Bob Ammerman <PICLIST@MITVMA.MIT.EDU> wrote:

> There have been many threads on the PICLIST regarding interfacing
> external RAM to PIC's, preferably without using up every available
> pin on the PIC.
>
> Today I stumbled onto an interesting solution. I just purchased,
> from BG Micro [www.bgmicro.com], their item #LCD1015, which is a
> 128 x 32 _graphics_ LCD display (USD $8.95). This device uses two
> (Samsung?) KS0108B "RAM enabled segment drivers", each of which
> contains 512 bytes of RAM used to refresh the LCD display. This is
> actually twice the RAM needed to map to the whole display

Bob:

Similarly, Hitachi-controller alphanumeric LCDs contain 64 bytes of
"character-generator" RAM and (usually) more "data" RAM than is
needed by the display.  It's easy -- although slow -- to access that
RAM, and at least one C compiler can access it transparently, as
though it were built into the PIC.

-Andy


=== Andrew Warren - fastfwd@ix.netcom.com
=== Fast Forward Engineering - San Diego, California
=== http://www.geocities.com/SiliconValley/2499