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**82380 32-bit DMA Controller w/ Integrated Peripherals 02/01/87
***Notes:...
***Info:
The 82380 is a multi-function support peripheral that integrates
system functions necessary in an 80386 environment. It has eight
channels of high performance 32-bit DMA with the most efficient
transfer rates possible on the 80386 bus. System support peripherals
integrated into the 82380 provide Interrupt Control, Timers, Wait
State generation, DRAM Refresh Control, and System Reset logic.
The 82380'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
temp orary data storage register for handling non-aligned data without
the need for external alignment logic.
The 82380 contains several independent functional modules. The foll-
owing is a brief discussion of the components and features of the
82380. E$ch module has a corresponding detailed section later in this
data sheet. Those sections should be referred to for design and
programming information.
82380 Architecture:
The 82380 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 Cont-
roller; a 20-level Programmable Interrupt Controller which is a super-
set of the 82C59A; four 16-bit Programmable Interval Timers which are
functionally equivalent to the 82C54 timers; a DRAM Refresh Cont-
roller; a Programmable Wait State Generator; and system reset
logic. The interface to the 82380 is optimized for high-performance
operation with the 80386 microprocessor.
The 82380 operates directly on the 80386 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 82380 also has logic to reset the
80386 via hardware or software reset requests and processor shutdown
status.
After a system reset, the 82380 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 82380 are accessed as bytes. If the internal logic of the 82380
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:...
**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
***Notes:...
***Info:...
***Features:...
**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...
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*SIS...
**85C496/497 486-VIP 486 Green PC VESA/ISA/PCI Chipset <95
***Info:
The SiS 486-VIP (VESA/ISA/PCI) chips are two-chip solution ideally for
Intel's 80486, SL Enhanced 486, P24D/P24T/DX4 CPU, AMD's 486, Enhanced
Am486 and Cyrix's Cx486 (M7)/Cx 5x86 CPU based on green AT system. By
supporting the most popular industrial standard system interfaces, it
provides flexible configurations for system design and applications.
The SiS85C496 PCI & CPU Memory Controller (PCM) integrates the Host
Bridge (Host Interface), the cache and main memory DRAM Controller,
the PCI Bridge, the built-in IDE Controller, and the FS-Link Bus (Fast
Slow Link Bus). It provides the address paths and bus control for
transfers among the Host (CPU/L1 cache), main memory (L2 cache and
DRAM), the Peripheral Component Interconnect (PCI) Bus, and the
FS-Link Bus. The L2 cache controller supports both write-through and
write-back cache policies and cache sizes up to 1 MBytes. The cache
memory can be built using standard asynchronous SRAMs. The main
memory DRAM controller interfaces DRAM to the Host Bus, PCI Bus, and
FS-Link Bus. Up to eight single sided SIMMs or four double sided SIMMs
provide a maximum of 255 MBytes of main memory. The installation of
DRAM SIMMs is "Table-Free", which allows the SIMMs be installed into
any slot location and any combinations. The built-in IDE hard disk
controller allows CPU accessing hard disk and also provides higher
system integration with lower system cost. The 85C496 is intended to
be used with the SiS85C497 which is a AT Bus Controller with built-in
206 controller.
The SiS85C497 AT Bus Controller and Megacells (ATM) provides the
interface between PCI/CPU/Memory Bus (fast machine) and the ISA Bus
(slow machine). It also integrates many of the common I/O functions
in today's ISA based PC systems. The 85C497 comprises the FS-Link
interface (Fast-Slow Link interface), ISA bus controller , DMA
controller and data buffers to isolate the FS-Link Bus from the ISA
Bus and to enhance performance. It also integrates a 14 channel
edge/level interrupt controller, refresh controller, a 8-bit BIOS
timer, three programmable timer/counters, non-maskable-interrupt (NMI)
control logic, Power Management Unit, and RTC. Figure 1 .1 [see
datasheet] shows the system block diagram.
***Configurations:...
***Features:...
**85C501/502/503 Pentium/P54C PCI/ISA Chipset <01/09/95...
**5101/5102/5103 Pentium/P54C PCI/ISA Chipset <04/02/95...
**5120 Pentium PCI/ISA Chipset (Mobile) <01/28/97...
**5501/5502/5503 Pentium/P54C PCI/ISA Chipset <04/02/95...
**5511/5512/5513 Pentium PCI/ISA <06/14/95...
**5571 (Trinity) Pentium PCI/ISA Chipset (75MHz) <12/09/96...
**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:...
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