26
2 System Board
Chip-Set
Super I/O Chip (
37C932
)
The Super I/O chip (FDC37C932) is contained within a 160-pin PQFP
package. The chip provides the control for the following devices.
Serial / parallel
communications ports
The two 9-pin serial ports (whose pin layouts are depicted on page 58)
support RS-232-C and are buffered by 16550 UARTs, with 16 Byte FIFOs.
They can be programmed as COM1, COM2, COM3, COM4, or disabled.
The 25-pin parallel port (also depicted on page 58) is Centronics
compatible, supporting IEEE 1284. It can be programmed as LPT1, LPT2, or
disabled. It can operate the four modes:
❒
Standard mode (PC/XT, PC/AT, and PS/2 compatible).
❒
Bidirectional mode (PC/XT, PC/AT, and PS/2 compatible).
❒
Enhanced mode (enhanced parallel port, EPP, compatible).
❒
High speed mode (MS/HP extended capabilities port, ECP, compatible).
FDC
The integrated flexible drive controller (FDC) supports any combination of
two from the following: tape drives, 3.5-inch flexible disk drives, 5.25-inch
flexible disk drives. It 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.
Keyboard and Mouse
Controller
The computer has an 8042-based keyboard and mouse controller. The
connector pin layouts are shown on page 58. The Windows 95 keyboard is
Function Logical device number
Flexible disk controller 0
Parallel port controller 3
UART1 controller 4
UART2 controller 5
RTC 6
Keyboard controller 7
Mouse controller 7
General purpose I/O (GPIO) 8
