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**82396SX Smart Cache 12/17/90
***Notes:...
***Info:...
***Versions:...
***Features:...
**82485 Turbo Cache (and 485Turbocache) c90...
**82489DX Advanced Programmable Interrupt Controller 10/12/92...
**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:
Chips:
[82454NX] (PXB) [82453NX] (MUX)
[82452NX] (RCG) [82451NX] (MIOC)
[82371EB] (PIIX4E),
CPUs: Single/Dual/Quad P-II Xeon/P-III Xeon
DRAM Types: FPM EDO 2-way Interleave 4-way Interleave
Mem Rows: 8
DRAM Density: 16Mbit 64Mbit
Max Mem: 8GB
ECC/Parity: Both
AGP speed: N/A
Bus Speed: 100
PCI Clock/Bus: 1/3
**????? (Profusion) c:99...
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**IBM AT: MC146818 Real Time Clock <84
***Info:
The MC146818 Real-Time Clock plus RAM is a peripheral device which
includes the unique MOTEL concept for use with various
microprocessors, microcomputers, and larger computers. This part
combines three unique features: a complete time-of-day clock with
alarm and one hundred year calender, a programmable periodic interrupt
and square-wave generator, and 50 bytes of low-power static RAM. The
MC146818 uses high-speed CMOS technology to interface with 1 MHz
processor busses, while consuming very little power.
The Real-Time Clock plus RAM has two distinct uses. First, it is
designed as a battery powered CMOS part (in an otherwise NMOS/TTL
system) including all the common battery backed-up functions such as
RAM, time, and calendar. Secondly, the MC146818 may be used with a
CMOS microprocessor to relieve the software of the timekeeping
workload and to extend the available RAM of an MPU such as the
MC146805E2
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