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**IBM PC/XT/AT Chip Sets
***Datasheets:...
***Read Me:...
***Overview (History):
The original chipsets used by IBM for the PC and XT are based on the
Intel iAPX 88 system. Some additional components are taken from the
MCS-80/85 system. The iAPX 88 system consists of the 8088 CPU and
support chips. It is a modification of the iAPX 86 system (8086 CPU),
with the iAPX 86 having a 16-bit external bus, and the iAPX 88 having
an 8-bit external bus. The iAPX 86 system was formerly known as the
MCS-86 system.
The chips used in Both the PC/XT and the AT were introduced by Intel
at various different times over approximately a decade between 1975
and 1984. In addition there are various different revisions of a
particular chip. Due to these differences, relying on a datasheet from
a particular year alone, is insufficient. So for a particular chip,
differences between the datasheets are noted. This information can be
found in the ****Notes section of each chip. The information from the
datasheets, quoted in this document, is not the complete datasheet.
The actual datasheet contains more information. This is done for
brevity.
Also included is information about forerunners of chips used by the
IBM systems. For example, the 8255 (forerunner to the 8255A) has been
included. At a bit more of a stretch, the 8257 (essentially a
forerunner to the 8237) has also been included.
***Summary of sections:...
***§1: Intel MCS-8x/iAPX Microprocessor families:...
***§2: Intel Chip Specifications 1975 - Jan 1982:...
***§3: IBM PC/XT: Original system chips: ...
***§4: Intel Chip Specifications Jan 1982 - Jan? 1984...
***§5: IBM AT: Original system chips:...
***§6: Intel Chip Specifications Jan? 1984 - 1989...
**82230/82231 High Integration AT-Compatible Chip Set(ZyMOS) c:Aug88...
**82310 Micro Channel Compatible Peripheral Chip Set 04/21/88...
**82311 High Integration MCA Compatible Perip. Chip Set 11/14/88...
**82320 MCA compatible Chipset [no datasheet] 04/10/89...
**82340DX Chip Set (VLSI) (82346/82345/82355) 01/08/90...
**82340SX Chip Set (VLSI) (82343/82344) 01/25/89...
**82350 EISA Chip Set 07/10/89...
**82350DT EISA Chip Set 04/22/91...
**82420TX/ZX PCIset (for 486) TX (Saturn), ZX (Saturn II) c:Nov92...
**82420EX PCIset (for 486) EX (Aries) (82425EX/82426EX) <Dec94...
**82430LX PCIset (Pentium) LX (Mercury) (82433LX/82434LX) 03/22/93...
**82430NX PCIset (Pentium) NX (Neptune) (82433NX/82434NX) Mar94...
**82430FX PCIset (Pentium) FX (Triton I) (82437FX/82438FX)01/31/95...
**82430MX PCIset (Pentium) MX (Mobile Triton)(82437/438MX)11/01/95...
**82430HX PCIset (Pentium) HX (Triton II) (82439HX) 02/12/96...
**82430VX PCIset (Pentium) VX (Triton II) (82437VX/82438) 02/12/96...
**82430TX PCIset (Pentium) TX (Triton II) (82439TX) 02/17/97...
**82450KX/GX PCIset (Pentium Pro) KX/GX (Mars/Orion) 11/01/95...
**
**Support Chips:
**82091AA Advanced Interface Peripheral (AIP) c93...
**8289 Bus Arbiter (808x) c79...
**82289 Bus Arbiter for iAPX 286 Processor Family c83...
**82258 Advanced Direct Memory Access Coprocessor(ADMA) 01/01/84...
**82335 High-Integration Interface Device For 386SX c:Nov88...
**82360SL I/O Subsystem 10/05/90...
