Table of Contents
Advertisement
Medalist 1270 Product Manual, August 1995
19
2.4 The options jumper block (J8)
The options jumper block (J8), shown in Figure 3 on page 20, is used to
configure the drive for operation. It is a 12-pin dual header and uses
0.1-inch connectors and jumpers. The options jumper block is used to:
• Configure the drive for single-drive operation
• Configure the drive as master or slave
• Configure the drive for dual-drive emulation
• Configure the drive for cable select
• Install a remote LED
The jumper settings for these options are shown in Figure 4 on page 21.
Use 0.1-inch connectors to configure the options jumper block. The drive
is shipped with spare jumpers attached to pins 7 and 5 and pins 3 and 1
of the options jumper block. Use these jumpers to configure the drive.
Caution. If you try to install a jumper that is not the correct size, you may
damage the jumper and the jumper-block pins.
2.4.1 Master/slave configuration
Use the following settings to configure the drive as master or slave.
One drive only. The drive is configured at the factory for single-drive
operation. No jumpers are required for single-drive operation.
Drive as master. Place a jumper on pins 3 and 4.
Drive as slave. Place a jumper on pins 1 and 2.
2.4.2 Dual-Drive emulation
To configure the drive for dual-drive emulation, place a jumper on pins 5
and 6 and on pins 11 and 12. Dual-drive emulation makes the drive look
like two logical drives to the computer. Use the translation geometry
values given for dual-drive emulation in the table on page 6 for both
drive-type settings in CMOS. These are the maximum values the BIOS
can accept if it cannot recognize more than 528 Mbytes. Partition and
format both logical drives.
If you use dual-drive emulation, you cannot connect a second, physical
drive to the same I/O port. Dual-drive emulation does not support
cable-select. Also, the drive responds as one drive to power-manage-
ment commands.
Advertisement
Table of Contents
