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<1234567…34>
  • DRAW x,y,a Algorithm - how does the ROM do it?Hi all, Getting on with SpecOS, and one of the things I would love to do is to preserve the original ROM's behaviour when drawing Arcs. This is don…

    ... to do is to preserve the original ROM's behaviour when drawing ... /> I've been reading the Complete ROM disassembly, where they provide an ... Pascal!) implementation of the Arc drawing algorithm implemented by the ROM. Just be ...
    Dunny Dunny August 2010 Sinclair Basic
  • using the ROM's FP calculatorIs it possible to use the ROM's FP calculator to evaluate any FP expression in a single sequence of commands without breaking out to stack some other…

    Is it possible to use the ROM's FP calculator to evaluate ... stack some other element of the expression? I feel that it ...
    Battle Bunny Battle Bunny March 2012 Development
  • THE ROM CHIPSDoes anyone know which are the ROM chips in ZX Spectrum 128K +2?

    Does anyone know which are the ROM chips in ZX Spectrum 128K +2?
    George George August 2012 Hardware
  • [B]THE ROM CHIPS[/B]Could anyone see and tell me which the exact numbers and letters printed on the rom chips in Spectrum +2 are?

    Could anyone see and tell me which the exact numbers and letters printed on the rom chips in Spectrum +2 are?
    George George December 2012 Hardware
  • "Hacking the XBox" ebook released -The commercially available book [B]Hacking the XBox[/B], by Andrew 'bunnie" Huang has been released free for download. bunnie was the bloke who broke…

    ... book [B]Hacking the XBox[/B], by Andrew ' ... the bloke who broke the protection on the original XBox (not the ... XBox 360) and whilst neither the ... subject matter itself, nor the level of ...
    ewgf ewgf March 2013 Chit chat
  • Games that checksum the ROMHello, is there a list of games that checksum the ROM and won't run (or maybe exhibit a different behaviour) unless it is the original 48k one? Searc…

    Hello, is there a list of games that checksum the ROM and won't run (or maybe exhibit a different behaviour) unless it is the original 48k one? Searched the forum but only found reference to the fact they exist and may be quite many.

    /Pedro
    pmsr pmsr October 2013 Sinclair Miscellaneous
  • Mastering Machine Code on your ZX Spectrum by Toni Baker - Chapter 17 Disassembling the ROMHi All, As promised I have posted the source code for the disassembler from Chapter 17 of Mastering Machine Code on your ZX Spectrum by Toni Baker…

    ... I have posted the source code for the disassembler from Chapter ... -toni-baker-chapter-17-disassembling-the-rom/"]here[/url].

    ... S. (codemonkey) for providing the image files from a hard ... were invaluable for error checking the OCRed PDF version and ...
    dbolli dbolli March 2016 Development
  • Recommend games that don't need the ROM ?I'm looking for a few games that: * Are freely available as .sna files * Do not need the ROM at all * Have motion on screen after snapshot resta…

    ... files
    * Do not need the ROM at all
    * Have motion ...
    Mr X Mr X October 2016 Games
  • Disabling the ROM without removing the whole thingHi! I've got my hands on a non-working issue 6a. I suspect the ROM may be bad, but other things may be faulty as well. I've read that in an otherwis…

    ... working issue 6a. I suspect the ROM may be bad, but ... an otherwise working speccy removing the ROM gives a very specific screen ... to narrow down the problem to the ROM.

    But the ROM (a NEC ... reluctant to risking damage to the board. These are 28 ...
    Mikelone Mikelone April 2017 Hardware
  • Precisely what is the ROM licencing situation?Freeware use, that is. Are the Speccy ROMs allowed to be used in any utility related to Spectrum emulation, or just in actual emulators? Is it …

    ... , that is.

