THE NEWS

This last month, two prototypes were made. A circuit compatible with the 16550 UART and a self-saved 16 x 6116 SRAM circuit :

The 16550 compatible UART is partially tested. Its usb interface is fully functional. This '16550' offers two identical serial interfaces. One of them can be used in TTL or with a RS232C level converters as usual, the other is directly connected to the on board USB interface. It would be easier to communicate to vintage computer with this solution, as with my hold Z80 N8VEM board : 

On my N8VEM I haven't yet the 1,8432MHz oscillator, as in this picture.

The 16 x 6116 equivalent self-saved SRAM is tested. It's basically the same system as my previous self-saved 6116 solution : 

the hold version.

BUT, now it's possible to select ALL the sixteen 2Kb space. I work on an easy-to-use bank selector...