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*_IBM...
*ACC Micro...
*ALD...
*ALi...
**M1439/31/45 486 VLB/PCI/ISA [no datasheet, some info] <May95
***Notes:...
***Configurations:...
**M1489/87 FinALi-486 PCI Chipset <Feb95
***Info:...
***Configurations:...
***Features:...
**M???? Genie, Quad Pentium [no datasheet, some info] c95...
**M1451/49 Aladdin (Pentium) [no datasheet] ?...
**M1511/12/13 Aladdin II (Pentium) [no datasheet, some info] >Apr95...
**M1521/23 Aladdin III 50-66MHz <Nov96...
**M1531/33/43 Aladdin IV & IV+ 50-83.3MHz <05/28/97...
**M1541/42/33/43 Aladdin V & V+ 50-100MHz ?...
**M1561/43/35D Aladdin 7 ArtX [no datasheet, some info] 11/08/99
***Notes:...
***Info & Features:...
***Configurations:...
**M6117 386SX Single Chip PC <97...
**
**Support Chips:
**M1535/D South Bridge ?...
**
**May not exist:...
**Later Chipsets:...
**Other:...
*AMD . . . . . . . [no datasheets, some info]...
*Chips & Technologies...
**CS8231 TURBO CACHE-BASED 386/AT (82C301/307/303/304/305/306) c86
***Info:...
***Configurations:...
***Features:...
**CS8232 CMOS 386/AT (82C301/302/303/304/305/306) c86...
**CS8233 PEAK/386 AT (Cached) (82C311/82C315/82C316) c:Dec90...
**CS8236 386/AT (82C301/2/3/4/5/6/206) c86...
**CS8237 TURBO CACHE-BASED 386/AT (82C301/7/3/4/5/6/206) c86...
**CS8238 CHIPS/280 & 281 (386 MCA)(82C321/322/325/223/226) c:Aug89...
**CS82310 PEAK/DM 386 AT (82C351/82C355/82C356) c91...
**CS8281 NEATsx (386SX) (82C811/812/215/206) c:Dec89...
**CS8283 LeAPset-sx (82C841/82C242/82C636) c:Mar90...
**CS8285 PEAKsx (82C836/82C835) c91...
**CS8288 CHIPSlite-sx (82C836/82C641/82C835) c?...
**CS4000 WinCHIPS (64200/84021/84025) c92...
**CS4021 ISA/486 (84021/84025) c92...
**CS4031 CHIPSet (84031/84035) 5/10/93...
**CS4041/5 CHIPSet (84041/84045) 2/10/95...
**CB8291 ELEAT [no datasheet] c90...
**CB8295 ELEATsx [no datasheet] c90
assumed to be sx variant of of ELEAT
**82C100 IBM PS/2 Model 30/Super XT ?...
**82C110 IBM PS/2 Model 30/Super XT ?...
**82C235 Single Chip AT (SCAT) c89...
**82C836 Single Chip 386sx (SCATsx) <91...
**F8680/A PC/CHIP Single-Chip PC c93...
**
**Support Chips:
**64200 (Wingine) High Performance 'Windows Engine' c:Oct91...
**82C206 Integrated Peripheral Controller c86...
**82C601/A Single Chip Peripheral Controller <08/30/90...
**82C607 Multifunction Controller <Jun88
***Info:...
***Versions:...
***Features:...
**82C710 Universal Peripheral Controller c:Aug90
***Info:...
***Versions:...
***Features:...
**82C711 Universal Peripheral Controller II c:Jan91...
**82C712 Universal Peripheral Controller II c:Jan91...
**82C721 Universal Peripheral Controller III c:May93
***Info:...
***Versions:...
***Features:...
**82C735 I/O Peripheral Controller With Printgine c:Jul93...
**82C835 Single CHIP 386sx AT Cache Controller c:Apr91...
**F87000 Multi-Mode Peripheral Chip 11/23/93
***Info:...
***Versions:...
***Features:...
**Other:...
**Disk:...
**Video:...
*Contaq . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
**66x8 VIA clones [no datasheet] ?
***Notes:...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel
**IBM PC/XT/AT Chip Sets...
**82230/82231 High Integration AT-Compatible Chip Set(ZyMOS) c:Aug88...
**82310 Micro Channel Compatible Peripheral Chip Set 04/21/88...
**82311 High Integration MCA Compatible Perip. Chip Set 11/14/88...
**82320 MCA compatible Chipset [no datasheet] 04/10/89...
**82340DX Chip Set (VLSI) (82346/82345/82355) 01/08/90...
**82340SX Chip Set (VLSI) (82343/82344) 01/25/89...
**82350 EISA Chip Set 07/10/89...
**82350DT EISA Chip Set 04/22/91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82420TX/ZX PCIset (for 486) TX (Saturn), ZX (Saturn II) c:Nov92...
