30 Apr
2009
30 Apr
'09
5:51 p.m.
On Thu, Apr 30, 2009 at 6:05 PM, Chuck Guzis <cclist at sydex.com> wrote:
Converting the original IBM 5150 planar from 64K using
4116s to 256K
using 4164 was the subject of a number of kits--and magazine
articles. ?It wasn't difficult.
But wasn't that board designed to reroute/disconnect -5V and +12V to
the memory array without soldering, or was some minor re-work required
for the earliest rev 5150 motherboard?
-ethan