29 Aug
2005
29 Aug
'05
2:25 p.m.
Hi all,
I am looking into the possibility to add a floppy disk interface
to the 6809 Core Board. 20 years ago, so this is OT :-) , I built
a floppy disk interface for my 6800 system using the 1793.
I have ordered some 1793 from BG Micro, but checking the data
sheet of the 1793, I noticed taht the FDC requires +12 on pin #40.
I know the MB8877 is pin-compatible with the 1793, but does *not*
need the +12V.
I failed to locate a seller for the 8877, but I do not know "all"
major part sellers in the US. JameCo, BG Micro and DigiKey do not
have this part ... somebody knows a good stock of the 8877 ?
I can use the 1793, +12V is "ugly", but the voltage is present as
the +12V is needed for the floppy drive itself!
thanks,
- Henk, PA8PDP.