**82420EX PCIset (for 486) EX (Aries) (82425EX/82426EX) <Dec94...
**82430LX PCIset (Pentium) LX (Mercury) (82433LX/82434LX) 03/22/93...
**82430NX PCIset (Pentium) NX (Neptune) (82433NX/82434NX) Mar94...
**82430FX PCIset (Pentium) FX (Triton I) (82437FX/82438FX)01/31/95...
**82430MX PCIset (Pentium) MX (Mobile Triton)(82437/438MX)11/01/95...
**82430HX PCIset (Pentium) HX (Triton II) (82439HX) 02/12/96...
**82430VX PCIset (Pentium) VX (Triton II) (82437VX/82438) 02/12/96...
**82430TX PCIset (Pentium) TX (Triton II) (82439TX) 02/17/97...
**82450KX/GX PCIset (Pentium Pro) KX/GX (Mars/Orion) 11/01/95...
**
**Support Chips:
**82091AA Advanced Interface Peripheral (AIP) c93...
**8289 Bus Arbiter (808x) c79...
**82289 Bus Arbiter for iAPX 286 Processor Family c83
***Info:...
***Info:...
***Versions:...
***Features:...
**82258 Advanced Direct Memory Access Coprocessor(ADMA) 01/01/84...
**82335 High-Integration Interface Device For 386SX c:Nov88...
**82360SL I/O Subsystem 10/05/90...
**82370 Integrated System Peripheral (for 82376) c:Oct88...
**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
***Notes:...
***Info:...
***Versions:...
***Features:...
**82395SX Smart Cache 12/17/90...
**82396SX Smart Cache 12/17/90
***Notes:...
***Info:...
***Versions:...
***Features:...
**82485 Turbo Cache (and 485Turbocache) c90...
**82489DX Advanced Programmable Interrupt Controller 10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82497/492 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82498/493 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**
