Posts: 27
Threads: 4
Joined: Jan 1970
Simply put, a Zeprom is an EPROM in an HP-41 module case
that to the HP-41 looks exactly like a 16K module (two
bank-switched 8k modules), but can be erased as a normal
EPROM (little glass window in the module) and programmed
using the Zengrange voltage-convertor attachment directly
in the HP-41 (or using the Zeprom programmer I have). It
was made by Zengrange, so yes, Zeprom is a trade-name.
It is not trivial to interface a standard EPROM to the
HP-41's weirdo 56-bit serial bus, so there's a fair amount
of drive-electronics in a Zeprom in addition to the EPROM.
They are ideal if you want to try out machine-language
programming for the HP-41 and actually want to use the
programs in the field where a psuedo-ROM box might not be
so convenient.
grant..