[Home] [This version is outdated, a new version is here]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...
**??????     "Cougar/Bobcat" 386DX/486DX chipset [no datasheet] cNov91
***Notes:
"ETEQ  Microsystems Inc,  headquartered in  Milpitas,  California, has
developed the  Cougar II  and Bengal chip  sets to support  Intel Corp
iAPX-86 clock  speeds above 50MHz: a hardware  turbo switching feature
has been incorporated into the  Cougar and Bengal 80386 and 80486 chip
sets, and  this enables  users to mix  the type  and the order  of the
DRAMs  in the  system;  also,  they support  a  Weitek Corp  3167/4167
co-processor   without   any   external  programmable   array   logic;
engineering samples of the 50MHz  chip sets are shipping from ETEQ and
production volumes  will begin in the  first quarter of  next year; no
prices. " - 21st November 1991
http://www.cbronline.com/news/eteq_develops_the_cougar_ii_and_bengal_chip_sets/

Since the Bobcat uses some of the same parts it is assumed to be just
a different variation.
***Configurations:...
**??????     "Bengal"  386DX/486 (WriteBack)     [no datasheet] cNov91...
**ET2000     386/486 WB Chipset                                      ?
***Info:...
***Configurations:...
***Features:
o   Process technology used 0.8u CMOS
o   CPUs supported Intel 80486, 80486SX, AMD Am386DX Am486DX, Cyrix 
    486DLC
o   CPU speed supported 16/20/25/33/40/50 MHZ
o   CPU speed supported in 386 system (No external PALS required)
    Intel 80387/ Cyrix / HT/ULSI / WEITEK 3167
o   Coprocessors supported in 486 system (No external PALS required) 
    WEITEK 4167
o   AT clock generation Async / Sync
o   Programmable AT bus clock Yes
o   Hardware / Software turbo switching Yes
o   Page Mode DRAM control Yes
o   Double word interleave control Yes
o   DRAM type supported 256K/1M/4M/16M
o   Mixing DRAMS Yes
o   Concurrent and AT Refresh Yes
o   Shadow RAM range maximum size / block size  256 KB / 64KB
o   Support EISA/ ISA bus compatibility Yes
o   Support Local Bus Yes
o   PQFP package: ETISP - 184, ETCMC, ETEBC, ETEDB -l60
o   Maximum Physical DRAM 256MB
o   Programmable wait states Yes
o   On chip cache controller Yes
o   Support 8kx8 and 8kx9 Tag RAM Yes
o   Cache update scheme Write back
o   Cache organization Direct mapped
o   Data cache size 32KB-1 MB
o   Non-cacheable support Yes
o   Each non-cacheable region size 512KB-32MB
o   Zero wait state cache read hit Yes
o   Zero wait state cache write hit Yes
o   SRAM Burst mode support 2-1-1-1, 2-2-2-2, 3-1-1-1, 3-2-2-2 Yes
o   DRAM Burst mode support Yes
o   External TTL component 11 - 13
o   SRAM speed required @ 50MHz 20ns
o   SRAM speed required @ 40MHZ 20ns
o   SRAM speed required @ 33MHz 20ns
o   SRAM speed required @ 25MHz 35ns
o   AENx generator Yes
o   Fast gate A20 Yes
o   Fast reset Yes

**ET6000     "Cheetah" 486DX/SX Non-Cache System                <Apr92...
**ET9000     "Jaguar" 486 Write Back Cache AT Single Chip       <Jun92...
**ET9800/391 "Firefox" 386SX Write Back chipset [no datasheet]       ?...
**82C390SX   "Panda" S.C. 386SX Direct Mapped Cache [no d.sheet]cFeb92...
**66x8       VIA clones [no datasheet]                               ?...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**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...
*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:...