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  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... internal register in Z80 CPU (MEMPTR) which value is set or ... which Z80 instructions initialize the MEMPTR and which way they do ... it. Now this MEMPTR register is totally cracked in ...
    Vladimir Kladov Vladimir Kladov March 2006 Emulators
  • MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…

    ... 've recently been completing my MEMPTR implementation and have written a ... program[/URL] to verify the MEMPTR docs (which are spot on ...
    Woody Woody April 2008 Emulators
  • MEMPTR: Is it worth emulating?Some advice if you will :) The only info I have on MEMPTR is this document here: [url]http://zx.pk.ru/showpost.php?p=43800[/url] I notice SpecEmu h…

    ... only info I have on MEMPTR is this document here:
    MEMPTR ? Is it just a "geek ... more sources of info regarding MEMPTR?
    Korinel Korinel February 2012 Emulators
  • MEMPTR edge casesFor no particular reason, I've finally got round to emulating MEMPTR in Fuse. A few bits which aren't completely clear to be from the [url="http://zx…

    ... finally got round to emulating MEMPTR in Fuse. A few ... url]:

    * Is MEMPTR set on DJNZ when B ... != 1?
    * Is MEMPTR set on a conditional JR ... conditional JR)
    * Is MEMPTR set on IN register, (C ... the high byte of MEMPTR, it is unaffected by ...
    Philip Kendall Philip Kendall January 2017 Hardware
  • JSpeccy: New emulatorHi there, Jos? Luis S?nchez (zx81 at ono dot com) has developed a new ZX Spectrum emulator in Java, with a very accurate Z80 emulation. The message …

    ...
    - Accurate execution timings
    - MEMPTR internal register emulation
    - Contended ...
    jpablo jpablo March 2010 Emulators
  • Zymosis -- WTFPL'ed Z80 Emulation Corebreaking news! i'm back with another useless project: new Z80 emulation core written in pure C! i hear you screaming: "oh, no! WHY?!" let me tell yo…

    ... ).

    there is no MEMPTR emulation for now, but it ...
    Ketmar Ketmar July 2012 Emulators
  • New Z80 CPU emulation testerI have finally wrapped up the new [URL="http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester package[/URL] I have previously announced in [URL…

    ... have even thrown in basic MEMPTR test as a bonus, even ... free to provide the proper MEMPTR test vectors here if you ...
    Patrik Rak Patrik Rak December 2012 Emulators
  • A few questions on the Z80A cpuI know this has been discussed before and I read (a while back) the post which goes over the different Z80A CPUs ...(CMOS, NMOS? can't recall exactl…

    ... Flags and also tests the MEMPTR.

    On the Z80 ... hehe

    On the MEMPTR test everything passed.

    thomas3120 thomas3120 May 2013 Hardware
  • New version emulator ZEsarUX 0.6Hi I have uploaded a new version of my ZX Spectrum/ZX80/ZX81 emulator. Changes are: Added ZX Spectrum smp tape loading (raw audio) Added Image stab…

    ...
    Added experimental support for MEMPTR register - not enabled by default ...
    chernandezba chernandezba April 2014 Emulators
  • JSpeccy 0.93A new JSpeccy version has been released. Summary of changes, - Drag & Drop support forTAP/TZX/CSW/SNA/SP/Z80/SZX/ROM files. - Command line options …

    ... ).

    - Full emulation of MEMPTR hidden register.

    - Confirmation ...
    zx81 zx81 April 2014 Emulators
  • New version emulator ZEsarUX-2.0Hi I have uploaded a new version of my ZX80/81/Spectrum/Z88 emulator on [url]http://sourceforge.net/projects/zesarux/[/url] Changes are: Added Ca…

    ... offset on ZX81
    Fixed MEMPTR value on some opcodes
    chernandezba chernandezba January 2015 Emulators
  • [NEW] Retro Virtual Machine v1.0.0 for OSX released!!!!Here it is! Retro Virtual Machine v1.0.0 RELEASED!!!! Many thanks first to Patrik Rak for the PZX format and for their Z80 tests without which RVM…

