ZAX Z-80 Emulator

[P E Schoen]

I have a ZAX Z-80 emulator that I got over 25 years ago when the company I
worked for was getting rid of assets no longer needed, and I used it a
couple of times for a product that had been designed with Z80 processors. I
have not used it for about that long and I don't know if it still works or
has succumbed to dust and humidity. I'm sure the floppy disks with the
software are pretty hopeless after my recent experiences. But I found some
of the files that I had copied to hard drives, and I may even have the
software on some really old drives. I don't think I will ever use this
emulator and I'd like to find a good home for it. I know some of you design
and/or service vintage equipment that may use Z80s, so I'll give you first
dibs before I put it on eBay. If I do, what do you think it might sell for?

Here is a sample of the command set, and I think you can just use an RS232
terminal for communication:

ZAX.DOC --- 6/17/94 --- PES

*********************** ZAX EMULATOR COMMANDS
*******************************

Annnn Assemble Z80 code at Hex location nnnn

B Shows breakpoints?
E(OFF)
T(ON)
S(DI)
W(ON)

D[mmmm],[nnnn] Display memory from Hex location mmmm to nnnn

Ennnn Edit memory at Hex location nnnn
Use / to exit

Fmmmm,nnnn,dd Fill memory from mmmm to nnnn with data dd

G[mmmm],[nnnn] Go to location mmmm, break at nnnn

H Clock Counter = nnnnnnnn
Storage Mode = EM
Storage Size = mmm/nnn

HMnnnn Display history buffer for nnnn machine cycles

HDnnnn Display history buffer for nnnn instructions

In Set In-circuit mode n [0,1,2]
0 (US=>RW)
1
2 (RW,RO=>US)

L filename.hex Load Intel Hex filename

MA Display memory map

MAmmmm,nnnn=dd Map memory from mmmm to nnnn:
RO=Read Only
RW=Read/Write
US=User

Mmmmm,nnnn,dddd Move memory between mmmm and nnnn to dddd

N Next Instruction (Trace)

Pmm[=nn] Read port mm [output data nn]
Exit with /

Q Quit (Does not work in Local/Terminal Mode)

R Register display

Smmmm,nnnn,dd Search from mmmm to nnnn for data dd

T[R] Trace status

U NMI=DIS Disable NMI (Does not work in Remote Mode)

V ? Needs Filename

========================================================

Other files I found are:
ASMZ80.EXE 7/23/1984 103K
VDTE.EXE 12/31/1982 26K
ZAXE2H.COM 1/1/1980 4K
ZAXICE.COM 1/1/1980 7K

Thanks,

Paul

 

[Nobody]

There is a Z80 emulator for the MS operating system.
Probably also for Linux.

A hardware emulator can be plugged into the CPU socket of a physical
circuit. Software emulators don't generally provide this functionality.

 

[P E Schoen]

"Jan Panteltje" wrote in message

On a sunny day (Sat, 02 Mar 2013 09:43:31 +1000) it happened "David
Eather"

Yes, I have it, and there is also a program that can read old KayproII
disk
format on the PC, think it is called 22disk or something like that.
Single sided, 5 1/4 inch, 8 sectors per track, 40 tracks

I also have 22disk:

The following disk types are supported by the registered version of 22DISK:
===========================================================================
Generic CP/M - SSSD 8"
ABC-80 - SSDD 48 tpi 5.25"
A. B. Dick Magna III - DSDD 48 tpi 5.25"
Actrix (Access Matrix) - SSDD 48 tpi 5.25"
Actrix (Access Matrix) - DSDD 48 tpi 5.25"
Adler Textriter - SSDD 48 tpi 5.25"
Advanced Digital Super 6 - SSDD 48 tpi 5.25"
.....
Zenith Z-100 - SSDD 8"
Zenith Z-37 Disk - DSDD 96 (Half drive) 5.25"
Zenith/Heath H-89 Extended Density - DSDD 48 tpi 5.25"
Zenith Z-100, Heath H-47 Extended Density - DSDD 8"
Zenith Z-100, Heath H-47 - DSDD 8"
Zorba - DSDD 48 tpi 5.25"
Zorba - DSDD 96 tpi 5.25"

And also 22nice:

22NICE
A New Insystem CP/M Emulator
Version 1.3, July, 1990

22Nice is a Z80/8080 CP/M 2.2 emulator for use on PC-compatible
computers. The 22Nice CP/M Emulation package offers the follow-
ing features:

* Emulate 8080/8085/Z80 processors with or without NEC
V-series chip installed. 22Nice contains an emulator
for both 8080 and Z80 processors. 22Nice also has a
test mode, which allows identification of the ap-
propriate processor needed for emulation.

* Provides terminal emulation for most common CP/M
machines with terminal types for Osborne, Kaypro,
Heath/Zenith, Morrow, Actrix, DEC VT-100/VT-52,
Televideo 925/950 and LSI ADM-3A.

* Supports CP/M user number to DOS sub-directory transla-
tion.

* Allows use of DOS "pipes" and utilities with CP/M
programs.

* Supports a complete set of BDOS and BIOS function inter-
faces, including direct disk read/write.

* CP/M programs are fully integrated into the DOS environ-
ment; the user is unaware that a program is CP/M- or
DOS-based.

Previously I had used a "Baby Blue" ISA card which contained a Z80 and ran
CP/M on a hardware platform. I needed that for the CP/M programs M80
(Macroassembler) and L80 (Linker) used for my Z80 project. Fortunately I had
copied these files from the 5-1/4 disks to a hard drive before they went
bad. I doubt I'll ever use them, but it's good to know I have them. There
are still some of these units (PLC-2000) in the field. But we now offer a
complete retrofit package that gets rid of the old hardware (ca1986) and
replaces it with somewhat newer hardware which still uses a Z180 in a ZWorld
"Smart Core" module (ca 1994). Some of the history of this project is on my
website: www.pstech-inc.com

Paul

 

[Jasen Betts]

If you want a Z80 system, perhaps look for those old Sinclair (Timex) boxes, spectrum, ZX80, ZX81.
Wrote a CPM clone too...

There is a Z80 emulator for the MS operating system.
Probably also for Linux.

Several. at-least one for CP/M, several for Sinclair, a couple for gameboy.
and qemu which is generic

But Paul's emulator is a hardware in-circuit emulator.