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<1…16171819202122…34>
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... then use it as the initial state for a different machine ... in RAM relating to the contents of the disk. It would ...
    zub zub February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... addresses, or otherwise test the contents of ROM by some means ... all passed straight from the Z80 to the expansion bus.
    zub zub February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... also paged in whenever the Z80 fetches an
    instruction ... also paged in whenever the Z80 fetches an
    ... time compilation, which I believe Z80 adopted — certainly, JPP did), ... Saving the DISCiPLE RAM contents to disk should be perfectly ...
    zub zub February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... appearently things are settled when Z80 'returns' for more business. ... subsequent bytes read by the Z80 for execution of that ... would cause any delay. Z80 does some internal machine cycles ... /> You may theoreticly loose the contents of a register, which you ...
    roko roko February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... . When NMI is pressed then Z80 first must finish some of ... to be wrongly set (and contents of the AF register to ...
    zub zub March 2013 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…

    ... retrieve the complete address bus contents using the ULA DRAM address ... wait cycle added by the Z80 logic, this time window is ... data bus for VRAM and Z80 I/O data. For ... available[/B], as the Z80 can start an I/O ... handler is IORQ from the Z80. The ULA decodes A0+ ...
    mcleod_ideafix mcleod_ideafix March 2013 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…

    ... inputs, form the address bus contents.[/QUOTE]

    A14 and ... data bus for VRAM and Z80 I/O data. For the ... directly available[/B], as the Z80 can start an I/O ... that time, the address bus contents are not available. The only ...
    Mr X Mr X March 2013 Hardware
  • Interface 1 bisOk, well the postmans just been and brought with him my new arrival, the Interface 1 bis. So as promised I thought I'd share some initial usage exper…

    ... standard 48k ROM contents ?..[/QUOTE]

    After loading Z80 snapshots using ...
    Dan Antohi Dan Antohi March 2013 Hardware
  • Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…

    ... control lines between the Z80 CPU and the rest ... circuit) will prevent the Z80 CPU from reading the correct ... from the ROM. The Z80 will then only read rubbish ... , you can read the contents of the ROM. You ... you can read the ROM contents into the PC.
    ...
    1024MAK 1024MAK March 2013 Hardware
  • Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…

    ... control lines between the Z80 CPU and the rest ... circuit) will prevent the Z80 CPU from reading the correct ... from the ROM. The Z80 will then only read rubbish ... , you can read the contents of the ROM. You ... you can read the ROM contents into the PC.
    ...
    xaris_sm xaris_sm March 2013 Hardware
  • How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...

    ... original intention with the Z80 was to do 8 ... br />
    The z80 was always intended to use ... always come because the z80 is 8080 compatible. The ... the 8080 to the z80, has persisted through folklore ... perfectly with transferring the contents of register files on ...
    Alcoholics Anonymous Alcoholics Anonymous April 2013 Development
  • Buzzer sounds tips'n'tricksSo I have an ARM Cortex M3 with a buzzer connected to its GPIO pin. And because I read this forum I know that there is no need to add a separate buzz…

    ... limited by the speed of Z80 processing. Here you're alternating ... the speaker according to the contents of the buffer. At least ... have to do on the Z80!
    joefish joefish May 2013 Development
  • Which ULA?Just a quick question, more of interest rather than immediate need... I am thinking ahead about the repair of an Issue 2 board, and also an Issue 6A …

    ... in getting anywhere beyond the initial screen.

    I can ... would the next step be? Z80? lower RAM?

    All ...
    Simon_Carr Simon_Carr June 2013 Hardware
  • Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…

    ... ]This is the problem -- the z80 can't efficiently access stack ... being printed, along with the initial zero-loaded entry to DOS ... out the deficiencies in the z80 compilers.[/QUOTE]

    Thank ...
    u6c87 u6c87 June 2013 Development
  • Interface 1 bisOk, well the postmans just been and brought with him my new arrival, the Interface 1 bis. So as promised I thought I'd share some initial usage exper…

    ... =Hern?n;705700](loading 128K .z80 creates an instant reset).[/QUOTE ... />
    That is because 128k .Z80 snapshots are not supported.
    contents to become corrupted if the ...
    Dan Antohi Dan Antohi June 2013 Hardware
  • Interface 1 bisOk, well the postmans just been and brought with him my new arrival, the Interface 1 bis. So as promised I thought I'd share some initial usage exper…

    ... ;705740]That is because 128k .Z80 snapshots are not supported.
    contents to become corrupted if the ...
    Hernán Pablo Álvarez Hernán Pablo Álvarez June 2013 Hardware
  • Help finding a CD-ROMHi friends. I would like to find a cd that was named "World of Emulators". It has a lot of Spectrum games and curious demos. I bought it between 1994…

    ... /> Neither the disc nor the contents allude to a possible publisher ... , mac, pack (arj and zip), z80, zipped, zx81.

