HP (Hewlett-Packard) 520 5/XX Personal Computer User Manual


 
55
2 System Board - (SiS Chipset) (Part Number: D4051-63001)
Devices on the ISA Bus
Floppy Drive Controller
The Floppy Drive Controller (FDC) is software and register compatible with
the 82077AA, and 100% IBM compatible. It has an A and B drive-swapping
capability and a non-burst DMA option. The FDC supports any combination
of the following: tape drives, 3.5 inch flexible disk drives, 5.25 inch flexible
disk drives.
Keyboard and Mouse Controller
The PC has an 8042-based keyboard and mouse controller (the socket pin
layouts are as shown on page 24). The C3758A keyboard is supplied for use
with the Windows 95 operating system (though it will also work with other
operating systems). It has the following capabilities:
Space-bar power-on, to start the computer from the Off state (if
power on
from keyboard
is enabled in the Setup program).
Windows key (next to the keys), which has the same effect as
clicking the Start button on the Windows 95 task bar.
Pull-down key (next to the right key), which has the same effect
as clicking the right mouse button.