NorthStar HORIZON Manual page 49

F12. Install all 47 IC's in the locations indicated On the layout
legend, being careful to use the correct orientation. All
the IC's should be oriented the same way, with pin 1 toward
the bottom. Be Sure all the IC pins are in the socket holes
and not bent under the IC and not outside the socket.
The three PROM's can be identified as follows:
Layout Name
DWE
DSEL
DPG~l
Location
4C
llC
9D
PROM Type
6301
6301
6309
PROM Label
DWE-y
DSEL-xx-y
DPGM-xx-y
xx=two high order HEX digits of PROM origin
y =version number
The labels on the PROM's for the standard version #1 are
DWE-l, DSEL-E8-1, and DPGM-EB-l.
FI::. Install the jumper "G" below location 5D by soldering with a
piece of resistor snipping.
The disk controller board is now completely assembled. Proceed
to the checkout section.
4"
North Star HORIZON Computer