**82370 Integrated System Peripheral (for 82376) c:Oct88...
**82371FB/SB PCI ISA IDE Xcelerator 82371FB/82371SB (PIIX/3) 01/31/95...
**82371MX Mobile PCI I/O IDE Xcelerator (MPIIX) 11/01/95...
**82371AB PCI-TO-ISA / IDE Xcelerator 82371AB (PIIX4) 02/17/97...
**82374/82375 PCI-EISA Bridge (82374EB/82375EB, 374SB/375SB) c:Mar93...
**82378 System I/O (SIO) (82378IB and 82378ZB) c:Mar93...
**82379AB System I/O-APIC (SIO.A) <Dec94...
**82380 32-bit DMA Controller w/ Integrated Peripherals 02/01/87...
**82380FB/AB PCIset: 82380FB Mobile PCI-to-PCI Bridge(MPCI2) 02/17/97...
**82384 Clock Generator and Reset Interface c86...
**82385 32-bit Cache Controller for 80386 09/29/87...
**82385SX 32-bit Cache Controller for 80386SX 01/25/89...
**82395DX High Performance Smart Cache 06/18/90...
**82395SX Smart Cache 12/17/90...
**82396SX Smart Cache 12/17/90...
**82485 Turbo Cache (and 485Turbocache) c90
***Notes:...
***Info:...
***Versions:...
***Features:...
**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...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**5571 (Trinity) Pentium PCI/ISA Chipset (75MHz) <12/09/96
***Info:...
***Configurations:...
***Features:
o Supports Intel Pentium CPU and other compatible CPU at
75/66/60/50MHz (external clock speed)
o Supports the Pipelined Address Mode of Pentium CPU
o Supports the Full 64-bit Pentium Processor data Bus
o Supports 32-bit PCI Interface
o Integrated Second Level (L2) Cache Controller
- Write Through and Write Back Cache Modes
- 8 bits or 7 bits Tag with Direct Mapped Cache Organization
- Integrated 16K bits Dirty Ram
- Supports Pipelined Burst SRAM
- Supports 256 KBytes to 512 MBytes Cache Sizes
- Cache Read/Write Cycle of 3-1-1-1-1-1-1-1 at 66 MHz
o Integrated DRAM Controller
- Supports 3 Banks of FP/EDO SIMMs, or 2 Banks of SDRAM DIMMs
- Supports 2Mbytes to 384Mbytes of main memory
- Supports 256K/512K/1M/2M/4M/16M x N FP/EDO/SDRAM DRAM
- Supports 3V or 5V DRAM.
- Supports Symmetrical and Asymmetrical DRAM.
- Supports 32 bits/64 bits mixed mode configuration
- Supports Concurrent Write Back for FP/EDO DRAM
- Supports Mixed DRAM (FP/EDO/SDRAM) Technology
- Supports CAS before RAS Refresh
- Supports Relocation of System Management Memory
- Programmable CAS# ,RAS#, RAMW# and MA Driving Current
- Fully Configurable for the Characteristic of Shadow RAM (640
KBytes to 1 MBytes)
- Supports FP DRAM 5-3-3-3(-3-3-3-3) Burst Read Cycles
- Supports EDO DRAM 4/5-2-2-2(-2-2-2-2) Burst Read Cycles
- Supports SDRAM 6/7-1-1-1(-2-1-1-1) Burst Read Cycles
- Supports X-1-1-1/X-2-2-2/X-3-3-3 Burst Write Cycles
- Supports 8 Qword Deep Buffer for Read/Write Reordering, Dword
Merging and 3/2-1-1-1 Post write Cycles
- Two Programmable Non-Cacheable Regions
- Option to Disable Local Memory in Non-Cacheable Regions
- Shadow RAM in Increments of 16 KBytes
o Integrated PMU Controller
- Supports SMM Mode of CPU
- Supports CPU Stop Clock
- Supports Break Switch
- Supports Modem Ring Wakeup
- Supports Automatic Power Supply Control
o Provides High Performance PCI Arbiter.
- Supports 3 internal masters and 5 external PCI Masters
- Supports Rotating Priority Mechanism
- Hidden Arbitration Scheme Minimizes Arbitration Overhead.
