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  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    ... in z80, it's returning with the carry flag set (or reset ... , whichever is convenient). Testing for zero in z80 involves wrecking ...
    Alcoholics Anonymous Alcoholics Anonymous December 2010 Development
  • How the spectrum generates the video from ramHi everyon, I know that most people here allready know this but i think i found out how the spectrum acctually dispalys stuff and why the LD x, (HL)…

    ... containing the display, the z80 can happily access the other ... is called uncontended -- the z80 will always run at ... ram. Every time the z80 writes to iots display ... simply and without stopping the z80.

    Another ... are individually set and reset.
    Alcoholics Anonymous Alcoholics Anonymous January 2011 Hardware
  • Speedlock - a loader or a virus?Believe it or not, my rubber refuses to load 100% anything Speedlock related. At least the later ones used in 1988-1990 games. I was using the output…

    ... was a copy), and so reset. A software pirates worst nightmare ... actually executes ASCII text as Z80 instructions! It's not impossible ...
    Marko Marko February 2011 Games
  • ZX Poly - wow!Hi Folks, Came across the following: [url]http://www.igormaznitsa.com/zxpoly/zxpoly.html[/url] Has anyone else seen this before? I am no hardware…

    ... that has it's program reset at the start of every ... around the contention of the Z80/ULA or how many attributes ...
    sack sack February 2011 Hardware
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... project :-) There are some common z80-isms such as "or a ... accesses are indexed. Even though z80 assemblers accept "ld (ix),0 ... is reached when the single reset bit in b is rotated ... of years of staring at z80 code.

    * The code ...
    Alcoholics Anonymous Alcoholics Anonymous March 2011 Development
  • Rendering techniques in emulatorsI've been giving thought to the possibility of speeding up the rendering in Zero considering I've been putting it off long enough. My approach is c…

    ... flagged as true. Once done, reset all the flags to false ... three threads. One for the Z80 and AY emulation, running at ... only get rendered when the Z80 emulation thread is waiting (sleeping ...
    Dunny Dunny April 2011 Emulators
  • Rendering techniques in emulatorsI've been giving thought to the possibility of speeding up the rendering in Zero considering I've been putting it off long enough. My approach is c…

    ... flagged as true. Once done, reset all the flags to false ... three threads. One for the Z80 and AY emulation, running at ... only get rendered when the Z80 emulation thread is waiting (sleeping ...
    Arjun Arjun April 2011 Emulators
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... (I say "allowed" since with Z80 you're only going to ... have a simple set semaphore/reset semaphore syscall everything can take ...
    Winston Winston April 2011 Development
  • Which Spectrum Game Pushed The Machine To It's Limits? 128kWhere Time Stood Still? Chase HQ? Robocop? Suggestions?

    ... , which starts with a freshly reset Speccy.
    1) Reload the ... /> 2) Load a source file (Z80 code in rem statements) that ... bit.
    10) Observe Speccy reset itself, clear memory, and give ...
    gadgetmind gadgetmind April 2011 Games
  • Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…

    ... the game screen appears and reset the Spectrum
    * If I ... a couple seconds later, system reset. If I try to reload ... .
    * SRAM pin 1 to Z80 pin 4
    * SRAM pin ... 27 to Z80 pin 22
    * SRAM pin ...
    Mobutu Mobutu April 2011 Hardware
  • Speccy2010 - pentagon emulation using GlukIs anyone here familar with Speccy2010 (FPGA Russian Sinclair Spectrum clone). ? I'm using Pentagon mode on Speccy2010 (it uses something called Glu…

    ... rom (new rom page with RESET SERVICE MONITOR)

    ... page and is connect after RESET. But exist more GLUK ... or second videoram
    - show Z80 registers
    - can format ram ... /> - contain demo (press reset+D)
    - keyboard test (reset+any two keys ...
    velesoft velesoft April 2011 Hardware
  • 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…

    ... spat out by your average z80 assembler. Indeed, you could, if ... way you would create any z80 program, they are equivilent... If ... basically a binary blob of z80 instructions, processed in the same ... booted when the machine was reset. The games themselves don't ...
    kgmcneil kgmcneil April 2011 Emulators
  • ZX Spin loading problemsHello everyone. I'm having some problems loading tape files (particularly TZX files) into Spin. Most of the time they load fine and the game works a…

    ... +3 disk causes machines to reset, something which the Spin team ... like TAP as already suggested, Z80 and DSK image versions. Also ...
    Andrew Barker Andrew Barker May 2011 Emulators
  • Frank N SteinThis one > [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0001849[/url] Always seems to crash about level 7 (maybe a bit more) or so with an …

    ... do exhibit some very odd Z80 coding!

