DPM SP SIMM INSTALLATION
The standard SP comes with 1 megaword (2 megabytes) of RAM
in the form of a pair of 1 meg x 8 SIMMs (single in-line memory
modules). These are 30 pin Macintosh SIMMs. They are not the
same as the IBM 1 meg x 9 SIMMs or the Macintosh IIfx types.
Upgrading the memory in your SP is as easy as buying and installing
more of these 30 pin Mac SIMMs. The SIMMs must be 100 nanosecond
(nsec) or faster and must be added in matched pairs of the
same size. (But not necessarily the same speed. See the following
section for more information.)
The SP has four pairs of SIMM sockets, thus a stock SP can
accept up to three additional pairs of 1 meg SIMMs. A pair
of jumpers near the SIMM sockets can be switched to set up
the SP to use 4 meg x 8 SIMMs instead of the 1 meg x 8 SIMMs.
When power is turned on, the SP automatically checks the amount
of memory installed. With versions of the SP software older
than version 1.3, the 1 meg SIMMs which came with the unit
could not be used in combination with 4 meg SIMMs. With SP
version 1.3 and later, it is possible to combine the two SIMM
sizes, so if you buy fewer than four pairs of 4 meg SIMMs,
you can still use 1 meg SIMMs to fill some empty sockets. You
cannot, however, use three 1 meg pairs with one 4 meg pair.
Adding Memory:The Guidelines
All SIMM types: As previously mentioned, SIMMs must be 1 meg
x 8 or 4 meg x 8 (30 pin) Macintiosh SIMMs with a speed of
100 nsec or faster (e.g., 80 nsec). SIMMs must be installed
in matching pairs according to size, into paired SIMM sockets.
That is, you must use two 1 meg SIMMs or two 4 meg SIMMs in
any given pair of sockets (the speeds of the parts do not need
to be matched as long as both are 100 nsec or faster).
Note: Socket pairs are identified as sockets
that are physically attached to each other.
- After completing memory installation, it is a good idea
to check how much memory the SP thinks is installed. To
do this:
- Make sure that there are no samples loaded.
- Press the Wave button.
- Press the +/inc button.
- Press the +/inc button a second time to see the amount
of space available. This is shown in kilowords. Consult
the following table for kiloword equivalents.
- If the amount of memory shown is the same as what you
expected, great!
- Otherwise check your math and the following table to
make sure you calculated correctly.
Remember: It takes two 1 meg SIMMs to equal
1 megaword. Similarly, it takes two 4 meg SIMMs to equal 4
megawords.
SIMMs installed -total megawords -"space avail" should be:
2-1 meg.1 megaword 1024kw4-1 meg.2 megawords 2048kw6-1 meg.3
megawords 3072kw8-1 meg. or 2-4 meg.4 megawords 4096kw2-4 meg.
plus 2-1 meg.5 megawords 5120kw2-4 meg. plus 4-1 meg.6 megawords
6144kw4-4 meg.8 megawords 8192kw4-4 meg. plus 2-1 meg9 megawords
9216kw4-4 meg. plus 4-1 meg10 megawords 10240kw6-4 meg12 megawords
12288kw6-4 meg. plus 2-1 meg13 megawords 13312kw8-4 meg.16
megawords 16384kwNote: The SIMM combinations listed in the
table are the only valid combinations! Any other combinations
are invalid and may cause unpredictable results.
It is also possible to have defective SIMMs. This will also
cause the "space avail" screen to show something other than
the installed memory. Remove any defective SIMMs immediately.
It is possible to install memory in the SP in three configurations:
- 1 meg SIMMs only
- 4 meg SIMMs only
- 1 & 4 meg SIMMs combined
The following three sections discuss the specific rules for
each configuration.
Note: In each configuration it may be necessary
to change the position of the jumpered connectors labeled P1001
and P1002.
Using 1 meg SIMMs
When using only 1 meg SIMMs it is necessary for the jumpered
connectors labeled P1001 and P1002 to have the jumpers located
toward the rear of the SP. This is position that the jumpers
are in when shipped from the factory.
If you have a total of two pairs of 1 meg SIMMs: If you are
installing one pair of SIMMs to a factory "stock" unit, just
place the SIMMs you are installing in the socket pair next
to the SIMMs already there. Otherwise you need to install the
SIMMs in either the two left-most socket pairs, the two right-most
socket pairs, or the two outer socket pairs (this would leave
the two middle socket pairs empty).
