EPROM emulator

[steve ravet]

> Personally, I lean towards making both memory banks EEPROMs - such as
> the AM29F010. And using some buffers and the pic to control them. Do we
> need additional circuitry for the serial to parallel conversion? ;) What
> supplies the address lines to the "off line" bank of memory, so we can
> write to it?

Did you mean flash instead of eeprom?  29f010 is a flash part.  Flash
parts can only be erased in sectors, which means you'd have to download
16K chunks at a time  At 9600 baud it would take about 17 seconds to
download 16k.  Having a RAM means faster updates.

PICs have a serial port built in, and up to 5 I/O ports (8 bits).  The
PIC alone can handle reading from the serial port and writing to the
RAM.

I have attached to this email a .jpg of the OE circuit I talked about
earlier.  It's 10k in size...

--steve

> 
> Just some thoughts... Random as they may seem... I realize that several
> here already have designs in mind, but I work best by stealing others'
> ideas and putting them through my own twisted improvements... ;)
> 
> -Andrew

-- 
Steve Ravet
steve.ravet at arm.com
Advanced Risc Machines, Inc.
www.arm.com
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