This simulation is for Jonathon Nock's home-built Z80 computer.

https://bitbucket.org/nockieboy/z80_minicomp/overview

The simulation is written in JAVA and provides an optional GUI for
debugging purposes. By default, no GUI is created.  The option "gui"
may be added to the JAVA command to enable the GUI, for example:

	java -jar VirtualZ80MiniComp.jar gui

This simple implementation uses stdio for the system console.  In order
to faciliate accurate representation, most host systems will require
changing the user's TTY settings to disable ECHO and to use unbuffered
mode (so that each character is transmitted immediately, instead of all
after ENTER is pressed). See the Linux shell script "run" for an example.
In addition, Ctrl-C will terminate the JAVA program so in order to send
a Ctrl-C to the Z80 computer you need to press Ctrl-A, which will be
translated to Ctrl-C when sent to the Z80. Likewise, ENTER is translated
to Carriage Return and BACKSPACE (ASCII DEL) is translated to Ctrl-H (BS).

The file "CF" is my current CompactFlash card image I am using.  This is
for a 64M CF card - the maximum that current software can use. This image
may be accessed outside the simulation using "cpmtools" (available from
far too many locations...). The file "diskdefs" provides the format data
needed by cpmtools to access each of the 8 partitions on the CF image.
The formats are name "cfa" through "cfg" (for drives A: thru G:).

The CF card currently contains:

	Boot tracks: CP/M 2.2 image (CBIOS64, BDOS, CCP)

	Drive A: some CP/M 2.2 utilities and other files, and
		Magic Wand EDIT.COM for xterm/vt100 terminal emulators.
		Also includes CPMLDR.COM, CCP.COM, and CPM3.SYS for
		starting CP/M 3.

	Drive B: contains CP/M 3 utilities and system generation
		files.	In general, make drive B: the current drive
		after loading CP/M 3.

	Drive C: unused - setup for Update and Access timestamp (CP/M 3)

	Drive D: PL/I compile environment

	Drive E: PL/M setup (under ISIS) - not fully working

	Drive F: unused

	Drive G: unused

Note: All BIOS source code is in Z80 assembly language and cannot be
built using native CP/M tools.

cpmtools example:

$ cpmls -f cfc -F CF
Directory For Drive A:  User  0

    Name     Bytes   Recs   Attributes   Prot      Update          Access
------------ ------ ------ ------------ ------ --------------  --------------

CPM3     SYS    24k    174              None   01/19/18 09:13  01/25/18 16:50

Total Bytes     =     22k  Total Records =     174  Files Found =    1
Total 1k Blocks =     24   Used/Max Dir Entries For Drive A:  130/ 512
$

(note, cpmtools doesn't know the true drive letter, so always says "A:")

NOTE: cpmtools will not consider a drive as CP/M 3 format unless the
diskdef contains the "os 3" clause.