Help w/ EPROM emulator

[Eric Aos]

Two limitations I remember from looking at this one before... 64 to
512K, and it requires the whole PROM Image to be redownloaded each time.
can't just twiddle a bit, and update the EPROM while the car is running.

Here's another one that looked interesting.
http://www.concentric.net/~Sanjaya/svt/smartROM.shtml

or...
http://www.hut.fi/~iisakkil/stuff.html
It had the advantage of you specifying the address you wanted to write,
so you could rewrite just one byte at a time.

or.. one for 64K chips, this one seemed more complicated than it needed
to be.
http://www.dontronics.com/emuprom.html

> -----Original Message-----
> From: owner-gmecm at esl.eng.ohio-state.edu
> [mailto:owner-gmecm at esl.eng.ohio-state.edu]On Behalf Of Mike Rolica
> Sent: Friday, December 17, 1999 8:59 AM
> To: 'gmecm at efi332.eng.ohio-state.edu'
> Subject: RE: Help w/ EPROM emulator
> 
> 
> 
> Mike Rolica
> Meridian Magnesium Products
> Strathroy, Ont 
> Ext. 260
> 
> 
> 	-----Original Message-----
> 	From:	Eric Aos [SMTP:EOA at spartek.com]
> 	Sent:	Friday, December 17, 1999 11:53 AM
> 	To:	'gmecm at efi332.eng.ohio-state.edu'
> 	Subject:	RE: Help w/ EPROM emulator
> 
> 	Check the Archives. Right after GMECM got started there 
> was a lot of
> talk about doing an emulator. The most complete plan was 
> something with a
> dualport ram chip, that could keep talking to the car while 
> it was being
> updated by the laptop. A Pic Micro or similar to manage the 
> writes, and a
> max232 to interface with the laptop. I've got one 
> breadboarded right now...
> just trying to find time to write the firmware for it.
> 
> 	 Hey check out  this site cool for diy emulators programers ect!
> 	http://electron.vintage-radio.com/Computer/computer.htm
> <http://electron.vintage-radio.com/Computer/computer.htm> 
> 
> 	
>