FW: How much memory?

[Ciciora Steve]

  My solution to your delima is to use a chip that can be configured in single
chip mode or expanded mode (8051 family, 6811, etc).  With something as
complicated as this project, don't fool yourself that you will only build one. 
If you try to limit yourself to hardware that will be the development system
and the final product, it could be so unpleasent to work with that it will
loose it's fun.  I have a development system that is 10 times as big as
necessary, 10 times as much memoy, 10 times as much power supply, etc.  I have
a 6811 in expanded mode with a 32k ram chip (I debug most of my code out of
ram, when it works, transfer it to eprom) and 32k eprom.  For power, I have a
12vdc -> 120vac power inverter (paid $69 for 200 watts) and my bench supply
consisting of lambda switchers of 5V and +/- 15V.  I also don't have a good
laptop, so I drive around w/ an old '286 on the floor plugged into the 120V
power inverter (I run from floppies; don't think that old ST-251 would take the
bumps).  Now I guess that most of you can't do this with your daily driver, and
neither can I.  I have a 'free' '72 volvo that came fuel injected stock (analog
computer).  No passenger seat, the dash is ripped out and a big breakout box
(of all the computer wires) is put in it's place.  With thermocouple wires and
sensor wires all over the place, and a computer where the passenger seat was,
it gets quite a few stairs when I bring it in to get the emmissions checked!
  Oh, ya.  If (when) I get something that I consider working enough to put into
my '66 mustang, then I'll shrink it down to a single board computer (single
chip mode If I care to).  Until then, I'm having enough trouble finding time to
write some code instead of trying to make my code as small as possible to fit
in single chip mode, and also to put up with the burn/run/crash/erase/repeat
cycle.
  - Steven Ciciora
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Hi there,

I am wondering what the general concensus out there about how much
memory would be required to house a good EFI system.

The reason I ask this is there are several options for processor choice:
8k on chip eprom
16k on chip eprom
32k on chip flash eeprom, with boot rom to download code.
 (not sure if available yet)

The main reason I want on-chip eprom is that (if) the design proves
successful, I'd like to market it to a few freinds/acquaintances, but I
don't want some @#$@#$! stealing all my hard work.

(rest deleted)