19 Mar
2008
19 Mar
'08
7:47 p.m.
Marden P. Marshall wrote:
I have a working Data I/O 29B with a 128K RAM module
which only had half
of the DRAM sockets populated. From looking at the schematic, it seemed
that by simply populating the remaining DRAM sockets that I would bring
the module up to the full 128K. I tried that, but the 29B still only
reports 64K of RAM. What did I miss?
I don't have the links on hand, but there's a hack to bring it up to
either 256KB or 1MB; I disremember which.
I do remember that the resistors on the memory board need to be moved
to ID the new DRAMs.
Ah, here is the old link:
http://www.leopardcats.com/dio/upgrade.htm
And I did happen to have that archived. So:
http://www.mdrconsult.com/~doc/upgrade.htm
Not mine, and I haven't had time to try it, so yer on yer own! And
if the creator of that page is on the list, I can leave it up or take it
down as you wish.
Doc