Zilog Z80 and Compatibles Testing Software

z80type

z80type tests the Z80 CPU type. Currently it is able to distinguish between NMOS CPUs, CMOS CPUs, and U880 CPUs.

z80type runs under the CP/M or ZSDOS OSes. It uses SIO interrupt vector register as a scratch register for tests. By default the code is configured to run on RC2014* SIO module or on Small Computer Central RCBus modules, such as SC725 – RCBus Serial and Timer Module. If running on different systems, modify the SIOBC constant in the code to point to the SIO Channel B control register, and rebuild the code.

Building z80type

The code is written using CP/M ASM syntax and can be compiled as follows:

A>ASM Z80TYPE
A>LOAD Z80TYPE

Example z80type Output

Zilog Z80 - NMOS

This is the output for most Z80 NMOS processors, including:

• Zilog Z-80A CPU, date code 7935
• Zilog Z8400APS, date code 8635
• Zilog Z0840006PSC, date code 0415
• SGS Z8400AB1, date code Y28427
• Mostek MK3880N, date code 8448
• NEC D780C, date code 8401XD
• GS Z8400A PS, date code 8640
• ST Z8400AB1, date code 28923
• Sharp LH0080A, date code 048CB
• GoldStar Z8400B PS, date code 9006
• KR1858VM1, date codes 9305 and 9306

E>z80type
Z80 Processor Type Detection (C) 2024 Sergey Kiselev
Processor family: Z80
Logic family:     NMOS
Manufacturer:     Zilog or non-MME/Thesys clone

MME UB880D

This is the output for East German UB880 Z80 clones:

• MME UB880D U 6
• MME UB880D T 3
• Thesys Z80H

E>z80type
Z80 Processor Type Detection (C) 2024 Sergey Kiselev
Processor family: U880
Logic family:     NMOS
Manufacturer:     MME or Thesys

Zilog Z84C00 - CMOS

This is the output for Zilog Z84C00 and reportedly ST Z84C00 (to be verified)

E>z80type
Z80 Processor Type Detection (C) 2024 Sergey Kiselev
Processor family: Z80
Logic family:     CMOS
Manufacturer:     Zilog or SGS/ST

NEC and Toshiba CMOS Z80 clones

This is the output for NEC and Toshiba Z80 CMOS clones:

• NEC D70008AC-6, date code 8832LX703
• Toshiba TMPZ84C00AP-8, date code 9544EFI

E>z80type
Z80 Processor Type Detection (C) 2024 Sergey Kiselev
Processor family: Z80
Logic family:     CMOS
Manufacturer:     Toshiba or NEC