    ... /> Complete Z80 emulation, including the ‘memptr’ register and the hidden flag ...
    jcgamestoy jcgamestoy September 2015 Emulators
  • Fuse 1.3.3 releasedA new release of Fuse, the Free Unix Spectrum Emulator, is now available at the SourceForge project: https://sourceforge.net/projects/fuse-emulato…

    ... /> [*] Add support for the hidden MEMPTR register
    [*] Mark new disks ...
    Fred Fred February 2017 Emulators
  • Fuse for macOS 1.3.3 ReleasedA new version of Fuse for macOS has been released at the dedicated sourceforge project: https://sourceforge.net/projects/fuse-for-macosx/ Note …

    ... /> [*] Add support for the hidden MEMPTR register (thanks, Boo-boo, Vladimir ...
    Fred Fred February 2017 Emulators
  • ZX ULAX emulatorYet another "enhanced" Spectrum emulator for those interested. Some of you might have seen the videos on this channel: https://www.youtube.com/…

    ... interface, pentagon timings only, no MEMPTR, no AY sync to Z80 ...
    Lethargeek Lethargeek November 2019 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... bits of the flag register. MEMPTR is a another level of ...
    Philip Kendall Philip Kendall April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... bits of the flag register. MEMPTR is a another level of ... the Spectrum that relied on MEMPTR, then from an every-day ...
    Dunny Dunny April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... software yet that uses the MEMPTR effect for encryption purposes.
    GOC GOC April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... software yet that uses the MEMPTR effect for encryption purposes.
    [/quote]

    MEMPTR is a hw implementation detail ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... i am the founder of MEMPTR investigation project.
    of course ...
    boo_boo boo_boo April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... correspond with your finding of MEMPTR = rp1_before_operation + 1. If I add ...
    Fraser Fraser April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... with its exact rules how Memptr is initialized or changed in ... while Boo-boo worked on Memptr :) ).
    Vladimir Kladov Vladimir Kladov April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... correspond with your finding of MEMPTR = rp1_before_operation + 1. If I add ...
    Philip Kendall Philip Kendall April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... MSB and LSB or the MEMPTR separately as you in this ... our case:
    CPI: MEMPTR++
    CPD: MEMPTR-- (in both cases as ... that the main purpose of MEMPTR in the CPU is to ... is always important too: if MEMPTR decremented when LSB = 0 we ...
    Vladimir Kladov Vladimir Kladov April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... MSB and LSB or the MEMPTR separately as you in this ... our case:
    CPI: MEMPTR++
    CPD: MEMPTR-- (in both cases as ... that the main purpose of MEMPTR in the CPU is to ... is always important too: if MEMPTR decremented when LSB = 0 we ...
    Luca Luca April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... and DEC16 are not affects MEMPTR. actually, INC/DEC BC are ... used in MEMPTR decrement cycle in our tests ...
    boo_boo boo_boo April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... internal register in Z80 CPU (MEMPTR) which value is set or ... which Z80 instructions initialize the MEMPTR and which way they do ... it. Now this MEMPTR register is totally cracked in ...
    The President The President April 2006 Emulators
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... ,AF' -- these doesn't affect MEMPTR value. it seems to me ...
    boo_boo boo_boo April 2006 Emulators
  • The new GP2Xpectrum releases threadYeah, I know the thread title isn't exactly too original, but I've decided that just one post to hold all updates makes more sense than a lot of smal…

    ... /forums/showthread.php?t=11427]MEMPTR hidden register[/URL], but I ...
    Metalbrain Metalbrain December 2006 Emulators
  • ZXSpin 0.61 Available nowHi all! Well, after a lengthy few testing cycles, I'm taking the plunge and uploading the latest version of ZXSpin, to replace the rather aged old 0…

    ... emulated as per the FAQ - MEMPTR isn't emulated as there ...
    Dunny Dunny December 2006 Emulators
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  • MEMPTR finally crackedThis post is mainly for emulator developers.<br /> <br /> As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which v…
  • MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…
  • MEMPTR: Is it worth emulating?Some advice if you will :)<br /> <br /> The only info I have on MEMPTR is this document here:<br /> [url]http://zx.pk.ru/showpost.php?p=43800[/url]<b…
  • MEMPTR edge casesFor no particular reason, I've finally got round to emulating MEMPTR in Fuse. A few bits which aren't completely clear to be from the [url="http://zx…

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