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**82395SX Smart Cache 12/17/90
***Notes:...
**82396SX Smart Cache 12/17/90...
**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:...
**????? (Profusion) c:99...
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*OPTi...
**82C822 PCIB (VLB-to-PCI bridge) c:94
***Notes:...
***Info:
OPTi's 82C822 VESA local bus to PCI Bridge (PCIB) chip is a high
integration 208-pin PQFP device designed to work with VESA VL bus
compatible core logic chipsets. The 82C822 PCIB provides interface to
the high performance PCI bus and is fully compliant to the PCI Version
2.0 specification. The 82C822 requires no glue logic to implement the
PCI bus interface and hence it allows designers to have a highly
integrated motherboard with both VESA local bus and PCI local bus
support. The PCIB chip offers premium performance and flexibility for
VESA VL-based desktop systems running up to 50MHz. The 82C822 PCIB can
be used with OPTi's 82C802G core logic and 82C602 buffer chipsets to
build a low cost and power efficient 486-based desktop solution. It
also works with OPTi 82C546/547 chipset to build a high performance
PCI/VL solution based on the Intel P54C processor.
The 82C822 PCIB provides all of the control, address and data paths to
access the PCI bus from the VESA Local bus (VL bus). The 82C822
provides a complete solution including data buffering, latching,
steering, arbitration, DMA and master functions between the 32-bit VL
bus and the 32-bit PCI bus.
The PCIB works seamlessly with the motherboard chipset bus arbiter to
handle all requests of the host CPU and PCI bus masters, DMA masters,
I/O relocation and refresh. Extensive register and timer support are
designed into the 82C822 to implement the PCI specification.
The 82C822 is a true VESA to PCI bridge. It has the highest priority
on CPU accesses after cache and system memory. It generates LDEV#
automatically and then compares the addresses with its internal
registers to determine whether the current cycle is a PCI cycle. When
a cycle is identified as PCI cycle, the 82C822 will take over the
cycle and then return RDY# to the CPU. If not, the 82C822 will give up
the cycle to the local device or, in the case of an ISA slave,
generate a BOFF# cycle to the CPU. This action will abort the cycle
and allow the CPU to rerun the cycle.
The 82C822 includes registers to determine shadow memory space, hole
locations and sizes to allow the 82C822 to determine which memory
space should be local and which is located on the ISA bus. Upon access
to memory, the 82C822 can determine whether or not the cycle is a PCI
access by comparing the cycle with its internal registers.
***Versions:...
***Features:...
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
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*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
**VL82C110 Combination I/O chip ?
***Info:
The VL82C110 Combination I/O chip replaces several of the commonly
used peripherals found in PC/AT-compatible computers. The VL82C110
contains a 765A compatible floppy disk controller with a digital data
clock separator, writ precompensation logic and the necessary control
registers. It also contains two 16C450 compatible UARTs, a Centronics
compatible printer port, and an internal PMU (power management unit)
which is useful in applications where low power consumption is
essential. Additionally, a PLL clock circuit is included to provide
one of seven of the commonly used CPU clock frequencies. This 100-pin
chip allows designers to implement a very cost-effective, minimum chip
count motherboard containing functions that are common to virtually
all PCs.
The internal PMU provides a Sleep output which OS asserted via
automatically after a programmable time delay period of inactivity in
any of the major on-chip functions. Conversely, the sleep output will
be de-asserted when any activity is detected to any of the major
on-chip functions.
The on-chip UARTs are 100% software compatible with the VL16C450 ACE.
The bidirectional parallel port provides a PS/2 software compatible
interface between a Centronics-style printer and the VL82C110. Direct
drive is provided so that all that is necessary to interface to the
line printer is a resistor-capacitor network. The bidirectional
feature (option) is software programmable for backwards PC/AT-
compatibility.
The on-chip disk controller OS 100% compatible to the industry
standard 765A. The internal digital data separator is capable of
operating up to a 500 kb/s data rate. The Controller also implements
all of the DP8473 disk controller functions.
The necessary signals are provided to implement the Integrated Drive
Electronics (IDE) interface.
A 24 MHz oscillator is included for UART baud rate generation and the
floppy disk controller clock, It is also used to generate, via
software control, a 20, 25, 32, 40, 50, 66 or 80 MHz output which can
be used as a CPU input clock. This feature may be disabled at power-up
reset time.
Software configurable registers are provided to enable and disable
major blocks, assign addresses, and control other functions within the
VL82C110.
***Versions:...
***Features:...
**VL82C113 SCAMP Combination I/O chip ?...
**VL82C114 Combination I/O chip ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...
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