**Later chipsets (basic spec):
**440 series:...
***440FX (Natoma) 05/06/96...
***440LX (Balboa) 08/27/97...
***440BX (Seattle) c:Apr'98...
***440DX (?) c:?...
***440EX (?) c:Apr'98...
***440GX (Marlinespike) 06/29/98...
***440ZX & 440ZX-66 (?) 01/04/99...
***440ZX-M (?) 05/17/99...
***440MX (Banister) 05/17/99...
**450NX (?) 06/29/98:...
**????? (Profusion) c:99...
**800 series...
***810 (Whitney) 04/26/99...
***810L (Whitney) 04/26/99...
***810-DC100 (Whitney) 04/26/99...
***810e (Whitney) 09/27/99...
***810e2 (Whitney) 01/03/01...
***815 (Solano) 06/19/00...
***815e (Solano-2) 06/19/00...
***815em (Solano-?) 10/23/00...
***815ep (Solano-3) c:Nov'00...
***815p (Solano-3) c:Mar'01...
***815g (Solano-3) c:Sep'01...
***815eg (Solano-3) c:Sep'01...
***820 (Camino) 11/15/99...
***820e (Camino-2) 06/05/00...
***830M (Almador) 07/30/01...
***830MP (Almador) 07/30/01...
***830MG (Almador) 07/30/01...
***840 (Carmel) 10/25/99...
***845 (Brookdale) 09/10/01...
***845MP (Brookdale-M) 03/04/02...
***845MZ (Brookdale-M) 03/04/02...
***845E (Brookdale-E) 05/20/02...
***845G (Brookdale-G) 05/20/02...
***845GL (Brookdale-GL) 05/20/02...
***845GE (Brookdale-GE) 10/07/02...
***845PE (Brookdale-PE) 10/07/02...
***845GV (Brookdale-GV) 10/07/02...
***848P (Breeds Hill) c:Aug'03...
***850 (Tehama) 11/20/00...
***850E (Tehama-E) 05/06/02...
***852GM (Montara-GM) 01/14/03...
***852GMV (Montara-GM) ???...
***852PM (Montara-GM) 06/11/03...
***852GME (Montara-GM) 06/11/03...
***854 (?) 04/11/05...
***855GM (Montara-GM) 03/12/03...
***855GME (Montara-GM) 03/12/03...
***855PM (Odem) 03/12/03...
***860 (Colusa) 05/21/01...
***865G (Springdale) 05/21/03...
***865PE (Springdale-PE) 05/21/03...
***865P (Springdale-P) 05/21/03...
***865GV (Springdale-GV) c:Sep'03...
***875P (Canterwood) 04/14/03...
*Headland/G2...
**Notes:...
**GC101/102 12/16MHz PC/AT Compatible Chip Set c:Feb88...
***Info:...
***Configurations:...
***Features:...
**GC101/102/103 12/16MHz PC/AT Compatible Chip Set + EMS 4.0 c:Jul89...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**GCK113 80386 AT Compatible Chip Set c:oct89...
***Info:...
***Configurations:...
***Features:...
**GCK181 Universal PS/2 Chip Set c:Mar89...
***Info:...
***Configurations:...
***Features:...
**HT11 Single 286 AT Chip [no datasheet] <Aug90...
***Notes:...
**HT12/+/A Single 286 AT Chip with EMS support c:Aug90...
***Info:...
***Configurations:...
***Features:...
**HT18 80386SX Single Chip c:Sep91...
***Info:...
***Configurations:...
***Features:...
**HT21 386SX/286 Single Chip (20 MHz) c:Aug91...
***Info:...
***Configurations:...
***Features:...
**HT22 386SX/286 Single Chip (25 MHz) c:Sep91...
***Info:...
***Configurations:...
***Features:...
**HT25 3-volt Core Logic for 386SX c:Dec92...
***Info:...
***Configurations:...
***Features:...
**HT35 Single-Chip Peripheral Controller [partial info] ?...
***Notes:...
**HTK320 386DX Chip Set c:Sep91...
***Info:...
***Configurations:...
***Features:...
**HTK340 "Shasta" 486 Chip Set c:Jun92...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**Support Chips:
**HT44 Secondary Cache c:Jun92...
***Info:...
***Versions:...
***Features:...
**Other:...
*HMC (Hulon Microelectronics)...
**HMC82C206 Integrated Peripherals Controller (10MHz C&T 82c206) ?...
***Info:...
***Versions:...
***Features...
*Logicstar...
