GM 747 EPROM

[rr]

It's never that easy. The eprom is from $D000 to $DFFF. Then there
are two ROM's on board. One from $E000 to $EFFF, and the other
from $F000 to $FFFF. 12KB of code all together.

BobR.

Jove Malcolm wrote:

> For the GM 747 EPROM, I noticed all the images are 4096bytes (32Kx8 bits).
> Does this mean the 13th address bit (most significant) is not used? If this
> is the case, is it connected to the computer, or would it be possible to
> burn two 32Kx8 images to a 64K eprom, and use a simple logic high/log on the
> A13 pin to select which image to use. I got this idea from the 6-in-1 design
> idea on the website, to give credit where it's due.
> ----------------------------
> Jove Malcolm / TheDrip
> drip at home.com
> http://www.sendon.net/~drip
> 1989 Chevy Blazer
> 1980 Pontiac Trans Am WS6
> 1960-1990 Combined pile of rust
> approximately the size of a vehicle
>
> ----------------------------------------------------------------------------

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org