If you have a total of three pairs of 1 meg SIMMs: It is necessary
for you to install the SIMMs so that either one of the middle
socket pairs is empty. The SP will not see memory if it is
installed in any other configurations!
If you have a total of four pairs of 1 meg SIMMs: Just install
them in all of the socket pairs!
Using 4 meg SIMMs
When using 4 meg SIMMs it is necessary for the jumpered connectors
labeled P1001 and P1002 to have the jumpers located toward
the front of the SP. This is opposite from the position the
jumpers are shipped in from the factory.
If you have a total of two pairs of 4 meg SIMMs: These need
to be installed in consecutive socket pairs. It doesn't matter
which consecutive socket pairs as long as they are kept together.
If you have a total of three pairs of 4 meg SIMMs: Install
these so that either the left-most or right-most socket pair
is empty. The SP will not see memory if it is installed in
any other configurations!
If you have a total of four pairs of 4 meg SIMMs: Just install
them in all of the socket pairs!
Combining 1 & 4 meg SIMMs
When combining 1 & 4 meg SIMMs, it is necessary for you to
be using software (ROM) version 1.3 or higher and it is necessary
for the jumpered connectors labeled P1001 and P1002 to have
the jumpers located toward the front of the SP. This is opposite
from the position the jumpers are shipped in from the factory.
If you are using one pair of 1 meg SIMMs and one, two, or three
pairs of 4 meg SIMMs: Place your 4 meg SIMM pairs into any
adjacent socket pairs and place the 1 meg SIMMs in the socket
pair right next to them.
If you are using two pairs of 1 meg SIMMs and one, or two pair
of 4 meg SIMMs: Place the 4 meg SIMMs into the middle socket
pairs and place the 1 meg SIMMs on either side of them. The
4 meg SIMMs must be "sandwiched" between the 1 meg SIMMs without
any gaps in socket pairs.
Improper SIMM Installation Configurations
The following SIMM installation configurations will not work
properly:·Two or more pairs of 1 meg SIMM pairs in consecutive
socket pairs (when mixed with 4 meg SIMMs).
- Pairs of 1 meg SIMMs "sandwiched" between pairs of 4
meg SIMMs.
- Three pairs of 1 meg SIMMs in combination with one pair
of 4 meg SIMMs.
- Installing SIMM Modules Installing SIMM modules is easy
if you observe the following rules:·Use the proper grounding
strap when handling any static sensitive devices. If this
is not possible, try to be in a static-free environment.
Failure to do this could result in damage to the SP's circuit
board.
- Make sure the SP's power cord is disconnected.
- Work in a well lighted area.
- Read and understand the previous section on SIMM pairing.
- When looking at the SP from the front, the SIMM modules
will lay to the right when installed. It is therefore best
to install SIMM modules from right to left.
- Note: Installing SIMM modules is much
easier than removing them. Have a plan in mind before you
begin.
- To install SIMM modules: Start at the right-most socket
pair that you plan to use.
- Hold the SIMM module so that the ICs are on the left
side of the circuit board. Carefully insert the gold fingered
edge connector straight (vertically) down into the socket.
- When you feel the SIMM is properly positioned, gently
push the SIMM down and to the right (you are trying to
make it "lay down") until it snaps into place. The socket
grips located on the sides of the SIMM sockets will hold
the SIMM in place.
- Repeat steps 1 through 4 until all the SIMMs are in place.
- When you have finished installing your SIMMs, use the
procedure discussed earlier to view the "space available." Make
sure it matches the amount of memory you have installed.
Removing SIMM Modules
Use the rules listed above for installing SIMM modules. Then:·Gently
release the socket grips one at time. This might be best accomplished
with a small flat blade screwdriver .Note: The socket grips
will either be plastic (like the socket) or metal. In either
case it is easy to break the grips if too much pressure is
applied. If you break the grips, the SIMM module will not be
properly held when installed. It is recommended that you avoid
breaking the grips!
Push the SIMM module up and to the left (the goal here is to
make it vertical). Remove the SIMM module by pulling it straight
up.
Automatic booting from SCSI
It is now possible for the SP to autoboot from SCSI when your
system is turned on. It is necessary for a Peavey Authorized
Service Center to perform all internal modifications to the
DPM SP. To set-up the SP to autoboot from SCSI, it is necessary
to add a jumper shorting the fourth row of pins on header HDR201.
Note: You may have more jumpers depending
on your SCSI ID. For more information on SCSI ID numbers see
section 9.2 of your DPM SP's User's Guide.
Remember: All internal modifications to the DPM SP must be
performed by a Peavey Authorized Service Center!
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