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**82489DX Advanced Programmable Interrupt Controller 10/12/92
***Notes:...
***Info:
1.0 INTRODUCTION
The 82489DX Advanced Programmable Interrupt Controller provides
multiprocessor interrupt management, providing both static and dynamic
symmetrical interrupt distribution across all processors.
The main function of the 82489DX is to provide interrupt management
across all processors. This dynamic interrupt distribution includes
routing of the interrupt to the lowest-priority processor. The 82489DX
works in systems with multiple I/O subsystems, where each subsystem
can have its own set of interrupts. This chip also provides
inter-processor interrupts, allowing any processor to interrupt any
processor or set of processor. Each 82489DX I/O init interrupt input
pin is individually programmable by software as either edge or level
triggered. The interrupt vector and interrupt steering information an
be specified per pin. A 32-bit wide timer is provided that can be
programmed to interrupt the local processor. the timer can be used as
a counter to provide a time base to software running on the processor,
or to generate time slice interrupts locally to that processor. the
82489DX provides 32-bit software access to its internal
registers. Since no 82489DX register read have any side effects, the
82489DX registers can be aliased to a user read-only page for fast
user access (e.g., performance monitoring timers).
The 82489DX supports a generalized naming/addressing scheme that can
be tailored by software to fit a variety of system architectures and
usage models. It also supports 8259A compatibility by becoming
virtually transparent with regard to an externally connected 8259A
style controller, making the 8259A visible to software.
***Versions:...
***Features:...
**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...
**5595 Pentium PCI System I/O <12/24/97
***Notes:...
***Info:...
***Versions:...
***Features:...
**950 LPC I/O <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
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*Unresearched:...
*VIA...
**VT82C590 Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97
***Info:...
***Configurations:...
***Features:
o PCI/ISA Green PC Ready
- Supports 3.3V or 5V interface to CPU, system memory, and / or
PCI bus
- Supports CPUs with internal voltages below 3.3V
- PC-97 compatible using VT82C586B South Bridge with ACPI Power
Management
o High Integration
- Single chip implementation for 64-bit Pentium-CPU, 64-bit system
memory, and 32-bit PCI interface
- VT82C590 Apollo VP2 Chipset: VT82C595 system controller and
VT82C586B PCI to ISA bridge
- Chipset includes UltraDMA-33 EIDE, USB, and Keyboard / PS2-Mouse
Interfaces plus RTC / CMOS on chip
- Six TTLs for a complete main board implementation
o Flexible CPU Interface
- Supports 64-bit Pentium, AMD 5k86 , AMD 6k86 and Cyrix 6x86 CPUs
- CPU external bus speed up to 66 Mhz (internal 200Mhz and above)
- Supports CPU internal write-back cache
- System management interrupt, memory remap and STPCLK mechanism
- Cyrix 6X86 linear burst support
- CPU NA# / Address pipeline capability
o Advanced Cache Controller
- Direct map write back or write through secondary cache
- Pipelined burst synchronous SRAM (PBSRAM) cache support (with
global write enable feature)
- Flexible cache size: 0K/256K/512K/1M/2MB
- 32 byte line size to match the primary cache
- Integrated 10-bit tag comparator
- 3-1-1-1 read/write timing for PBSRAM access at 66 Mhz
- 3-1-1-1-1-1-1-1 back to back read timing for PBSRAM access at
66 Mhz
- Sustained 3 cycle write access for PBSRAM access or CPU to DRAM
and PCI bus post write buffers at 66 Mhz
- Data streaming for simultaneous primary and secondary cache
line fill
- System and video BIOS cacheable and write-protect
- Programmable cacheable region and cache timing
o Fast DRAM Controller
- Fast Page Mode/EDO/Synchronous-DRAM support in a mixed
combination
- Mixed 1M/2M/4M/8M/16MxN DRAMs
- 6 banks up to 512MB DRAMs
- Flexible row and column addresses
- 64-bit or 32-bit data width in arbitrary mixed combination
- 3.3v and 5v DRAM without external buffers
- Optional bank-by-bank ECC (single-bit error correction and
multi-bit error detection) for DRAM integrity
- Two-bank interleaving for 16Mbit SDRAM support
- Two-bank and four bank interleaving for 64Mbit SDRAM support
(14 MA lines)
- Four cache lines (16 quadwords) of CPU/cache to DRAM write
buffers
- Concurrent DRAM writeback
- Speculative DRAM access
- Read around write capability for non-stalled CPU read
- Burst read and write operation
- 4-2-2-2 on page, 7-2-2-2 start page and 9-2-2-2 off page timing
for EDO DRAMs at 50/60 MHz
- 5-2-2-2 on page, 8-2-2-2 start page and 11-2-2-2 off page timing
for EDO DRAMs at 66 MHz
- 6-1-1-1 on page, 8-1-1-1 start page and 10-1-1-1 off page for
SDRAMs at 66 MHz
- 5-2-2-2-3-1-2-2 back-to-back access for EDO DRAM at 66 MHz
- 6-1-1-1-3-1-1-1 back-to-back access for SDRAM at 66 MHz
- BIOS shadow at 16KB increment
- Decoupled and burst DRAM refresh with staggered RAS timing
- Programmable refresh rate, CAS-before-RAS refresh and refresh
on populated banks only
o Intelligent PCI Bus Controller
- 32 bit 3.3/5v PCI interface
- Synchronous divide-by-two PCI bus interface
- PCI master snoop ahead and snoop filtering
- PCI master peer concurrency
- Synchronous bus to CPU clock with divide-by-two from the CPU
clock
- Automatic detection of data streaming burst cycles from CPU to
the PCI bus
- Five levels (double-words) of CPU to PCI posted write buffers
- Byte merging in the write buffers to reduce the number of PCI
cycles and to create further PCI bursting possibilities
- Zero wait state PCI master and slave burst transfer rate
- PCI to system memory data streaming up to 132Mbyte/sec
- Forty-eight levels (double-words) of post write buffers from PCI
masters to DRAM
- Sixteen levels (double-words) of prefetch buffers from DRAM for
access by PCI masters
- Enhanced PCI command optimization (MRL, MRM, MWI, etc.)
- Complete steerable PCI interrupts
- Supports L1 write-back forward to PCI master read to minimize
PCI read latency
- Supports L1 write-back merged with PCI master post-write to
minimize DRAM utilization
- Provides transaction timer to fairly arbitrate between PCI
masters
- PCI-2.1 compliant
o Built-in nand-tree pin scan test capability
o 0.6um mixed voltage, high speed / low power CMOS process
o 328 pin Low-Profile BGA Package
**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...
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