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Search Again :: Adv Search 783 results in 0.002s
<1…11121314151617…27>
  • 4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…

    ... (in other words, exactly a CMOS inverter). All you need is ...
    Winston Winston March 2012 Hardware
  • 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]…

    ... /> // Loading Tiles
    #asm
    scf
    xor a
    ld ... , 17
    call 0556h
    scf
    ld a, 255
    // Loading Engine
    #asm
    scf
    xor a
    ld ... , 17
    call 0556h
    scf
    ld a, 255
    Timmy Timmy March 2012 Brand new software
  • rotating HL left through CarryI've tried this several ways, and it works for a while, then a particular value has a bit set in an inconvenient place and it all goes to pot. Eg: "…

    ...
    JR Z,notset1
    SCF
    notset1:
    RL L ...
    Stefan Drissen Stefan Drissen March 2012 Development
  • LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…

    ... /> with this:
    [CODE]
    scf
    rr c ;C =zw ...
    Einar Saukas Einar Saukas March 2012 Development
  • Microdrive units with weak (not dead) ULAs...Hi everybody, I've got a Microdrive unit here. It didn't work. It does now (actually, it was the ribbon had broken and the ground had lost contact, …

    ... small "cockroach board" with a CMOS buffer should do the job ... gate tri-state TTL compatible CMOS buffer, just wire the enable ...
    Winston Winston March 2012 Hardware
  • Multicolour demo using z88dk + BIFROST* (+source)This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/sho…

    ... // Loading Tiles
    #asm
    scf
    xor a
    ld ...
    call 0556h
    scf
    ld a, 255
    #asm
    scf
    xor a
    ld ...
    Einar Saukas Einar Saukas March 2012 Development
  • Shadow registers.I assume it's faster to transfer the registers to the shadow registers rather than using the stack? Let's say that I want to temporarily preserve the…

    ... z80, in particular the later CMOS version, will work with these ...
    Alcoholics Anonymous Alcoholics Anonymous March 2012 Development
  • Multicolour demo using z88dk + BIFROST* (+source)This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/sho…

    ... ; hl = start of token
    scf
    ret

    notoken ...
    Alcoholics Anonymous Alcoholics Anonymous March 2012 Development
  • ISO-Copy - Individual Software revisitedHi folks In another thread about Supertape: [url]http://www.worldofspectrum.org/forums/showthread.php?t=36203[/url] ... we touched on ISO-Copy by th…

    ... needed registers setup
    5CEA SCF
    5CEB CALL 05C5 ; Call ...
    jlsoler jlsoler May 2012 MIA/STP/SDP
  • ZX Spectrum ULA core available at OpenCoresHi! On April, 23th, I opened a new project at the OpenCores website: [url]http://opencores.org/project,zx_ula,Overview[/url] Right now, it has a, h…

    ... and Flash and a 20MHz CMOS Z80.

    I'd ...
    JonS JonS May 2012 Hardware
  • DK Tronics Compilation Tapes....MIA ??I have two tapes (no inlays) of compilaitons of DK Tronics games. One is from DK Tronics themselves, has a white label with black text, and contains…

    ... /> 16392 XOR A
    16393 SCF
    16394 EX AF,AF ...
    Andrew Barker Andrew Barker May 2012 MIA/STP/SDP
  • I might try building a barebones PC.Our Packard Bell iMedia 5077 is literally on its last legs. Every time it is switched on something doesn't work, usually it is the sound, sometimes i…

    ... BIOS settings: sometimes by default (CMOS cleared / new BIOS flashed) some ...
    RetroTechie RetroTechie May 2012 Chit chat
  • I might try building a barebones PC.Our Packard Bell iMedia 5077 is literally on its last legs. Every time it is switched on something doesn't work, usually it is the sound, sometimes i…

    ... BIOS settings: sometimes by default (CMOS cleared / new BIOS flashed) some ...
    Alien 8 Alien 8 May 2012 Chit chat
  • z88dk vs. sdccI've just read this article (in Spanish) [url]http://www.cpcmania.com/index2.asp?urldest=Docs/Programming/SDCC_vs_z88dk_Comparando_tama%F1o_y_velocid…

    ... />
    ld hl,0
    scf
    ret
    [/code]
    Alcoholics Anonymous Alcoholics Anonymous May 2012 Development
  • My Pc doesn't work in my office...it's a strange, thing, he works perfectly at home, and other places, but for 2 weeks now, every time I try to use it in the office (the place i need …

    ... BIOS setup screen, sometimes my CMOS memory is gone as well.
    Timmy Timmy May 2012 Chit chat
  • My Pc doesn't work in my office...it's a strange, thing, he works perfectly at home, and other places, but for 2 weeks now, every time I try to use it in the office (the place i need …

    ... steps above but remove the CMOS battery, wait a while and ...
    zxbruno zxbruno May 2012 Chit chat
  • SUPER INPUTA couple days ago I searched for an "INPUT string" routine that I could use in Assembly programs and supported multiple lines, but I found none. Thus…

    ... ,(WORKSP)
    push de
    scf
    sbc hl,de
    Einar Saukas Einar Saukas June 2012 Development
  • 4116 replaced by 4164 - "Noisy" paper?After I replaced my 4116's with 4164's and hooked them up to +5V, disconnected -5V and +12V, I have what looks like vertical lines in the paper, like…

    ... "interference" can happen with a CMOS Z80 CPU (which has much ...
    Winston Winston June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    It would be best if you can get hold of a Zilog Z80, there are some timing issues with the NEC cpus. Also dont get CMOS cpu as there are some difference in those too, compared to the NMOS ones.
    Johan1973 Johan1973 June 2012 Hardware
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ... br /> call lib_nibble_l
    scf ; in write loop

    scf ; write all digits
    jp ... /> call stdio_num2char
    scf
    push af ; ...
    Alcoholics Anonymous Alcoholics Anonymous June 2012 Development
  • Internal amp and signal cleaner for tape inHello! Is there known to work INTERNAL schematic which cleans signal from tape in and amplifies it. I need such thing so i can load from my smartpho…

    ... output impedance. (I have some CMOS op-amps which will increase ...
    Winston Winston July 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... not for the most part CMOS.

    Just keep at ...
    Johan1973 Johan1973 July 2012 Hardware
  • T-States?Can anyone point me to any good reading (or summarise) that will explain exactly what a tstate is? At the moment for me, tstates are a useful gauge …

    ... (the transition from NMOS to CMOS in the '70s, a reimplementation ...
    Alcoholics Anonymous Alcoholics Anonymous July 2012 Development
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... they use some sort of CMOS cells to store programming, just ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Do you like... silence?Well... :wink:

    ... leaving a pin on a CMOS chip floating. I suspect it ...
    Winston Winston August 2012 Chit chat
  • 40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…

    ... hl,overscratch
    nextovershiftline
    scf
    rr (hl)
    inc ...
    uglifruit uglifruit August 2012 Development
  • Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…

    ... simple oscillator circuit using a CMOS inverter. I just happened to ... ]

    Use a plain CMOS inverter (no schmitt trigger!) with ...
    RetroTechie RetroTechie August 2012 Hardware
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