Zilog Z8001 Microprocessor Board and CP/M-8000 porting
This board is designed to run CP/M-8000 released by Digital Research in 1984. It runs at 6MHz clock speed, and has 256k bytes SRAM, two serial ports, and one 8 bit IDE interface to connect CF memory card. This board has a simple memory mapping hardware in a CPLD to split I/D spaces. It makes possible to run CP/M-8000 commands, such as assembler and C compiler.
Circuit diagrams of the Z8001MB
Three PDFs shows circuit diagrams of CPU, memory, memory mapping logic and interfaces.
My had-wired borad
Boot program and machine code monitor for Z8001
The boot program runs on ATMEGA165P after resetting, and transfers a machine code monitor to the SRAM. The machine code monitor is written in assembly language, GNU AS.
CP/M-8000 BIOS for Z8001MB
The original CP/M-8000 BIOS was written in C language. But it makes hard to implement BIOS on other machines without running CP/M-8000. So, I wrote a BIOS with GNU assembler under Linux, converted the CP/M-8000 object file and libraries to COFF object format, and linked them with GNU linker. It makes easy to buid CP/M-8000 system.
Running CP/M-8000
01 Aug 2022 : FPU emulation is linked to CP/M-8000 BIOS
04 Aug 2022 : Add devpack.zip in cpm8k/diska. This file contains developping tools from Digital Research.
13 Aug 2022 : Remove devpack.zip, and move files contained in devpack.zip into packages directory.