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**82395SX Smart Cache 12/17/90
***Notes:...
**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...
**800 series...
*Headland/G2...
**HT44 Secondary Cache c:Jun92
***Info:
The HT44 is a look-aside write-through, 80486SX, 486DX or 486DX2
secondary cache controller. It is packaged in an inexpensive 84-pin
plastic-leaded chip carrier (PLCC).
Architecture
With its look-aside architecture, the HT44 fits beside the CPU-to-
Memory bus and not in the data path. Therefore, once the HT44 has
been designed into a 486 system, it can be populated for secondary
cache systems or left vacant for non-secondary cache systems. The HT44
is direct-mapped to the available address space.
Performance
The HT44 has a number of performance enhancing features. These
include zero-waitstate burst line fills to the 486 on secondary cache
hits, and simultaneous 486 and secondary cache updates on read misses.
Memory Configurations
The HT44 supports cache sizes from 32KBytes to 1MB. Both synchronous
and asynchronous SRAMs are supported. 25ns SRAMs are sufficient for
zero-wait-state operation at 33MHz.
Chip Set Support
The HT44 can, be implemented with minimal glue logic in a 486 system
with the HTK340 (code name Shasta) chip set. The registers in the
HTK340 allow for programming of non-cacheable and write-protected
areas of memory. The HTK340 will support the HT44 with synchronous
SRAMs only. Future Headland chip sets will support both synchronous
and asynchronous SRAM designs.
The HT44 can also be used with some third-party chip sets, however,
additional glue logic may be required.
***Versions:...
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*HMC (Hulon Microelectronics)...
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*Unresearched:...
*VIA...
*VLSI...
**VL82C323 SCAMP II, 5 Volt Power Management Unit (PMU) ?
***Info:...
***Versions:...
***Features:
o Supports X86-based PC/AT-compatible systems
o Provides system activity monitoring, peripheral control, power
supply control, mode timers, and general purpose I/O for laptop/
notebook power management
o Includes the logic to support X86 processors with the System
Management Mode (SMM) feature
o Five operation modes:
- On Mode
- Doze Mode
- Sleep Mode
- Suspend Mode
- Off Mode
o Independent programmable timers for power saving modes
o Independent programmable timers for LCD and backlight control
o Ten individual power control outputs:
- Three for LCD power
- Seven general purpose for peripherals
o Two to four low battery warning monitors
o Multiple power on sources from Suspend/Off Mode:
- Push-Button
- Real-time clock alarm
- Modem ring
o AC power monitoring to disable PMU function
o Suspend Mode refresh options:
none, CAS-before-RAS, Self-Refresh
o Leakage control of outputs during Suspend Mode
o Wide range of LCD panel power-up/-down sequencing
o Ten general purpose I/O ports; eight with additional I/O
features:
- One programmable blinking I/O
- Two optional low battery inputs
o Watchdog timer to turn-off system power if low battery NMI
is not serviced
o Programmable interrupt generation on:
- PMU power mode
- Low battery warning
- External input
- LCD panel timer
- Reschedule Suspend Mode Interrupt by BIOS
- Activity detection
o Generated interrupt selectable as IROx, NMI, or SMI
o Controls SCAMP I or SCAMP II (VL82C310 or VL82C316)
-SLEEP pin
o Real-time clock alarm IRQ output pin for SCAMP 1 Controller
o 1.5-micron CMOS Technology
o 100-lead (thin) metric quad flat pack (MQFP)
**VL82C380 Single chip 386DX PC/AT Controller +on-chip cache ?...
**VL82C325 VL82C386SX System Cache controller ?...
**VL82C335 VL82C386DX System Cache ctrl. [no d.sheet] ?...
**VL82C315A/322A/3216 Kodiak 32-Bit Low-Voltage Chip Set ?...
**VL82C420/144/146 SCAMP IV [no datasheet, some info] c93...
**VL82C480 System/Cache/ISA bus Controller ?...
**VL82C481 System/Cache/ISA bus Controller c92...
**VL82C486 Single-Chip 486, SC486, Controller ?...
**VL82C425 486 Cache controller ?...
**???????? Cheetah 486, PCI [no datasheet] ?...
**VL82C3216 Bus Expanding Controller Cache with write buffer ?...
**VL82C521/522 Lynx/M ?...
**VL82C530 Eagle Ð c95...
**VL82C541/543 Lynx c95...
**VL82C591/593 SuperCore 590 c94...
**VL82C594/596/597 Wildcat c95...
**I/O Chips:
**VL82C106 Combination I/O chip ?...
**VL82C107 SCAMP Combination I/O chip ?...
**VL82C108 TOPCAT Combination I/O chip ?...
**VL82C110 Combination I/O chip ?...
**VL82C113 SCAMP Combination I/O chip ?...
**VL82C114 Combination I/O chip ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
*ZyMOS...
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