Z80/AM95 NANO COMPUTER: Expansion Card with C8231

This board:

1) Second 64K (8kx8) SRAM: CDM6264E3 (datacode 1982)

 

2) Serial RS232 Interface with 8251 USART

 

3) Memory mapped 8 bit parallel IN/OUT with LS374 latched outputs and LS244 inputs with one interrupt line

 

4) Memory mapped co-processor C8231A: 16 bit floating point arithmetic unit running @ 2.5 Mhz

Done