Re: Micro SCI disk controller, mystery solved

[Wayne Stewart <waynes@telus.dotnet>]

Ethereal wrote:

> If the chip is made by National Semiconconductor then it's a good 
> possibility that it's a PROM chip.  NS used to make some low density PROMs 
> with 74LS and 74S prefixes (e.g. 74LS471, 74S287, 74S573, etc.)

Unfortunately there's no manufacturers name on the top of the chip.
I'm tempted to pull the chip and try a 74LS125 but it's a pain when
you don't want to risk damage to either the chip or board.

Wayne