28 Apr
2006
28 Apr
'06
6:55 p.m.
I'm lazy
tonight. Are there any pin compatible replacments for this chip?
It is the SD floppy controller on my TRS-80 EI. It is very sick...
Any sources for 1771 anywhere. I see lots of 197x available.
WD1771's weren't uncommon, so you might still be able to locate a pull.
But it is a 30-year old chip...
Alternatively, a WD1791/1792/1795 is very close in pinout and command set
compatibility and probably could be made to work with a little tweaking.