![]() I wonder if the community has encountered this and has better understanding of the problem and possible solution. I'm running into a rather strange problem with Z280 operating in Z80-compatible mode. SERIAL PORT EPROM PROGRAMMER SERIALIn mode 2, the design is software compatible to ZZ80CF, so I'm able to boot it up with a serial port, load the monitor, then load the CP/M BIOS/BDOS/CCP and run CP/M. It also has two RC2014 expansion slots.ġ) Normal mode, booting out of the EPROM, copy program into RAM and run in RAM Ģ) EPROM programmer mode, bootstrap out of the serial port, load program into RAM to program the EPROM. It has a CF flash interface ready for CP/M. SERIAL PORT EPROM PROGRAMMER PCThis is a 102mmX102mm through-hole pc board with Z280 operates in 12MHz Z80-compatible mode. In fact, it can serve as an EPROM programmer for future projects. This is ZZ80MB, a Z80 SBC that can be built by beginner and does not require an EPROM programmer. I have not forgotten about this project and have even designed a board but didn't get around to build it until today. ![]()
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