    Are the Speccy ROMs allowed to be ... the ROM (I'm thinking specifically of the character set), or does the entire ROM ...
    robert@fm robert@fm October 2017 Emulators
  • Hacking the ZX Spectrum 48K ROMHi Guys, I have modded my Speccy with a dual boot ROM loading on first bank the original ZX kernel and on the second bank an enhanced version. I h…

    ... a dual boot ROM loading on first bank the original ZX kernel ... and on the second bank ... have modified already the welcome message at the prompt with an hex ... like for example to change the border and paper colour at ...
    repetto74 repetto74 November 2017 Hardware
  • Developing the Spectrum ROMI'm working on some Z80 assembler for a Z80-based single board computer that I'm building. For the things that don't poke my hardware, I'm using a Sp…

    ... handy when finding out what the latest stupidity I've managed ... also using sjasm-plus as the assembler - much nicer than ... latest abortion - when the code for the Spectrum ROM was being developed, presumably ... kind of thing? Even if the ROM is only 16K, that's ...
    Winston Winston December 2006 Development
  • Monitor/debugger that doesn't use the Speccy ROM?Was there ever a Spectrum monitor/debugger released that didn't use the ROM, for key input and character output routines? The reason I ask is that i…

    ... released that didn't use the ROM, for key input and ... output routines?

    The reason I ask is that ... ResiDOS, which runs in the 0-16K area (it ... problem).

    All the debuggers I've used/seen ... far appear to use the standard RST 10 for ...
    glancaster glancaster February 2007 Development
  • Possibly a little OT: Exporting ROM function addresses to the Z88DKOK, so I'm using the Z88DK. It's entirely possible that some documentation has bypassed me. But assume I have a function in ROM, say, at address 0xF0…

    ... entirely compatible with the calling convention used by the z88dk's ... a simple way of telling the linker that function "bar" ... automate a method to export the ROM's symbol table into ... something understood by the z88dk compiler).

    ...
    Winston Winston April 2007 Development
  • Rom upgrade(s) for the Humble spectrum +2 (not 2a or 2b)Hello there my fellow forum chummies, I was thinking today, after reading all this lovely rom burnery stuff, is there a way I could update the ROM o…

    ... a way I could update the ROM on my +2.
    ...
    would the be any project that allows ... , running in parallel with the DivIDE that I have. ... does the spectrum require bus mastering ... when more devices are on the expansion port??

    Zetr0 Zetr0 June 2009 Hardware
  • uses for the interface 2 and ram turbo - rom port?I noticed the games on ebay are quite expensive, I have an interface 2 arriving shortly. I was just wondering if anyone had done any add-ons or used …

    I noticed the games on ebay are quite ... )

    On the atari 8 bit , where the rom port is, someone ... enough know about the pinouts etc of the device to do anything ...
    fog fog November 2009 Hardware
  • Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …

    ... to have the sourcecode I wrote for the Spectrum during the period ... also wish to backup the projects for the Spectrum part of ... document the process used to restore this sourcecode as an hacking ... example for WOS members.

    The O.C ...
    ASM ASM November 2010 Development
  • Use PLAY without the 128 ROMHere's a little thing I wrote called SoftPLAY: [url]http://www.worldofspectrum.org/forums/showthread.php?t=45259[/url] Now you can use the PLAY comm…

    ... mode, say for use with the divIDE or SpectraNet.

    the ROM command in RAM. The timing values may ... faster than the ROM version. The click gaps you hear on the original 128 ... #8;[/b] in place of the PLAY command.

    ...
    chev chev October 2013 Sinclair Basic
  • Which games perform checksums on the 48K ROM?I've just modified a version of the 48K Spectrum ROM designed for use on the Timex Sinclair 2068, so that a 16 bit checksum of the ROM produces the r…

    ... the Timex Sinclair 2068, so that a 16 bit checksum of the ROM ... produces the result $641F and an ... $41. These are the same values as the standard 48K ROM.

    the ROM? I'd like to try the new ROM out on ...
    rga24 rga24 June 2014 Development
  • I don't think I'm getting the $22AA Pixel-Add rom routineDear all, I'm misunderstanding how the PIXEL-ADD rom routine works. My code... [code]ld b,175 ld c,1 call $22AA ld (hl),a ret[/code] So…

    ... /> I'm misunderstanding how the PIXEL-ADD rom routine works.

    the rom routine at $22AA will convert ... a bit confused why the code places the pixel here: [img]http ... , I'm not using the Accumulator in the right way am I ...
    Tobo Tobo March 2016 Development
  • Speeding up programs by hacking the SysVarsPositively pleased to properly discover this area of the forum! I have a couple of recent tricks that might be of interest - they're probably old hat…

