Octagon PC-500, User Manual

Page: 82 / 233

8-1
PC-500 user’s manual SSDs, DRAM, and battery backup
Chapter 8:
SSDs, DRAM, and battery backup
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Description
Before you can save and boot your application from the PC-500, you must
first configure the system for your particular application requirements.
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SSD0 (optional)
SSD0 is an optional feature and is not installed on the standard version of
the PC-500.
WARNING!
Incorrect installation of SSD0 will destroy the chip. To install
SSD0, be sure to match the notch in the SSD0 chip with the
notch in the SSD0 marked silkscreen on the PC-500.
A flash, SRAM, or EPROM device may be installed on the PC-500.
Jumper blocks W2[7,8] and W5 must be set appropriately. See Table 8-1
for settings.
Selecting SSD0 device type
Table 8-1 SSD0 device selection jumpers: W5, W2[7-8]
Pins Description
W5[1–3, 2–4, 5–7, 8–10] W2[7–8] SRAM with battery backup*
W5[1–2, 3–4, 5–6, 9–10] W2[7–8] Flash
W5[1–2, 3–4, 5–6, 9–10] EPROM**
* = default, pins jumpered
** = W2[7–8] is not jumpered
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SSD0 replaced with an SRAM device
Before replacing SSD0 with an SRAM device, do the following steps:
1. Power off the PC-500 and then make sure to jumper W2[5-6] is jumpered
in order to boot from the BIOS on SSD1.
2. Since SSD0 is to be replaced with an unprogrammed device, the PC-500
must be configured to boot from SSD1. Run SETSSD.EXE to change the
boot device:
PC500 C:\> SETSSD SSD1 SSD0