/media/sda-magnetic/david/Dok-15-2023-11-27/informatik/z80-and-co-2024-03-13/z80.txt

1.) Anschlüssle Bausteine
    1.1.) Zilog Z80

        D0 : D7
        A0 : A15
        INT*
        NMI*
        Halt*
        MREQ*
        IORQ*
        Rfsh*
        M1*
        Reset*
        BusRq*
        Wait*
        BusAk*
        WR*
        RD*
        VCC
        Gnd*


        A15 : A0: Address Bus (output, active High, tristate).
        BUSACK: Bus Acknolowdgement (output, active low). Indicates to the requesting device that
            CPU Address Bus
            Data Bus
            Control Signals MREQ, IORQ, D and WR
        have their high-impadance states
        BUSREQ: Bus Request (input, active low)
            CPU Address Bus
            Data Bus
            Control Signals MREQ, IORQ, D and WR
        HALT: Indicates that the CPU has executed a HALT instruction
                and is waiting for either a nonmaskable or a maskable interrupt
        INT. Interrupt Request (input, active Low). An Interrupt Request is generated by I/O devices.
        D7–D0. Data Bus (input/output, active High, tristate).
        IORQ. Input/Output Request (output, active Low, tristate). IORQ indicates that the lower half of the address bus holds a valid I/O address for an I/O read or write operation
        M1. Machine Cycle One (output, active Low). M1, together with MREQ, indicates that the current machine cycle is the op code fetch cycle of an instruction execution.
        MREQ. Memory Request (output, active Low, tristate). MREQ indicates that the address bus holds a valid address for a memory read or a memory write operation.
        NMI. Nonmaskable Interrupt (input, negative edge-triggered). NMI contains a higher priority than INT. NMI is always recognized at the end of the current instruction, independent of the status of the interrupt enable flip-flop, and automatically forces the CPU to restart at location 0066h.

    1.2.) ROM
    1.3.) PIO Z84
    1.4.) LCD
2.) Assembler Befehle Z80
3.) LCD-Routines



https://wwwhomes.uni-bielefeld.de/achim/z80-asm.html
https://www.mikrocontroller.net/attachment/235150/Instruction_Card_Z80.pdf
https://www.zilog.com/docs/z80/um0080.pdf
https://www.heinpragt.nl/?p=603