**SL600X PC / AT Compatible Chipset (10/12MHz) <Jul87...
***Info:...
***Configurations:...
***Features:...
**Support Chips:
**SL6012 Memory Mapper for PC-AT (74LS612 compatible) <Jul87...
***Info:...
***Versions:...
***Features:...
**SL9010 System Controller (80286/80386SX/DX, 16/20/25MHz) <oct88...
***Info:...
***Versions:...
***Features:...
**SL9020 Data Controller <oct88...
***Info:...
***Versions:...
***Features:...
**SL9025 Address Controller <oct88...
***Info:...
***Versions:...
***Features:...
**SL9090 Universal PC/AT Clock Chip <oct88...
***Info:...
***Versions:...
***Features:...
**SL9250 Page Mode Memory Controller (16/20MHz 8MB Max) <oct88
***Info:...
***Versions:...
***Features:...
**SL9350 Page Mode Memory Controller (16/20/25MHz 16MB Max) <oct88...
**Other:...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**85C360 ISA 386DX Single Chip chipset [no datasheet] ?
***Notes:...
**85C401/402 ISA 486DX/SX Cache chipset [no datasheet] ?...
**85C406/5/411/420/431 EISA 386/486 Chipset [no datasheet] c91...
**85C460 ISA 386DX/486 Single Chip [no datasheet] ?
**85C461 ISA 386DX/486 Single Chip [no datasheet] ?...
**85C471/407 Green PC ISA-VLB 486 Single Chip <94
***Info:...
***Configurations:...
***Features:...
**85C496/497 486-VIP 486 Green PC VESA/ISA/PCI Chipset <95
***Info:...
***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
***Info:...
***Versions:...
***Features:...
**5501/5502/5503 Pentium/P54C PCI/ISA Chipset <04/02/95
***Info:...
***Configurations:...
***Features:...
**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
***Info:...
***Configurations:...
***Features:...
**5597/5598 (Jedi) Pentium PCI/ISA Chipset <04/15/97...
**530/5595 (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98
***Info:...
***Configurations:...
***Features:...
**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] ?
***Notes:...
**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)...
**SN74LS610/2 IBM AT: SN74LS610, SN74LS612 Memory Mappers <84
***Notes:...
***Info:...
***Versions:...
***Features:...
**TACT82000 3-Chip 286 [no datasheet] c89...
**TACT82411 Snake Single-Chip AT Controller c90
***Notes:...
***Info:...
***Configurations:...
***Features:...
**TACT82S411 Snake+ Single-Chip AT Controller [no datasheet] c91...
**TACT83000 AT 'Tiger' Chip Set (386) c89...
**TACT84500 AT Chip Set (486, EISA) [no datasheet, some info] c91...
**Other:...
*UMC...
**UM82152 Cache Controller (AUStek A38152 clone) <91
***Info:...
***Versions:...
***Features:...
**UM82C852 Multi I/O For XT <91...
***Info:...
***Versions:...
***Features:...
**UM82C206 Integrated Peripheral Controller <91...
***Info:...
***Versions:...
***Features:...
**UM82c45x Serial/Parallel chips ?...
***Notes:...
**Other chips:...
***Video:...
***Disk:...
***Peripheral:...
***Other:...
*Unresearched:...
**A - D...
***Appian Technology...
***Atmel...
***Biostar...
***Citygate...
***Cyrix...
***Other...
**E - G...
***Evergreen?...
***Other...
**H - I...
***Hint...
***Other...
**J - R...
***Micro Integration...
***Micron...
***Oak...
***Other:...
**S...
***Shasta...
***SARC...
***ServerWorks (Reliance Computer Corporation)...
***Sun Electronics (SUNTAC) ...
***Syslogic...
***Other...
**T - Z...
***Toshiba ...
***UniChip ...
***USA...
***Other...
*VIA
**SL9XXX FlexSet family General information...
**SL9011 System Controller (80286/80386SX/DX, 16/20/25MHz) <Jan90...
**SL9020 Data Controller <Jan90...
**SL9025 Address Controller <Jan90...
**SL9030 Integrated Peripheral Controller <Jan90...
**SL9090/A Universal PC/AT Clock Chip <oct88...
**SL9095 Power Management Unit ?
***Info:...
***Versions:...
***Features:...
**SL9151 80286 Page Interleave Memory Controller (16-25MHz) ?...
**SL9250 80386SX Page Mode Memory Controller (16/20MHz 8MB) ?
***Info:...
***Versions:...
***Features:...
**SL9251 80386SX Page Interleave Memory Controller <04/13/90...
**SL9252 80386SX System and Memory Controller <06/12/90...
**SL9350 80386DX Page Mode Memory Controller (16-25MHz 16MB) ?
***Info:...
***Versions:...
***Features:...
**SL9351 80386DX Page Interleave Memory Controller (33MHz) ?
***Info:...
***Versions:...
***Features:...
**SL9352 80386DX System and Memory Controller <06/12/90...
**SLXXXX Other chips...
**
**VT82C470 "Jupiter", Chip Set (w/o cache) 386 [no datasheet] ?
**VT82C475 "Jupiter", Chip Set (w/cache) 386 [no datasheet] ?
**VT82C486/2/3 "GMC chipset" [no datasheet, some info] ?
***Notes:...
***Info:...
***Configurations:...
**VT82C495/480 "Venus" Chip Set [no datasheet] ?
**VT82C495/491 ? EISA Chip Set [no datasheet, some info] <93...
**VT82C496G Pluto, Green PC 80486 PCI/VL/ISA System <05/30/94...
**VT82C530MV 3.3V Pentium chipset [no datasheet, some info]<05/30/94...
**VT82C570M Apollo Master, Green Pentium/P54C <06/22/95...
**VT82C580VP Apollo VP, Pentium/M1/K5 PCI/ISA System <02/15/96...
**VT82C580VPX Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590 Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT Apollo VP3, Single-Chip for Pentium with AGP <10/03/97
***Info:...
***Configurations:...
***Features:...
**VT82C598MVP Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97
***Notes:...
***Info:...
***Configurations:...
***Features:...
**VT8501 Apollo MVP4,Single-Chip 66-100MHz & AGP <11/04/98...
**VT82C680 Apollo P6, Pentium-Pro Chip Set <08/30/96
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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...