- Supports Concurrency between CPU to Memory and PCI to PCI.
o Integrated Host-to-PCI Bridge
- Supports Asynchronous/Synchronous PCI Clock
- Translates the CPU Cycles into the PCI Bus Cycles
- Provides CPU-to-PCI Read Assembly and Write Disassembly
Mechanism
- Translates Sequential CPU-to-PCI Memory Write Cycles into PCI
Burst Cycles
- Zero Wait State Burst Cycles
- Supports 8 DW Deep Buffer for CPU-to-PCI Posted Write Cycles
- Supports Pipelined Process in CPU-to-PCI Access
- Supports Advance Snooping for PCI Master Bursting
- Maximum PCI Burst Transfer from 256 Bytes to 4 Kbytes
- Fast back-to-back
o Integrated Posted Write Buffers and Read Prefetch Buffers to
Increase System Performance
- CPU-to-Memory Posted Write Buffer (CTMFF) with 8 QW Deep, Always
Sustains 0 Wait Performance on CPU-to-Memory.
- CPU-to-PCI Posted Write Buffer(CTPFF) with 8 DW Deep
- PCI-to-Memory Posted Write Buffer(PTHFF) with 8 QW Deep, Always
Streams 0 Wait Performance on PCI-to/from-Memory Access
- PCI-to-Memory Read Prefetch Buffer(CTPFF) with 8 QW Deep
o Built-in one 32-bit General Purpose Register
o Integrated PCI-to-ISA Bridge
- Translates PCI Bus Cycles into ISA Bus Cycles
- Translates ISA Master or DMA Cycles into PCI Bus Cycles
- Provides a Dword Post Buffer for PCI to ISA Memory cycles
- Two 32 bit Prefetch/Post Buffers Enhance the DMA and ISA Master
Performance
- Fully Compliant to PCI 2.1
o Enhanced DMA Functions
- 8-, 16- bit DMA Data Transfer
- ISA compatible, and Fast Type F DMA Cycles
- Two 8237A Compatible DMA Controllers with Seven Independent
Programmable Channels
- Provides the Readability of the two 8237 Associated Registers
o Built-in Two 8259A Interrupt Controllers
- 14 Independently Programmable Channels for Level- or Edge-
triggered Interrupts
- Provides the Readability of the two 8259A Associated Registers
o Three Programmable 16-bit Counters compatible with 8254
- System Timer Interrupt
- Generates Refresh Request
- Speaker Tone Output
- Provides the Readability of the 8254 Associated Registers
o Built-in Keyboard Controller
- Hardwired Logic Provides Instant Response
- Supports PS/2 Mouse
- Support Hot Key "Sleep" Function
o Built-in Real Time Clock(RTC) with 256B CMOS SRAM
o Fast PCI IDE Master/Slave Controller
- Fully Compatible with PCI Local Bus Specification V2.1
- Supports PCI Bus Mastering
- Plug and Play Compatible
- Supports Scatter and Gather
- Supports Dual Mode Operation - Native Mode and
Compatibility Mode
- Supports IDE PIO Timing Mode 0, 1, 2 of ANSI ATA Specification
- Supports Mode 3 and Mode 4 Timing Proposal on Enhanced IDE
Specification
- Supports Multiword DMA Mode 0, 1, 2
- Separate IDE Bus
- Two 8x32-bit FIFO for PCI Burst Read/Write Transfers.
o Universal Serial Bus Controller
- Host/Hub Controller
- Two USB ports
o On-Board Plug and Play Support
- One Steerable DMA Channel
- One Steerable Interrupt
- One Programmable Chip Select
o Supports the Reroutibility of the four PCI Interrupts
o Supports Flash ROM
o 480-Pin BGA Package
o 0.5 μm CMOS Technology
**5581/5582 (Jessie) Pentium PCI/ISA Chipset (75MHz) <04/15/97...
**5591/5592/5595 (David) Pentium PCI A.G.P. Chipset <01/09/98...
**5596/5513 (Genesis) Pentium PCI Chipset <03/26/96...
**5597/5598 (Jedi) Pentium PCI/ISA Chipset <04/15/97...
**530/5595 (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540 (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x SoC (System-on-chip) <03/14/02...
**
**Support chips:
**85C206 Integrated Peripheral Controller [no datasheet] ?...
**5595 Pentium PCI System I/O <12/24/97...
**950 LPC I/O <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...
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