    ... properly discover this area of the forum! I have a couple ... loops (for instance), much quicker - the interpreter isn't going to ... on the blog;

    [url="http://robsoft.net/blog/hacking-prog ... -to-speed-up-basic-loops/"]Hacking PROG with NXTLIN to speed ...
    Robsoft Robsoft August 2016 Sinclair Basic
  • Startup colours of the Spectrum ROMHi Folks, Thought I would have a go at changing the startup colours of the Spectrum ROMs used within BasinC which ships with 48.rom (16384 bytes) …

    ... .rom (32768 bytes). Looking in the Complete ROM Disassembly I made the ... [/code]

    In the 48.rom file I changed:

    the ROM that I need to modify ... can't see if from the ROM disassembly.

    Many ...
    Paddy Coleman Paddy Coleman October 2016 Development
  • Mag the Magician - ROM version liberated for free (16K compatible!)Hi all, I just release for free the ROM version of Mag the Magician: [url="http://www.bytemaniacos.com/?page_id=3453"]http://www.bytemaniacos.com…

    ... just release for free the ROM version of Mag the Magician:
    [url ... 3453[/url]

    This ROM is compatible with Interface 2 ... only change your ZX Spectrum ROM with an external one. ... Interface 2 cartridge with this ROM.

    [img]http:// ...
    radastan radastan November 2019 Brand new software
  • learning with the spectrumHello friends! When you load a game into the spectrum (i.e a game for the 48k), how can you guess where is stored its first and its last instructio…

    ... you load a game into the spectrum (i.e a game ... for the 48k), how can you guess ... to 16384 you can find the ROM but..where does a game ...
    Anonymous Anonymous June 2002 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…

    ... . This option is added in the ROM for
    future load-options ... checking

    The ROM will do syntaxchecking for the PRINT-instruction.
    ROM

    The copyright of the ZX ROM belongs to Amstrad. The EPROM ...
    Dr BEEP Dr BEEP December 2002 Sinclair Miscellaneous
  • Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…

    ... Tomahawk to work. It uses the well-known Digital Integration "SECURITY ... a shot at hacking the code-routine (to extract the codes, not to ... and tired quite easily when hacking stuff like this. And these ... anyone have a shot at hacking the codes out of this game ...
    GOC GOC August 2003 Sinclair Miscellaneous
  • A great ROMBack in the early 90s my ZX clone (called "Cobra" if anyone's interested) had a sort of a "SamRam" (actually an alternate ROM accessed via a NMI) tha…

    ... use of the standard ROM routines.

    I searched the 'Net for ... any information or downloads regarding this great ROM ... is absolutely magnificent. I have the ROM (there are also some scarce ...
    GOC GOC August 2003 Sinclair Miscellaneous
  • ROMDoes anyone have a complete list of the routines in the ROM of our beloved ZX Spectrum? Thank you. [ This Message was edited by: wilsonsamm on 2004-…

    Does anyone have a complete list of the routines in the ROM of our beloved ZX Spectrum?
    Thank you.

    [ This Message was edited by: wilsonsamm on 2004-02-08 16:57 ]
    wilsonsamm wilsonsamm February 2004 Sinclair Miscellaneous
  • ANN: Gosh Wonderful ROM new version 1.31All those other version were just leading up to this one - The Gosh Wonderful ROM gw03.rom is a replacement for the standard ROM in emulators that al…

    ... -
    The Gosh Wonderful ROM gw03.rom is a replacement for the standard ROM in ... looks just the same as the standard ROM and runs all the same 16K ... handy as the ROM is compatible with Interface 1 and the M.G ...
    Geoff Geoff October 2004 Announcements
  • Write to ROM=crash?I've read in quite a few places that writing to the ROM causes a crash but on the assembly listing the comments for poke say: "Happily no check is ma…

    I've read in quite a few places that writing to the ROM causes a crash but on the assembly listing the comments for poke say:
    "Happily no check is made as to whether ROM or RAM is addressed."

    Does this mean that pushing a value when SP
    Unique Unique February 2005 Development
<1234567…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
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    Renegade on April 21
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    John Elliott on April 21
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