    Within ... 'z80' are two folders holding Spectrum ...
    MarkTheMorose MarkTheMorose June 2013 Sinclair Miscellaneous
  • Help finding a CD-ROMHi friends. I would like to find a cd that was named "World of Emulators". It has a lot of Spectrum games and curious demos. I bought it between 1994…

    ... /> Neither the disc nor the contents allude to a possible publisher ... , mac, pack (arj and zip), z80, zipped, zx81.

    Within ... 'z80' are two folders holding Spectrum ...
    Kedindin Kedindin June 2013 Sinclair Miscellaneous
  • Can I view programs on old tape on a PC?Hello, first post, so I hope I'm at the right place. I recently discovered a very old spectrum tape with the experiments of my youth on basic. I don'…

    ... so I can't install z80-400 or wav2tzx. I may ... />
    I have converted the initial recording into 8bit mono 44100Hz ... ]

    Here is the initial [B]Stereo[/B] recording (in ...
    lascetic lascetic July 2013 Sinclair Miscellaneous
  • Bug in Super Wonder Boy in Monsterland?Hello!:smile: This game seems to have a bug that prevents finalize. The dragon that is in the last level, it is impossible to kill.Remains static.No…

    ... ://www.speccy.org/metalbrain/pause48k.z80[/url]

    PD: Details ... value at $B058 for the initial pause from 0179 to 0172 ... timing will just require another initial value here.
    Metalbrain Metalbrain August 2013 Games
  • Bug in Super Wonder Boy in Monsterland?Hello!:smile: This game seems to have a bug that prevents finalize. The dragon that is in the last level, it is impossible to kill.Remains static.No…

    ... ://www.speccy.org/metalbrain/pause48k.z80[/url]

    PD: Details ... value at $B058 for the initial pause from 0179 to 0172 ... timing will just require another initial value here.[/QUOTE]

    jp jp August 2013 Games
  • coding guruOk I'm looking for a to help me in my quest to do my first proper game. The 80's child in me thinks he can do it, But the 2013 man in me knows zip. …

    ... World" on a kit made z80 when I was 12. 33 ... advice was based on your initial post, where you wrote that ...
    Einar Saukas Einar Saukas September 2013 Sinclair Miscellaneous
  • Emulating a +2A with floating bus modBefore I start hacking Fuse's source... Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus…

    ... =Philip Kendall;727762]Well, my initial thought on seeing the thread ... it very helpful when writing Z80 code. Being relatively new to ... Z80 programming, I make a lot ...
    stephenw32768 stephenw32768 October 2013 Emulators
  • MOVE_M Object Movement Manager for BASICAs moving things around on the screen is usually the slowest part of a game written in BASIC, I've been pottering around with this routine to handle …

    ... for the time being. The initial run POKEs some hex code ... included as well as a Z80 snapshot. There's still ... /> Move_M.ASM, Move_M.BAS, Move_M.Z80, Move_Mnew.GIF
    - program ... runner demo
    Move_Mg.Z80, Move_Mg-RUN.Z80
    - uninitialised & ...
    Battle Bunny Battle Bunny October 2013 Sinclair Basic
  • Assembly - Loops bigger than 255Hi, It looks like it's a bit difficult to make loops with more than 255 cycles on Z80 machine code, since the 16-bit decrements (DEC) do not alter a…

    Initiating lying down sequence!

    Z test is on the contents of A! No, perhaps not. Lying down continuing!

    GO TO fridge
    THEN go home
    LET me consider not writing things in Z80 anymore today
    DIM!
    jamorski jamorski October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ...
    add a, (hl) ; add contents of mem-5-1
    call z, out_code ; print initial zero if so

    chev chev October 2013 Development
  • Collision detection for interlocking shapes[SIZE=3][FONT=Calibri]I?m looking for some advice as I?m not sure how to resolve the following problem. I have an in memory structure that holds info…

    ... difference between them.
    In Z80 ASM it might look something ... /> LD HL, (IX+4) ; get initial addresses of objects
    LD ...
    i love the z80s i love the z80s October 2013 Development
  • Spectrum CP/MHello.. Just out of curiosity, has anyone actually used +3 CP/M for any practical purpose? I remember booting it up a couple of times years ago, jus…

    ... chip. There's high initial cost but low unit ... peripherals to monitor the z80 for execution of the ... is built into the standard z80 peripheral chips (SIO, PIO ... placing hw between the z80 and the outside world. ... biggest problem with the z80 is the 64k address ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Sinclair Miscellaneous
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