More Apple II fun - 4116s...
cclist at sydex.com
Thu Apr 30 21:15:46 CDT 2009
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:
> > 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?
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.
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