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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...
**800 series...
*Headland/G2...
**HT21 386SX/286 Single Chip (20 MHz) c:Aug91
***Info:
The HT21 is an advanced PC/AT compatible, single-chip 80386SX/80286
design solution. This highly integrated single chip allows simple,
low cost system design options while featuring high performance, low
power consumption, and minimum board space requirements. Advanced
memory management features include support for page mode, 2 or 4-way
interleaving in both pipelined and non-pipelined modes. The LIM 4.0
hardware implementation features dual sets of 32 registers with full
context support for highest performance Optimization of extended local
memory accesses. An advanced EMS hardware write-protect option is
provided. The HT21 supports 256K and 1M DRAMs in l by 1, 1 by 4, and 1
by 9 device configurations for up to 8MB of on-board system memory. A
flexible Shadow RAM option for System and Video BIOS as well as 8-
16-bit BIOS Options adds to overall design versatility.
A complete PC/AT compatible system with advanced features may be
implemented with minimal external support logic. The HT21 performs all
CPU and peripheral support functions in a single chip. Integrated
device functions include DMA Controllers, a Memory Mapper, Timers,
Counters, Interrupt Controllers, a Bus Controller and all supporting
circuitry for PC core logic requirements. The chip also contains all
the necessary address buffers, data transceivers, memory drivers,
parity checking and supporting circuitry for a complete high
performance computer solution. An asynchronous AT Bus clock allows for
a constant 8MHz Bus clock rate for highest bus device compatibility as
defined in IEEE Spec P996. In controlled bus applications the HT21
supports up to a 12 MHz Bus Clock rate. This device is packaged in a
208-pin Plastic Quad Flat Pack combining several external buffers into
this space saving solution.
***Configurations:...
***Features:...
**HT22 386SX/286 Single Chip (25 MHz) c:Sep91...
**HT25 3-volt Core Logic for 386SX c:Dec92...
**HT35 Single-Chip Peripheral Controller [partial info] ?...
**HTK320 386DX Chip Set c:Sep91...
**HTK340 "Shasta" 486 Chip Set c:Jun92...
**Support Chips:
**HT44 Secondary Cache c:Jun92...
**Other:...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
**VT82C586/A/B PCI Integrated Peripheral Controller <10/13/96
***Info:
The VT82C586A PIPC (PCI Integrated Peripheral Controller) is a high
integration, high performance and high compatibility device that
supports Intel and non-Intel based processor to PCI bus bridge to make
a complete Microsoft PC97 compliant PCI/ISA system. In addition to
complete ISA extension bus functionality, the VT82C586A includes
standard intelligent peripheral controllers:
a) Master mode enhanced IDE controller with dual channel DMA engine
and interlaced dual channel commands. Dedicated FIFO coupled with
scatter and gather master mode operation allows high performance
transfers between PCI and IDE devices. In addition to standard PIO
and DMA mode operation, the VT82C586A also supports the emerging
UltraDMA-33 standard to allow reliable data transfer rates up to
33MB/sec throughput. The IDE controller is SFF-8038i v1.0 and
Microsoft Windows-95 compliant.
b) Universal Serial Bus controller that is USB v1.0 and Universal HCI
v1.1 compliant. The VT82C586A includes the root hub with two function
ports with integrated physical layer transceivers. The USB controller
allows hot plug and play and isochronous peripherals to be inserted
into the system with universal driver support. The controller also
implements legacy keyboard and mouse support so that legacy software
can run transparently in a non-USB-aware operating system environment.
c) Keyboard controller with PS2 mouse support.
d) Real Time Clock with 128 byte extended CMOS. In addition to the
standard ISA RTC functionality, the integrated RTC also includes the
date alarm and other enhancements for compatibility with the emerging
ACPI standard.
e) Notebook-class power management functionality including event
monitoring, CPU clock throttling (Intel processor protocol), power and
leakage control, hardware- and software-based event handling, general
purpose IO, chip select and external SMI. The power management
function supports legacy APM v1.2.
f) Plug and Play controller that allows complete steerability of all
PCI interrupts to any interrupt channel. Two additional interrupt and
DMA channels are provided to allow plug and play and reconfigurability
of on-board peripherals for Windows 95 compliance.
The VT82C586A also enhances the functionality of the standard ISA
peripherals. The integrated interrupt controller supports both edge
and level triggered interrupts channel by channel. The integrated DMA
controller supports type F DMA in addition to standard ISA DMA modes.
Compliant with the PCI-2.1 specification, the VT82C586A supports
delayed transactions so that slower ISA peripherals do not block the
traffic of the PCI bus. Special circuitry is built in to allow
concurrent operation without causing dead lock even in a PCI-to-PCI
bridge environment The chip also includes four levels (doublewords) of
line buffers from the PCI bus to the ISA bus to further enhance
overall system performance.
***Versions:...
***Features:...
**VT82C596/A Mobile PCI Integrated Peripheral Controller <11/05/97...
**VT82C686A/B PCI Super-I/O Integrated Peripheral Ctrl. <02/10/98...
**Later P-Pro/II/III/Celeron...
**Later AMD...
**Other...
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