green b motherboard memory upgrade

green b motherboard memory upgrade
iZ SUPPORT TECHNICAL MEMO
GREEN B
MOTHERBOARD MEMORY UPGRADE
__________
RADAR MEMORY USAGE
The standard RADAR systems shipped with 4 MB of memory on the motherboard. This memory is used
to store both the operating system as well as the data for the file system and data for the playlists of the
current project. The operating system takes about 1.5 MB, and the file system takes about 1.2 MB (about
0.4 MB per disk drive), leaving about 1.3 MB for playlist data.
WHY INSTALL MORE MEMORY?
More may need memory in RADAR to use more than 3 drives at a time or if editing a complicated project
and receive an OUT OF MEMORY message.
WHAT TYPE OF MEMORY CAN BE INSTALLED?
The RADAR Green B Motherboard used 30pin 9bit (or 9chip) fastpage SIMM (Single Inline Memory
Module) technology. Most memory stores on the web will have these available. Here are the configuration
details:
Pin Count:
30-pin
Access Speed:
70 nanosecond
Memory Size:
1 MB x 9 bit SIMM
4 MB x 9 bit SIMM
16 MB x 9 bit SIMM
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iZ SUPPORT TECHNICAL MEMO
WHAT ARE THE POSSIBLE MEMORY CONFIGURATIONS?
SIMMs are installed in banks of 4, and there are sockets for two memory banks on the motherboard. So
the possible configurations are:
Bank-0
Bank-1
Total Memory
4x1MB (standard)
- (standard)
4MB (standard)
4x1MB
4x1MB
8MB
4x1MB
4x4MB
20MB
4x1MB
4x16MB
68MB
4x4MB
-
16MB
4x4MB
4x1MB
20MB
4x4MB
4x4MB
32MB
4x4MB
4x16MB
80MB
4x16MB
-
64MB
4x16MB
4x1MB
68MB
4x16MB
4x4MB
80MB
4x16MB
4x16MB
128MB
EARLY RADAR SYSTEM LIMITATIONS
The earliest RADAR systems (the first 20 or so) used an older-style motherboard with "U4VL2" printed on
the board, and a blue plastic socket for the 486 chip. These early systems can only accommodate 1 MB x
9 and 4 MB x 9 SIMMs. They are therefore limited to 32 MB total memory. This 32 MB limit is still more
than adequate for RADAR's needs.
TO INSTALL EXTRA MEMORY, FOLLOW THESE STEPS:
Power off RADAR.
Remove the case lid.
Locate the empty memory bank (Bank-1) on the motherboard. The two banks are located nearest
the power supply and the SCSI disk drives.
Remove any cables in the way of Bank-1. It is only nessessary only need to disconnect the cable
connecting the SCSI drives to the CM24.
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iZ SUPPORT TECHNICAL MEMO
Install the extra SIMMs into Bank-1. The new SIMMs should face the same direction as those
currently installed. Start with the socket closest to Bank-0. Insert each SIMM into its socket by:
• sliding the bottom SIMM edge into the socket at an angle, so that the top edge can pivot
freely and
• rotate the SIMM until it is completely vertical and the top edge snaps into the holes and the
metal clasps lock the SIMM in place.
Reattach any cables removed in step 4.
Install a VGA card (if not already present), VGA monitor, and a PC keyboard. Any VGA card
will do, and it can be installed in the empty motherboard slot next to the MF3. The PC keyboard
attaches on the back panel of RADAR.
Power on RADAR. The VGA monitor will display the normal PC boot sequence. It should show
that the new RAM was installed correctly as it tests all available memory. It will stop with a
MEMORY MISMATCH or BAD MEMORY SIZE message. This message is expected and does
not indicate an error. (The message is stupid, misleading, and unnecessary, but unfortunately it
will appear. ARGH!)
After the mismatch message press
to enter the BIOS SETUP screen.
From the main BIOS SETUP menu, select STANDARD CMOS SETUP and press
Don't change anything here. Just press
.
to get back to the MAIN menu.
From the main BIOS SETUP menu, press
to SAVE & EXIT. Press
to confirm the save
operation. This operation will record the new memory size into the battery-backed configuration
memory.
The RADAR system will now reboot. This time, no mismatch message will occur and the RADAR
system should now boot off the SCSI drives.
From the RADAR DIAGNOSTICS MENU select SHOW FREE RAM. Verify that the new RAM
has been recognized by the RADAR operating system. If upgrading from 4 MB to 8 MB, the
system should now be reporting more the 4 MB of free ram (it will probably report around 5000
KB free).
Power off RADAR.
Remove the VGA card (only if it wasn’t previously installed) and keyboard.
Close the case lid.
Power on RADAR.
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