Help w/ EPROM emulator

[TK]

I've been bugging the guy at www.ldti.com to give me the communication
routines to his emulator (real time changes). So far nothing from him yet
although he said he would.

I was planning on integrating it into GMEPro so I could just edit the tables
in normal values and it would update the emulator automatically.

Either way, I think his is about $250 and it is real time. The problem is
that you have to work in hex and I noticed the engine will die at idle
sometimes when you change values.

When I am not looking to tune real-time, I open the editor in one window and
the emulator program is the other and make changes in the editor, save it,
and immediately load it in the eprom windows.

Terry
----- Original Message -----
From: Barry Tisdale <btisdale at cybersol.com>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Friday, December 17, 1999 6:58 AM
Subject: Help w/ EPROM emulator


> Does anybody know if there is a 'real-time' PROM emulator out there that I
> can use w/ my 7749 ECU (Syclone)?
>
> The emulator vendors I've contacted either have not replied, or not really
> answered my questions.
>
> The ECU *will* tolerate switching between PROMs while running via a
> thumbwheel switch (Todd A./Brian G. 10/1 chip).
>
> If there's no commercial unit out there that will work, I'd like to put
> together a board that will have a 16k generic 'keep-it-running' PROM,
> switchable w/ a 16k SRAM which can be loaded &/or modified thru a laptop
> parallel port.  I only want to change one byte at a time.  Normally, the
> ECU would run using the SRAM; when writing a new byte, it could switch to
> the PROM for the few ms needed to write to the SRAM, then switch back to
> the SRAM.
>
> I'd rather not reinvent the wheel, so if anybody has done such, or knows
of
> a commercial unit that will do this, I'd *really* like to know about it.
>
> Thanks - Barry
>