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**82495DX/490DX DX CPU-Cache Chip Set <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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...
**HT18 80386SX Single Chip c:Sep91
***Info:
The HT18 is an advanced PC/AT compatible, single-chip 80386SX 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, with 2 or 4-way
interleaving in both pipelined and non-pipelined modes(18A/B only).
Extended Hardware EMS options include dual sets of 32 registers with
multiple context operation. Revisions A/B support 256K and 1M DRAMs in
1 by 1, 1 by 4, and 1 by 9 device configurations. Rev C supports 4M
devices, as well. A Shadow RAM option for System Video BIOS and dual
or single system ROM BIOS support adds to overall design versatility.
A complete PC/AT compatible system with advanced features may be
implemented with minimal external support logic. The HT18 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. An asynchronous AT Bus clock
allows for a constant 8MHz Bus clock rate for highest bus device
compatibility as defined in IEEE Spec P996. This device is packaged in
a 208-pin Plastic Quad Flat Pack combining several external buffers
into this space saving solution.
***Configurations:...
***Features:...
**HT21 386SX/286 Single Chip (20 MHz) c:Aug91...
**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...
**VT82C580VP Apollo VP, Pentium/M1/K5 PCI/ISA System <02/15/96
***Info:
The VT82C580VP Apollo-VP is a high performance, cost-effective and
energy efficient chip set for the implementation of PCI/ISA desktop
and notebook personal computer systems based on the 64-bit
P54C/Pentium/K5/M1 super-scalar processors. CPU and cache interface is
supported up to 66Mhz CPU external bus speed (with CPU internal speed
up to 200Mhz and above). The CPU, DRAM and PCI bus are all
independently powered so that each of the bus can be run at 3.3v or
5v, independently. The ISA bus always runs at 5v.
The VT82C580VP chip set consists of the VT82C585VP system controller,
the VT82C586 PCI to ISA bridge, and two instances of the VT82C587VP
data buffers. The CPU bus is minimally loaded with only the CPU,
secondary cache and the chip set. The VT82C587VP data buffers isolate
the CPU bus from the DRAM and PCI bus so that CPU and cache operation
may run reliably at the high frequencies demanded by today's
processors. The VT82C585VP contains arbitration logic to support the
UMA (unified memory architecture) with video/GUI products from major
video vendors. Multiple deep FIFOs (thirty-two double words) are
included between multiple data paths to allow efficient concurrent
operation and DRAM utilization. The VT82C586 PCI to ISA bridge
includes integrated 206-style IPC (DMA, interrupt controller and
timer), integrated keyboard controller with PS2 mouse support,
integrated DS12885 style real time clock with extended 128 byte CMOS
RAM, integrated master mode enhanced IDE controller with full scatter
and gather capability, and integrated USB (universal serial bus)
interface with root hub and two function ports with built-in physical
layer transceiver. A complete main board can be implemented with only
six TTLs. Please refer to Figure 1 [see datasheet] for the system
block diagram.
***Configurations:...
***Features:...
**VT82C580VPX Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590 Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT Apollo VP3, Single-Chip for Pentium with AGP <10/03/97...
**VT82C598MVP Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97...
**VT8501 Apollo MVP4,Single-Chip 66-100MHz & AGP <11/04/98...
**VT82C680 Apollo P6, Pentium-Pro Chip Set <08/30/96...
**Support chips:
**VT82C505 Pentium/486 VL to PCI Bridge <05/30/94...
**VT82C586/A/B PCI Integrated Peripheral Controller <10/13/96...
**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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