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*_IBM...
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**M1207          286 Single Chip                  [no datasheet]     ?
***Notes:...
**M1217/M1209    386SX/SLC Single Chip (40MHz)    [no datasheet]   c91...
**M1219          386DX/486 ISA Cache? Single Chip [no datasheet]     ?
**M1419          386DX/486 ISA Cache  Single Chip [no datasheet]   c91
**Ml429/31/35    486 VLB/PCI/ISA      [no datasheet, some info] cOct93...
**M1439/31/45    486 VLB/PCI/ISA      [no datasheet, some info] <May95...
**M1489/87       FinALi-486 PCI Chipset                         <Feb95...
**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...
**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...
*Contaq  . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**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...
**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...
**VT82C580VPX  Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97
***Notes:...
***Info:
The VT82C580VPX  Apollo-VPX is a high  performance, cost-effective and
energy efficient chip set for  implementation of PCI / ISA desktop and
notebook   personal   computer   systems   based   on   64-bit   P54C/
Pentium/K5/K6/M1 super-scalar processors.   The CPU / cache connection
is  supported  using  an  "asynchronous"  interface up  to  75Mhz  CPU
external bus speed  (with CPU internal speed up  to 200Mhz and above),
with  CPUs   such  as  the   "P200+"  processors  from  Cyrix   /  IBM
Microelectronics.  The  "asynchronous" interface allows  the processor
external  bus  frequency  to  be  increased above  66MHz  while  still
allowing the PCI  bus to run at the specified  top frequency of 33MHz.
The  chipset also  supports CPU  external bus  speeds up  to  66MHz in
"synchronous" mode, so may also  be used in boards designed around the
popular VT82C580VP (Apollo VP)  chipset.  The 66MHz external bus speed
is used primarily for Intel and AMD processors.  The CPU, DRAM and PCI
bus are all  independently powered so that each of the  bus can be run
at 3.3v or 5v, independently.  The ISA bus always runs at 5v.

The  VT82C580VPX   chip  set   consists  of  the   VT82C585VPX  system
controller, the VT82C586B PCI to  ISA bridge, and two instances of the
VT82C587VP  data  buffers.   The  VT82C585VPX is  the  only  different
component in  a VPX-based system from  the chips used in  an Apollo VP
system: the same VT82C586B South Bridge  chip may be used with all VIA
North  Bridge chips  (Pentium  and PentiumPro-based  designs) and  the
VT82C587VP  Data Buffer  is the  same  chip as  is used  in Apollo  VP
designs.

The CPU bus is minimally loaded with only the CPU, secondary cache and
the chip  set.  The VT82C587VP data  buffers isolate the  CPU bus from
the DRAM and PCI bus so  that CPU and cache operation may run reliably
at  the   high  frequencies  demanded  by   today's  processors.   The
VT82C585VPX contains multiple deep FIFOs to allow efficient concurrent
operation  and DRAM  utilization.   The VT82C586B  PCI  to ISA  bridge
includes  integrated  206-style  IPC  (DMA, interrupt  controller  and
timer),  integrated  keyboard   controller  with  PS2  mouse  support,
integrated DS12885 style  real time clock with extended  256 byte CMOS
RAM,  ACPI-compatible Power  Management  subsystem, integrated  master
mode enhanced IDE / UltraDMA-33  disk controller with full scatter and
gather capability, and integrated USB (universal serial bus) interface
with  root hub  and two  function ports  with built-in  physical layer
transceivers  (refer   to  the  separate  VT82C586B   Data  Sheet  for
additional  information).  A  complete main  board can  be implemented
with only six TTLs.  Refer to  Figure 1 [see datasheet] for the system
block diagram.
***Configurations:...
***Features:...
**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...
**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...
**Other...
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