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**82497/492 Cache Controller / Cache RAM (for P54 Pentium) <Nov94
***Notes:
Date source: 1995_Intel_Pentium_Processors_and_Related_Components.pdf
Information taken from:
1995_Intel_Pentium_Processors_and_Related_Components.pdf*
8249x Cache controllers.pdf**
>* Datasheet dated Nov'94
>** Datasheet undated, whole document dated '95
The info and features section have been solely sourced from the first
source. The second source provides far more detail. Additional
information in the configurations section and below have been sourced
from the second.
"Although the 82497 Cache Controller is part of the Pentium processor
(735\90, 815\100, 1000\120, 1110\133) CPU-Cache Chip Set and the 82496
Cache Controller is part of the Pentium Processor (510\60, 567\66)
Chip Set, the two parts are functionally identical except for the
differences noted in this section." - p491
Aside from some minor differences in pin configuration, the main
difference is the direct support for 3.3V processors. This chipset is
still a 5V part. The cache operates at bus speed, max 66MHz.
This chip was used on the Pentium 90MHz CPU complexes of Intel's
Xpress platform. Specifically the BXCPUPENT90 (Single 90MHz, 16
82492s). Also found on IBM 9595/Server 500 Pentium 90MHz complexes.
***Info:...
***Configurations:...
***Features:...
**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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**W83777F/87F Power I/O (Multi I/O) <95
***Info:...
***Versions:...
***Features:
o Compatible with IBM PC AT disk drive systems
o Variable write pre-compensation with track selectable capability
o DMA enable logic
o Non-burst mode DMA option
o Supports floppy disk drives and tape drives
o Detects all overrun and underrun conditions
o Data rate and drive control registers
o Built-in address mark detection circuit to simplify the read
electronics
o IBM PC system address decoder
o Supports up to two embedded hard disk drives (IDE AT BUS)
o Single 24 MHz crystal input
o Two high-speed 16550 compatible UARTs with 16-byte send/receive
FlFOs
o MIDI compatible
o Fully programmable serial-interface characteristics:
- 5, 6, 7 or 8-bit characters
- Even, odd or no parity bit generation/detection
- 1, 1.5 or 2 stop bits generation
o Internal diagnostic capabilities:
- Loop-back controls for communications link fault isolation
- Break, parity, overrun, framing error simulation
o Programmable baud generator allows division of 1.8461 MHz by 1 to
(2^16 - 1)
o Compatible with IBM parallel port
o Supports parallel port with bi-directional lines
o Supports Enhanced Parallel Port (EPP)
- Compatible with IEEE 1284 specification
o Supports Extended Capabilities Port (ECP)
- Compatible with IEEE 1284 specification
o Extension FDD mode supports disk drive B through parallel port
o Extension Adapter Mode supports pocket devices through parallel
port
o Extension 2FDD mode supports disk drives A and B through parallel
port
o JOYSTICK mode supports joystick through parallel port
o Programmable configuration settings
o Immediate or automatic power-down mode for power management
o All hardware power-on settings have internal pull-up or pull-down
resistors as default value
o FDD anti-virus functions with software write protect and FDD
write enable signal, write data signal force inactive
o Packaged in 100-pin QFP
W83777F:
o Supports up to four 3.5-inch or 5.25-inch floppy disk drives
o Completely compatible with industry standard 82077
o 360K/720K/1.2M/1.44M/2.88M format
o 250K, 300K, 500K, 1M bps data transfer rate
o Supports vertical recording format
o 16-byte data FIFOs
o Pins and functions downward compatible with W83757F, W83757AF,
W83767F, and W83787F
W83787F:
o Supports up to four 3.5-inch or 5.25-inch floppy disk drives
o Completely compatible with industry standard 765
o 360K/720K/1.2M/1.44M format
o 250K, 300K, 500K bps data transfer rate
o Pins and functions downward compatible with W83757F, W83757AF,
and W83767F
**W83877F WINBOND I/O (Multi I/O) <96...
**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...
**
**Other:...
*ZyMOS...
*General Sources:...
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