**Other...
*VLSI...
**VL82C325 VL82C386SX System Cache controller ?
***Info:...
***Versions:...
***Features:...
**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
***Basics:...
***Info:
The VL82C481 controller is designed to control 486DX or
486SX/487SX-based ISA bus systems operating at up to 40 MHz. It also
supports 486 family CPUs that contain an integrated write-back cache
(P24T, etc.) The VL82C481 replaces the following devices on the
motherboard:
o Two 82C37A DMA controllers
o Two 82C59A interrupt controllers
o 82C54 timer
o 74LS612 memory mapper
o 82284 clock generator and ready interface
o 82288 bus controller
The following controller blocks are also included on-chip:
o Memory/refresh controller
o Port B and NMI logic
o Bus steering logic
o Turbo Mode control logic
o Parity checking logic
o Parity generation logic
o Writ-back look-aside cache controller
The VL82C481 supports the Weitek 4167 Numeric Coprocessor.
The memory controller logic is capable of accessing up to 64 MB. There
can be up to four banks of 256K, 1M, or 4M DRAMs used in a system. The
VL82C481 can drive two banks without external buffering. Built-in Page
Mode operation and up to two-way interleaving allows the PC designer
to maximize system perform- ance using low-cost DRAMs. Programmable
DRAM timing is provided for RAS# pre- charge, RAs-to-CAS delay, and
CAS# pulse width.
The VL82C481 write-back cache controller logic supports one or two
bank direct map write-back cache with external tag storage. The cache
controller can per- form 2-1-1-1 reads with two banks or 2-2-2-2 reads
with one bank. It can also perform 3-2-2-2 cycle reads for support of
slower SRAMs at higher frequences. The VL82C481 can perform one wait
state writes on cache-hits. An optional zero wait state write mode is
provided for use with fast cache SRAMs. The cachable DRAM range
includes 2 MB up to 64 MB utilizing cache data SRAM sizes of 32 KB
through 1 MB, respectively.
The HITM# input is provided to force the VL82C481 to abort DRAM or
cache cycles when a hit on a dirty line in the CPU write-back cache is
detected. the DRAM or cache cycle is subsequently restarted after the
CPU has written back the dirty data
Shadowing features are supported on 16K boundarys between A0000h and
FFFFFh (640 KB to 1 MB). simultaneous use of shadowed ROM and direct
system board access is possible in a non-overlapping fashion
throughout this memory space. Control over four access options is
provided:
1. Access ROM or slot bus for reads and writes.
2. Access system board DRAM for reads and writes.
3. Access system board DRAM for reads and slot bus for writes.
4. Shadow setup mode. Read ROM of slot bus, write system board DRAM.
Three special programmable address regions are provided. the Fast Bus
Clock Reg- ion allows accesses to certain memory regions at a faster
ISA bus clock rate for fast on-board or off-board devices. A
Non-Cacheable Region and/or a Write-Pro- tected Region may be defined
by a set of six registers that allow memory in the region 640 KB to 1
MB to be marked as non-cacheable and/or write-protected in increments
of 16 KB. A further set of registers allows a memory range anywhere in
the first 64 MB of memory to be marked as a DRAM region, an ISA bus
region, or a local bus region, either cachable or non-cacheable in
increments of 2 KB. 64 KB, or 1 MB.
Further support for devices that reside on the local bus is provided
through use of the LDEV# (Local Bus Access) input, which deselects the
VL82C481 during CPU cycles and causes the VL82C481 to generate VL-Bus
memory cycles when active dur- ing DMA and Master Mode cycles. Also, a
memory range anywhere in the first 64 MB of memory can be programmed
via the internal mapping registers. This allows the VL82C481 to access
a VL-Bus device during DMA or Master Mode transfers, and de- select
the VL82C481 during CPU cycles.
