[Home] [This version is outdated, a new version is here]
*Title...
*Search:...
*Read Me/FAQ/General Info...
*_IBM...
*ACC Micro...
*ALD...
*ALi...
*AMD . . . . . . . [no datasheets, some info]...
*Chips & Technologies...
*Contaq  . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**82370       Integrated System Peripheral (for 82376)         c:Oct88
***Notes:...
***Info:
The  82370  is a  multi-function  support  peripheral that  integrates
system  functions necessary  in  an 80376  environment.  It has  eight
channels  of  high performance  32-bit  DMA  (32-bit internal,  16-bit
external) with the most efficient transfer rates possible on the 80376
bus.  System support  peripherals  integrated into  the 82370  provide
Interrupt  Control,  Timers,   Wait  State  generation,  DRAM  Refresh
Control, and System Reset logic.

The  82370's  DMA Controller  can  transfer  data  between devices  of
different data  path widths using  a single channel. Each  DMA channel
operates independently  in any  of several modes;  Each channel  has a
temporary data storage register  for handling non-aligned data without
the need for external alignment logic.

1.0 FUNCTIONAL OVERVIEW
The  82370  contains   several  independent  functional  modules.  The
following is a brief discussion  of the components and features of the
82370. Each module has a  corresponding detailed section later in this
data  sheet. Those  sections  should  be referred  to  for design  and
programming information.

1.1 82370 Architecture

The 82370 is  comprised of several computer system  functions that are
normally found in separate LSI  and VLSI components.  These include: a
high-performance,   eight-channel,   32-bit   Direct   Memory   Access
Controller; a  20-level Programmable  Interrupt Controller which  is a
superset of the 82C5SA; four 16-bit Programmable Interval Timers which
are  functionally  equivalent  to   the  82C54  timers;  DRAM  Refresh
Controller;  a Programmable  Wait  State Generator;  and system  reset
logic. The  interface to the  82370 is optimized  for high-performance
operation with the 80376 microprocessor.

The 82370  operates directly on the  80376 bus. In the  Slave Mode, it
monitors the  state of the  processor at all  times and acts  or idles
according  to  the commands  of  the  host.  It monitors  the  address
pipeline status and generates the programmed number of wait states for
the device  being accessed. The 82370  also has logic to  the reset of
the  80376  via hardware  or  software  reset  requests and  processor
shutdown status.

After a  system reset, the 82370 is  in the Slave Mode.  It appears to
the  system as  an I/O  device. It  becomes a  bus master  when  it is
performing DMA transfers.

To maintain compatibility with existing software, the registers within
the 82370  are accessed as bytes.  If the internal logic  of the 82370
requires a delay  before another access by the  processor, wait states
are  automatically inserted into  the access  cycle.  This  allows the
programmer to  write initialization  routines, etc. without  regard to
hardware recovery times.

***Versions:...
***Features:...
**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...
**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
Chips:         
Memory Access Controller (MAC)  
Data Interface Buffer (DIB)
CPUs:          8x P-III Xeon Oct
DRAM Types:    SDRAM PC100 2-way Interleave dual channel
Max Mem:       32GB
ECC/Parity:    ECC
AGP speed:     N/A
Bus Speed:     100
PCI Clock/Bus: 1/3 PCI-66/64



**800 series...
*Headland/G2...
**HT35          Single-Chip Peripheral Controller [partial info]     ?
***Notes:...
**HTK320        386DX Chip Set                                 c:Sep91...
**HTK340        "Shasta" 486 Chip Set                          c:Jun92...
**Support Chips:
**HT44          Secondary Cache                                c:Jun92...
**Other:
HT209D   VGA
HT216-32 Local Bus VGA Controller

*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...