1 May
2009
1 May
'09
2:15 a.m.
On 30 Apr 2009 at 20:51, Ethan Dicks wrote:
On Thu, Apr 30, 2009 at 6:05 PM, Chuck Guzis
<cclist at sydex.com> wrote:
It involved a bit of work with the soldering iron and Xacto knife and
some wire. One problem was that the first row of DRAM was soldered
in. Purple Computing made a little board that plugged into the DRAM
sockets that required less work (but still wire and soldering iron)
that allowed you to keep the first row of 4116s soldered in.
--Chuck
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?