    I did ... 7341 ($1CAD)
    CALL 64111 (reset to #2 and TEMPS)[/CODE ...
    Jimmy Jimmy May 2011 Games
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ... . And the reset switch uses the reset pin of the Z80 which sets ...
    chev chev May 2011 Emulators
  • Question about divide +Hi A friend has sent my a faultly divide + to see if I can repair it. If I use this divide+ with a spectrum 48K (That works perfectly with my stand…

    ... for easy loading of TAP/Z80 files, although it's read ... IM2 vector
    3) add reset button (usable on ZX Spectrum ... 14/48kB models without reset button)
    4) as bonus ...
    velesoft velesoft May 2011 Hardware
  • Speccy2010 - pentagon emulation using GlukIs anyone here familar with Speccy2010 (FPGA Russian Sinclair Spectrum clone). ? I'm using Pentagon mode on Speccy2010 (it uses something called Glu…

    ... rom (new rom page with RESET SERVICE MONITOR)

    ... page and is connect after RESET. But exist more GLUK ... or second videoram
    - show Z80 registers
    - can format ram ... /> - contain demo (press reset+D)
    - keyboard test (reset+any two keys ...
    Hercules Hercules May 2011 Hardware
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ... wait a minute! Ok, my Z80's put all registers to ... RC circuit pulls down the reset line for a brief ... 've tried pressing the reset button while I power on ... the machine, hold the reset button for a few seconds ... Could it be that the reset condition affects only to a ...
    mcleod_ideafix mcleod_ideafix May 2011 Emulators
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ... when I do a reset using the button?[/quote]< ... br />
    The reset button is hooked up to ... registers to 0. But the RESET line is *not* invoked ... the machine, hold the reset button for a few seconds ... the Z80 must already be running for the RESET line ...
    chev chev May 2011 Emulators
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ...
    [B]Zilog Z0840020PEC. CMOS Z80 CPU, 20MHz[/B]

    reset (using the reset button with the computer ...
    In the "The undocumented Z80 documented" this can be read ... ).
    Also since the Z80 is 8080 compatible, interrupt mode ...
    mcleod_ideafix mcleod_ideafix May 2011 Emulators
  • Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…

    ... possible to make this game reset. Example: In the room where ... disco room. The game will reset. Tested tap,tzx and .z80 files.
    Bandit Bandit May 2011 Infoseek database
  • JSpeccy 0.88.4 releasedA new JSpeccy has been released. The main changes are: [LIST] [*]Resolves a problem in AY emulation code what affects the sound of Retrowork's game …

    ... ]
    [*]Updates the reset method at the Z80 core with the mcleod_ideafix ... to select which type of Z80 to use, which means presumably ...
    chev chev June 2011 Emulators
  • 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…

    ... main manuals I use ("Zilog Z80 CPU user's manual", Zaks ... ' "Programming the Z80" and Sean Young's "The ... Undocumented Z80 Documented") are pretty inconsistent - ... was NOT 00H before operation; reset otherwise" (Zilogs's manual, ...
    PeterP PeterP June 2011 Emulators
  • 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…

    ... 4 of [url=http://www.z80.info/z80code.htm]this ZINT ... manual from www.z80.info[/url] gives you all ... the H flag to be reset ($B -$5 in the right ...
    ccowley ccowley June 2011 Emulators
  • 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…

    ... ;543753]Am I right that Z80 microprocessor makes no real distinction ... adding 255.

    The Z80 may well be doing a ... was NOT 00H before operation; reset otherwise" (Zilogs's manual, completely ...
    gasman gasman June 2011 Emulators
  • Fuse: what do you want to see?An open brainstorm. If you had a team of programmers working on [url=http://fuse-emulator.sf.net/]Fuse[/url], what would you tell them to work on? …

    ... a peripheral, it's a Z80 computer! It CAN boot ANY ... is inserted and FDD3000 is reset to boot CP/M
    Encarnado Encarnado July 2011 Emulators
  • z80 Startuphi everyone, does the z80 upon start up reset all registers (including A) to 0? Many thanks, Robin

    ... not being reset) because im (still) making a z80 computer and i ...
    Robin Robin August 2011 Hardware
  • 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…

    ... /> read_keyboard();
    T_states=0 // T_states reset so that we re-execute ... look like, I implemented it (reset IFFs, push PC on the ... machine code or even in Z80 assembly.
    PeterP PeterP August 2011 Emulators
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