The VL82C481 handles system board refresh directly ans also controls
the timing of slot bus refresh. Refresh may be performed in three
different modes: synchro- nous, Asynchronous or Decoupled Mode. In the
Synchronous Mode, slot bus and on- board DRAM refresh cycles proceed
simultaneously with all memory cycles held until both have
completed. The Asynchronous Mode allows in- and off-board refre- shes
to be initiated simultaneously, but to complete asynchronously,
allowing earlier access to DRAM. In the Decoupled Mode, a separate
refresh counter is used for slot bus refresh, allowing on-board DRAM
and system refreshes to proceed in- dependently, with DRAM refreshes
initiated during bus idle cycles. CAS-before-RAS refresh is also
supported. Refreshes are staggered to minimize power supply loading
and attenuate noise on the VDD and VSS pins. The VL82C481 supports the
ISA bus standard refresh period of 15.625 us as well as 125 us.
The interrupt controller logic consists of two 82C59A megacells with
eight inter- rupt request lines each. The two megacells are cascaded
internally and three of the interrupt request inputs are connected to
internal circuitry, sa a total of 13 external interrupt request lines
are available. These 13 interrupt request lines plus the Weitek
interrupt request line, the ten-channel check line, and the
Turbo/Non-Turbo line are scanned in through one pin on the
VL82C481. Two external 74LS166s are required for scanning in these 16
signals.
The interval timer includes one 82C54 counter/timer megacell. the
counter/timer has three independent 16-bit counters and six
programmable counter modes.
the two DMA controllers are 82C37A compatible. Each controls data
transfers bet- ween an I/O channel and on- or off-board memory. The
DMA controllers can transfer data over the full 64 MB range
available. Internal latches are provided for latc- hing the middle
address bits output by the 82C37A megacells on the data bus. The
74LS612 memory mappers are integrated to generate the upper address
bits.
The VL82C481 can be programmed for asynchronous or synchronous
operation of the ISA bus.
The VL82C481 also performs all the data buffer control functions
required for a 486-based ISA bus system. Under the control of the CPU,
the VL82C481 routes data to and from the CPU's local D bus, the
internal XD bus, and the slots (SD bus). During CPU ISA bus reads,
the data is latched for synchronization with the CPU. Parity is
checked for D bus DRAM read operations. On power-on default, the chip
does not generate parity for CPU writes to DRAM, but does generate
cache write- back cycles. However, a mode is provided in which the
VL82C481 will generate parity during either CPU writes or VL master
writes. Even parity is generated and checked.
***differences to the VL82C480:...
***Configurations:...
***Features:...
**VL82C486 Single-Chip 486, SC486, Controller ?...
**VL82C425 486 Cache controller ?...
**???????? Cheetah 486, PCI [no datasheet] ?...
**VL82C3216 Bus Expanding Controller Cache with write buffer ?
***Info:...
***Versions:...
***Features:...
**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...
**FE6500 CPU Core Logic for PS/2 Model 70/80 Compatibles c:88
***Notes:...
***Info:...
***Configurations:...
***Features:...
**WD6400SX/LP CPU Core Logic for PS/2 386SX Compatibles <90...
**WD6500 CPU Core Logic for PS/2 386DX/486 Compatible <90...
**WD7600A/LP/LV System Chip Set for 80286 or 80386SX <11/25/91...
**WD7700/LP System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD7855 System controller for 80386SX <09/25/92...
**WD7900/LP/LV System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD8110 System controller for 80386DX/486 <11/30/93...
**
**Support Chips:
**WD76C20x Floppy, RTC, IDE and Support Logic Device <11/25/91...
**WD76C30x Perip. Ctrl, Interrupt Multiplex, and Clock Gen <11/18/91...
**WD7615 Desktop Buffer Manager <04/15/92...
**WD7625 Desktop Buffer Manager <10/01/92...
**WD8120LV Super I/O [no datasheet] ?
**Other Chips:...
*Winbond...
**W83977EF WINBOND I/O (Multi I/O) <98
***Info:...
***Versions:...
***Features:...
**W83977ATF WINBOND I/O (Multi I/O) <98...
**
**Disk Controller:
**W83759/A/F/AF Advanced VL-IDE Disk Controller <96
***Notes:...
***Info:...
***Versions:...
***Features:...
**W83769 Local Bus IDE Solution <94
***Info:...
***Versions:...
***Features:...
**
**UARTS:
**W86C250A UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter <Jul89...
**W86C451 I/O controller for IBM PC/AT/XT <Jul89...
**W86C452 I/O controller for IBM PC/AT Jul89...
**W86C456 I/O controller [no datasheet] ?
**W860551/P UART with FIFO and Printer Port Controller <94...
**
**Other:...
*ZyMOS...
*General Sources:...
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