2K Z80 Monitor Program for Microbyte MZ80A-IO
This program is a custom 2K eprom monitor routine that runs on a Z80 cpu card in the top 2K of memory space. This particular version runs on a Microbyte MZ80A-IO cpu card. It uses several pieces of hardware on other boards in the system. The system console uses the serial port (ports 2,3) on an IMSAI MIO serial/parallel/cassette tape board. Sample serial code is also included that accesses the 2 serial ports on the MZ80A-IO CPU card. A second big section of code is used for booting CPM from a parallel port interfaced SD card disk interface. Details will be revealed on another web page that is currently under construction. This parallel port micro SD card disk is interfaced through a port on the IMSAI MIO card. A 64K ram card with the top 2K disabled is used in the system for RAM.
The hardware setup:
- The Microbyte MZ80A-IO Z80 CPU card.
- Tanner 64K static ram card.
- The IMSAI MIO serial/parallel *2/ cassette interface card.(optional)
- The optional BUSMON card for debugging and blinking lights.(optional) s100-busmon project