Table of Contents
Advertisement
-PROM OPTION IASSEMBLY AND CHECKOUT
-Before assembl ing the PROM 0iption, the rest of the ZPB should be
completely assembled and
che~ked-out.
-Insert and solder the
214~Pin
IC socket at location 4E with
the correct orientation.
I
-Insert and solder the
t~ree
l4-pin IC sockets with correct
orientation.
.
-:Enab1
7
the PROM option tPy cutting the "PER trace between
locatIons 3G and 4G.
I
-Insert and solder the rf' sistor network RN3 at location 4b so
that pin 1 (or the beve ed corner) corresponds to the dot.on
the layout legend.
-
-
-Insert and solder R4
(3~9K,
orange-white-red) at location 3E
and R10 (lK, brown-blak~red) at location SC.
PS. -Insert and solder the +12 volt regulator (marked "7SL12") at
location Ql (near location SB).
Also insert and solder the
-5 volt regulator
(mark~d
"79L05") at location Q2 (near
location SB).
The regutators should be oriented so that the
flat sides of the parts face the direction indicated on the
layout legend.
-Insert and solder the
f~lur
2.2uf tantalum capacitors (C25,
C26, C27, and C2S) at 1 cation SB oriented so ·that the leads
marked with a "+" corre pond to the holes marked with a "+"
on the layout legend.
.
-Using the l4-pin DIP header and some lead snippings
construct a header to
d~termine
the PROM location in memory.
Refer to the Configuration section (step J8) for details.
Plug the completed
head~r
into location 5E with correct
orientation.
. •
~
. ...
,
'
...
,,'
20
-North Star ZIS0A PROCESSOR BOARD
Insert the 3 integrated Icircuits as indicated on the layout
legend with correct
ori~ntation.
When inserting the PROM
observe the MOS device handling precautions given in the
Assembly Information seqtion.
The PROM option can
nOW~'be
checked out by reading the
contents of the PROM us'ng a monitor program or control
panel.
Note, however,
hat control panels which display the
DI bus (e.g., Altair) w'll not display the PROM contents.
P10.
Advertisement
Table of Contents
