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**82489DX Advanced Programmable Interrupt Controller 10/12/92
***Notes:...
***Info:
1.0 INTRODUCTION
The 82489DX Advanced Programmable Interrupt Controller provides
multiprocessor interrupt management, providing both static and dynamic
symmetrical interrupt distribution across all processors.
The main function of the 82489DX is to provide interrupt management
across all processors. This dynamic interrupt distribution includes
routing of the interrupt to the lowest-priority processor. The 82489DX
works in systems with multiple I/O subsystems, where each subsystem
can have its own set of interrupts. This chip also provides
inter-processor interrupts, allowing any processor to interrupt any
processor or set of processor. Each 82489DX I/O init interrupt input
pin is individually programmable by software as either edge or level
triggered. The interrupt vector and interrupt steering information an
be specified per pin. A 32-bit wide timer is provided that can be
programmed to interrupt the local processor. the timer can be used as
a counter to provide a time base to software running on the processor,
or to generate time slice interrupts locally to that processor. the
82489DX provides 32-bit software access to its internal
registers. Since no 82489DX register read have any side effects, the
82489DX registers can be aliased to a user read-only page for fast
user access (e.g., performance monitoring timers).
The 82489DX supports a generalized naming/addressing scheme that can
be tailored by software to fit a variety of system architectures and
usage models. It also supports 8259A compatibility by becoming
virtually transparent with regard to an externally connected 8259A
style controller, making the 8259A visible to software.
***Versions:...
***Features:...
**82495DX/490DX DX CPU-Cache Chip Set <Sep91...
**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91...
**82496/491 Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**82498/493 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**
**Later chipsets (basic spec):
**440 series:...
**450NX (?) 06/29/98:...
**????? (Profusion) c:99...
**800 series...
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**5595 Pentium PCI System I/O <12/24/97
***Notes:...
***Info:...
***Versions:...
***Features:...
**950 LPC I/O <07/16/99...
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*Unresearched:...
*VIA...
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*Western Digital...
*Winbond...
**W83877F WINBOND I/O (Multi I/O) <96
***Info:
GENERAL DESCRIPTION
One of Winbond's popular series of I/O chips, the W83877F integrates a
disk drive adapter, serial port (UART), parallel port, IDE bus
interface, and game port decoder onto a single chip. The W83877F is an
enhanced version of the W83777F, with additional powerful features
such as configurable plug-and-play registers for the whole chip and
infrared support in one of the serial ports.
The disk drive adapter functions of the W83877F include a floppy disk
drive controller compatible with the industry standard 82077/765, data
separator, write pre-compensation circuit, decode logic, data rate
selection, clock generator, drive interface control logic, and
interrupt and DMA logic. The wide range of functions integrated onto
the W83877F greatly reduces the number of components required for
interfacing with floppy disk drives. The W83877F supports four 360K,
720K, 1.2M, 1.44M, or 2.88M disk drives and data transfer rates of 250
Kb/S, 300 Kb/S, 500 Kb/S, and 1 Mb/S.
The W83877F provides two high-speed serial communication ports
(UARTs), one of which supports serial Infrared communication. Each
UART includes a 16-byte send/receive FIFO, a programmable baud rate
generator, complete modem control capability, and a processor
interrupt system.
The W83877F supports one PC-compatible printer port. Additional
bidirectional I/O capability is available by hardware control or
software programming. The parallel port also supports the Enhanced
Parallel Port (EPP) and Extended Capabilities Port (ECP).
The W83877F supports two embedded hard disk drive (AT bus) interfaces
and a game port with decoded read/write output. The chip's Extension
FDD Mode and Extension 2FDD Mode allow one or two external floppy disk
drives to be connected to the computer through the printer interface
pins in notebook computer applications.
The Extension Adapter Mode of the W83877F allows pocket devices to be
installed through the printer interface pins in notebook computer
applications according to a protocol set by Winbond, but with upgraded
performance. The JOYSTICK mode allows a joystick to be connected to a
parallel port with a signal switching cable.
The configuration registers support mode selection, function enable/
disable, and power down function selection. Moreover, the conf-
igurable PnP registers are compatible with the plug-and-play feature
in Windows 95 , which makes system resource allocation more efficient
than ever.
***Versions:...
***Features:...
**W83877TF/TG/TD WINBOND I/O (Multi I/O) c97...
**W83977F/G/AF/AG WINBOND I/O (Multi I/O) c97...
**W83977TF WINBOND I/O (Multi I/O) c97...
**W83977EF WINBOND I/O (Multi I/O) <98...
**W83977ATF WINBOND I/O (Multi I/O) <98...
**
**Disk Controller:
**W83759/A/F/AF Advanced VL-IDE Disk Controller <96...
**W83769 Local Bus IDE Solution <94...
**
**UARTS:
**W86C250A UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter <Jul89...
**W86C451 I/O controller for IBM PC/AT/XT <Jul89...
**W86C452 I/O controller for IBM PC/AT Jul89...
**W86C456 I/O controller [no datasheet] ?
**W860551/P UART with FIFO and Printer Port Controller <94...
**
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