s100

Sujet : Date : De : Pour : hello everyone , first am 1 on the correct channel?? I have several S100 boards , found 25 years ago, kept in my cellar and forgotten....fortunately they are still in good conditions , all circuits are standard ttl (only a few proms) ,and all circuits are on sockets so all is easy to repair. I cleaned and repaired the power supply (only one capacitor exploded ) , I have the correct voltages +- 19v ,+9V on the backplane , now the power supply works . I have very few documentations only a few booklets with configuration data on some of the boards , no schematic. The maker was a french company named ADD-X ,located near Toulouse south west of France . Machines ran cpm/mpm . I have boards of several configurations : *cpu boards with Z80,64k of dynamic rams and 2708 . There are configuration switches around the eprom socket to use 2708 or 2716 . I wonder how it is possible to address more than 64K (rams+eprom)with a Z80 . I need documentation about it . On Ebay I found a Z64 board that is identical , I cannot contact the seller , I tried to get informations ... he does not accept emails. Does anyone know that Z64 ? *boards with 4 rs232+1 ppi *boards with 2 rs232+1ppi+1 fdc configurable for 8 inches or 5 inches floppys. *hdc controllers with one hard disk I also have disquettes,and backplanes . I need informations on the S100/cpm systems , how are boards addressed , it is something like qbus/unibus : fixed address for each category of board,is the console at a fixed address???etc . Since that epoch I have all the classic books from R.Zaks about microprocessors and cpm , there are very few informations on the S100 bus. I built a system with a cpu and a board with RS232 and fdc,I connected the terminal to the port labeled 'con0'(console 0??) ,nothing happened on the terminal. It may be lots of thing from a dead cpu or eprom to rs232 driver . I did not test more for today. I want to build a small system with a monitor in rom to examine/modify ram , registers just to learn Z80 . What monitor can be used ? I have what is necessary to compile and burn eproms . Thanks for your help . I have lots of questions.I can send photos to identify boards . Best regards Alain Nierveze