatic opcode to machine codeHi everyone, Would people use a program that you enter opcodes and it automatically converts them to machine code and saves them to a file. So if yo…

    ... a program that you enter opcodes and it automatically converts them ...
    Robin Robin September 2010 Development
  • Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …

    ... any websites guides for what opcodes do in a z80
    ASH-II ASH-II October 2010 Sinclair Miscellaneous
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... give full list of instructions/opcodes etc., but they say nothing ...
    PeterP PeterP April 2011 Emulators
  • Opcode QuestionsHi all, I am an experienced LabVIEW progammer and also have fond memories of the spectrum. Thus I started to think about writing my own emulator an…

    ... to write the non-prefixed opcodes by specifying each state (OP ... to finish of the prefixed opcodes although I may be back ...
    labVIEW labVIEW September 2011 Emulators
  • AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…

    ... push af
    ld hl,OPCODES
    add hl,bc
    ldi ;enter command opcodes
    ldi
    rst ... )
    OPERATE:defw $0000 ;opcodes go here
    call STAKA ...
    Battle Bunny Battle Bunny October 2011 Sinclair Basic
  • Invalid combination of operands and opcodesIt says the error in the title, why is this?? [CODE] ORG 0000 LD HL, 63000 ;LOAD HL WITH STACK LOCATION LD SP, HL ;SET STACK POINTER TO HL LD A, …

    It says the error in the title, why is this??

    [CODE]
    ORG 0000

    LD HL, 63000 ;LOAD HL WITH STACK LOCATION
    LD SP, HL ;SET STACK POINTER TO HL
    LD A, 13 ;LOAD A WITH DISPLAY ON/NO BLINK, NO UNDERLINE
    OUT (3), ...
    Robin Robin December 2011 Sinclair Miscellaneous
  • SpecBAS 0.730 Now available!Well, I felt I should release SpecBAS as it is right now - my new son has been born (this one survived! \o/ ) and when he comes home I'll have very l…

    ... [,statement] command, which lists internal "opcodes" that specbas converts your code ...
    Dunny Dunny February 2012 Sinclair Miscellaneous
  • Quick OpCode Q...Leet emulat0r makerz.... I've seen two versions for this set of OpCodes, obviously they are undocumented.... FDCB d 40 BIT 0,(IY+d) (From Seans z80…

    ... versions for this set of OpCodes, obviously they are undocumented....
    Korinel Korinel February 2012 Emulators
  • extension to Z80 opcodes spreadsheetI've set up an extra Excel spreadsheet which references Einar's v.helpful Z80TABLE spreadsheet and allows a list of Z80 assembler commands to be type…

    I've set up an extra Excel spreadsheet which references Einar's v.helpful Z80TABLE spreadsheet and allows a list of Z80 assembler commands to be typed in and their timings added up. The [url=http://www.users.globalnet.co.uk/~jg27paw4/pourri/z80times.zip] ...
    Battle Bunny Battle Bunny March 2012 Development
<1234567…18>

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Related Threads

  • "Decoding Z80 Opcodes" updateHello,<br /> <br /> To whom it may concern: I've made an update to my document, "Decoding Z80 Opcodes" at [URL="http://www.z80.info/decoding.htm"]htt…
  • Undocumented DD opcodesHi,<br /> <br /> I'm emulating the DD-prefixed opcodes at the moment.<br /> <br /> What happens to an undocumented DD opcode - Phil's test suite does…
  • Invalid combination of operands and opcodesIt says the error in the title, why is this??<br /> <br /> [CODE]<br /> ORG 0000<br /> <br /> LD HL, 63000 ;LOAD HL WITH STACK LOCATION<br /> LD SP,…
  • extension to Z80 opcodes spreadsheetI've set up an extra Excel spreadsheet which references Einar's v.helpful Z80TABLE spreadsheet and allows a list of Z80 assembler commands to be type…
  • "Decoding z80 Opcodes" (http://www.z80.info/decoding.htm#intro) - Incorrect HALT Opcode?Apologies if this is a dupe but I searched within the forums and couldn't find anything.<br /> <br /> I've been working on a z80 emulator (for acad…
  • im having problems with zx spin. im getting invalid combination of opcodes and operands errorim trying to assemble this program:<br /> <br /> [code]org 40000<br /> <br /> ld a,0<br /> call 8859<br /> ld (iy+83),7<br /> ld a,2<br /> ca…

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