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<1…20212223242526…34>
  • A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…

    ... already a 128k version of zxodus, running on basic interrupt, while playing ...
    Einar Saukas Einar Saukas March 2012 Brand new software
  • Strange behaviour in real hardware but not in emulatorsWell, at least not in any emulator I've tried. I've been reported by fellow forum member Macc that both our Maritrini Monster Slayer and Retroworks'…

    ... , 5 or 7 on a 128K/grey +2).

    For ... you might miss the odd interrupt and your music may slow ...
    Jmk Jmk March 2012 Emulators
  • A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…

    ... as how to call another interrupt routine after BIFROST*, how to ... BIFROST* release, that will provide 128K support.
    Einar Saukas Einar Saukas March 2012 Brand new software
  • ULA snowHow is this feature implemented in emulators ? And how exact is the emulation ? I somehow supposed that ULA snow is something that is not very determ…

    ... to contended areas, even when interrupt is disabled?

    Hmmm ... hardware? (i.e. if the interrupt needs to collect byte $BFFF ... the 50-times-per-second interrupt that occurs during the screen ... you are referring to the 128K Spectrum and active screen is ...
    BloodBaz BloodBaz March 2012 Emulators
  • ULA snowHow is this feature implemented in emulators ? And how exact is the emulation ? I somehow supposed that ULA snow is something that is not very determ…

    ... to contended areas, even when interrupt is disabled?[/QUOTE]

    128K games use RAM 1 and ... 'm guessing most of my 128K games crash on real hardware ...
    na_th_an na_th_an March 2012 Emulators
  • Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…

    ... 8762 T-states after the interrupt occurs.[/strike] More specifically, to ... T-states have passed since interrupt.
    [/LIST]
    We still ... T-state on the Spectrum 128K, thus we cannot deduce the ...
    Einar Saukas Einar Saukas May 2012 Emulators
  • GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…

    ... hw support (eg a timer interrupt tied to NMI which causes ... is memory. The 48k and 128k machines can't do it ...
    Alcoholics Anonymous Alcoholics Anonymous May 2012 Development
  • GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…

    ... hw support (eg a timer interrupt tied to NMI which causes ... is memory. The 48k and 128k machines can't do it ...
    retrogod retrogod May 2012 Development
  • Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…

    ... contention is identical to Spectrum 128K/+2, except it happens 5602 ... 8759 T-states after the interrupt, and repeats every 228 T ... cases, the difference between Spectrum 128K (with TK90X or 48K ROM ... contention pattern as the Spectrum 128K but 5602 T-states earlier ...
    Einar Saukas Einar Saukas August 2012 Emulators
  • Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…

    ... timings are identical to Spectrum 128K/+2, except everything happens ... passed since the last interrupt until the point marked ... test on a Spectrum 128K produces the following results:< ... Moreover, the difference between Spectrum 128K and TK90X were exactly 5602T ...
    Einar Saukas Einar Saukas August 2012 Emulators
  • redirecting Z80 sub-routine CALLsI'm working on changing a TR-DOS disk program to work from standard +128k tape and thought that rather than painstakingly working through the code ma…

    ... program to work from standard +128k tape and thought that rather ... the address and trigger an interrupt), the rest you could do ...
    tstih tstih August 2012 Development
  • WibbleBibble's Basic threadHi in an attempt to keep my questions from spamming the forum. I think its better to put them all in one place. Thanks everyone so far, I feel I am …

    ... in the ROM's keyboard interrupt routine. Jumping to the RET ... from 23552 (48k) or 23296 (128k) then it's likely to ...
    Battle Bunny Battle Bunny August 2012 Sinclair Basic
  • Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…

    ... ". (Edit: also tested with a 128K toastrack, it works fine with ... number of cycles since the interrupt, and see if this is ...
    Winston Winston September 2012 Hardware
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... />
    To be compatible with 128K machines more easily, a revision ... the Spectrum, and use the interrupt signal to begin the T ... an alternative sync mechanism. For 128K users, provide a short cable ... has - but to support 128K machines, a video interface also ...
    Winston Winston October 2012 Sinclair Miscellaneous
  • recovering the stack after an errorMy normal error handler starts with the stack as reset by LD SP,(ERR_SP) in $0053 ERROR_2, sets up some stuff and returns to BASIC via a "JP C,$1e73 …

    actually, in 48k basic interrupts stays disabled. but in 128k routine at #5B01 (which does ROM swapping) contains DI followed by EI. this is the cause of your problems with mysterious interrupt re-enabling.
    Ketmar Ketmar October 2012 Development
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... />
    To be compatible with 128K machines more easily, a revision ... the Spectrum, and use the interrupt signal to begin the T ... an alternative sync mechanism. For 128K users, provide a short cable ... has - but to support 128K machines, a video interface also ...
    BloodBaz BloodBaz October 2012 Sinclair Miscellaneous
  • Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …

    ... 48K and 128K V6Z80p Spectrum cores; the video timing/interrupt and ... the original machines (48K and 128K).

    I've ... the Illusion demo on the 128K uncontended core and actually ... to the Pentagon video timing/interrupt implementation.

    I ...
    adorigatti adorigatti October 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... implement more cool things (like interrupt raster, or even a complete ... chip on FPGA and bring 128K sound to the rubber key ...
    mcleod_ideafix mcleod_ideafix November 2012 Hardware
<1…20212223242526…34>

Latest Posts

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