Octagon PC-500, User Manual

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7-3
PC-500 user’s manual Console devices
Keyboard
You can use any of the console options mentioned in the Selecting console
devices section with a local keyboard.
Speaker
You can also use a local speaker with any of the console options listed
above in the Selecting console devices section. Interface the speaker via a
4-pin connector at J4. You may use any external speaker from 8-50 ohms.
Mouse
You can also add the use of a mouse to the list of serial console devices
mentioned in the Selecting console devices section in this chapter. The
mouse connects to J3 on the PC-500.
Note See the Accessories appendix for mating information on the keyboard,
speaker, and mouse connectors.
≡
Enabling/disabling the video BIOS
The BIOS checks for a video BIOS to determine which console device to
use. If a console device exists, the BIOS will use the console device, the
CRT, or the flat panel. When the console device does not exist, the BIOS
will otherwise use a serial console, if it has not been disabled in SETUP.
To enable/disable the video BIOS area, either change W2[1-2]/W4[1-2] or
run SETUP and change C0000h-C7FFFh or C8000h-CFFFFh ROM
enable options. The jumpers work as a toggle for the SETUP options.
That is, if the SETUP previously shows the BIOS regions as “enabled,”
then changing the state of W2[1-2]/W4[1-2] will disable the regions.
To verify the SETUP program’s state for the C0000h-CFFFFH regions,
remove the USESETUP W2[9-10] and install W2[1-2] and W4[1-2]. This
jumper installation enables the video BIOS areas. To allow for serial
console use, disable the video BIOS areas by removing W2[9-10] and
W2[1-2]/W4[1-2]. See Table 7-1 and Figure 7-3 as reference guides for
disabling and enabling the video BIOS and changing ROM enable.