Hi.
You may be interested in one of my web pages.
Here it shows how to build a CP/M computer using 9 ICs.
The drives are held on a Compact Flash disk, 8 drives on a 64M card, or 16 drives on a 128M card.
64K RAM and a 16K shadow boot/BASIC rom is on-board.
Cold and Warm reset switches included, and two high-speed serial ports.
I have written the BIOS myself, along with the formatter, putsys, boot monitor ROM and file transfer programs.
The ROM also contains BASIC to allow programming without CP/M.
I built this several years ago (2007/8) and is still working with no problems.
http://home.micros.users.btopenworld.com/cpm/index.htm
I put a lot of work into designing the hardware and software - please feel free to use
There is also a PC keyboard interface and 80 column display driver for it, but I haven't published details for that yet, but you can see pics of it on the page. This uses only 3 IC's - 2 ATMEL processors and a bit-shift IC. It connects to one of the serial ports and is, effectively, an ANSI-compatible serial terminal.
Other stuff, please see my home page
http://home.micros.users.btopenworld.com
Regards.
Grant.
You may be interested in one of my web pages.
Here it shows how to build a CP/M computer using 9 ICs.
The drives are held on a Compact Flash disk, 8 drives on a 64M card, or 16 drives on a 128M card.
64K RAM and a 16K shadow boot/BASIC rom is on-board.
Cold and Warm reset switches included, and two high-speed serial ports.
I have written the BIOS myself, along with the formatter, putsys, boot monitor ROM and file transfer programs.
The ROM also contains BASIC to allow programming without CP/M.
I built this several years ago (2007/8) and is still working with no problems.
http://home.micros.users.btopenworld.com/cpm/index.htm
I put a lot of work into designing the hardware and software - please feel free to use
There is also a PC keyboard interface and 80 column display driver for it, but I haven't published details for that yet, but you can see pics of it on the page. This uses only 3 IC's - 2 ATMEL processors and a bit-shift IC. It connects to one of the serial ports and is, effectively, an ANSI-compatible serial terminal.
Other stuff, please see my home page
http://home.micros.users.btopenworld.com
Regards.
Grant.