DEC M8350 - KA8E posibus interface

[Ethan Dicks]

On 6/20/05, vrs <vrs at msn.com> wrote:
> I have one :-).  About 20 11"x16.5" sheets.

Handy.

> > I'd love to see one to verify differences between the 4Kbit and
> > 16Kbit-stuffed boards.  I'd consider taking one of my 16K boards and
> > turning it into 128K (easier desoldering than by unpopulating a 32K
> > board)
> 
> Mine describes a 16Kw board (half stuffed) and a 32Kw board.

Visually, I've compared my 16K and 32K boards, and my 128K boards, and
the only difference  can spot is type and quantity of DRAM.  I'd like
to know for sure.

Also... does anyone know about the differences between 4116 and 4164
chips enough to answer the question if one could use 4164s as long as
one a) prevents the non-TTL supplies from reaching the chips (modify
board, modify sockets, modify pins...) and b) possibly tie up or tie
down the extra multiplexed address input.  Can you refresh 1/4 of a
4164 and have just that part stay refreshed?  I ask because I have a
serious wad of new 4164s from COMBOARD stock, but 128Kw of 4116s (8 x
12)  is more than I have lying around.

-ethan