8 Jun
2001
8 Jun
'01
7:50 p.m.
It's probably not a bad idea to modify the EPROM board to accept the
single-supply (Intel-style) 2716, or even 2732. It's not difficult, and, once
that's done, you simply read the 2708's and transfer their content into
2716's
or 2732's. You can hack the voltage regulator circuit such that the two
additional regulators become pass transistors for the +5, which is the only
supply the I2716's and I2732's need.
Almost every programmer you encounter can handle these later, single supply
EPROMs.
Dick
----- Original Message -----
From: "Bob Shannon" <bshannon(a)tiac.net>
To: <classiccmp(a)classiccmp.org>
Sent: Saturday, June 09, 2001 12:16 AM
Subject: Re: IMSAI EPROMS
Joel Weder wrote:
Hi all...
I've been trying to get some action from this IMSAI for awhile now. Main
problem is I don't know what is on the EPROMs on the EconoROM board. It
looks like banks A & B, OR banks C & D, can be enabled together starting at
address 0000h. There are 6 2708's in A0 through B1, and 8 2708's in C0
through C3.
I've been looking for an EPROM burner that can read/write 2708's with no
luck so far. We have TWO machines at work, and neither will do it. Anyone
know of a burner that WILL?
Yep, I can read 'em.