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*ACC Micro...
**ACC82021   Turbo PC/AT Chip Set (286/386SX 25MHz Max)            >88
***Notes:
The datasheet  for this chip set  only gives the general  section. The
2121  chip  has  a  separate  datasheet.  The  2000  and  2220  chip's
information is sourced from the ACC82020 datasheet.

The main difference between the  ACC82020 and the ACC82021 is that the
ACC82021  uses the  ACC2121  System/Memory controller  instead of  the
ACC2120.  

The  ACC2120 chip  lists some  features as  "Available fourth  quarter
1989". It would appear that nearly all the features listed in this way
are now in the ACC2121. Perhaps the ACC2120 chip was never updated and
instead replaced by the ACC2121.

Other features in the general section that differ are:

Differences:
Video BIOS shadowed
Lists Chip select for floppy instead of mouse


***info:...
***Configurations:...
***Features:...
**ACC82300   386 AT Chip Set (386DX)                               c88...
**ACC82C100  Single-Chip PC/XT Systems-Controller                  c90...
**ACC83000   Model 30 Integrated Chip Set (MCA)                    c88...
**ACC85000/A Model 50/60 Chipset (MCA)                             c88...
**ACC1000    Turbo PC/XT Integrated Bus and Peripheral Ctrl.  04/02/88...
**ACC2036    Single Chip Solution 2036 (286/386SX)              <Jul92...
**ACC2046/ST 486DX/486SX/386DX Single Chip AT                   <Jul92...
**ACC2048    WB 486 Notebook/Embedded Single Chip [no datasheet]     ?...
**ACC2051/NT PCI Single Chip Solution for Notebook Applications    c96...
**ACC2056    ?Pentium 3.3V Notebook               [no datasheet]<Jan96...
**ACC2057    PCI Notebook/Embedded Single Chip    [no datasheet]<Aug96...
**ACC2066NT  486 Notebook/Embedded Single Chip    [no datasheet]     ?...
**ACC2086    486 VL-based System Super Chip Soluti[no datasheet]     ?...
**ACC2087    Enhanced Super Chip (486 Single Chip)              <Aug96
***Info:...
***Configurations:...
***Features:
o   Supports Intel iDX4, AMD AM486, Cyrix 5x86, TI 486s, and IBM Blue 
    Lightning microprocessor with operation up to 50 MHz
o   3.3V / 5.0V mixed voltage system design
o   Level 1 Write Back Cache
o   Level 2 Cache Controller
    - Support either write back or write through implementation
    - Up to 2 MB in cache size
o   High Performance DRAM Controller
    - Supports four banks of 32-bit DRAM, Fast Page Mode only, 
      allowing up to 64 MB memory
o   Integrated Peripheral Controller: 2 x 8237, 2 x 8259, 1 x 8254, 
    1 x 74612
o   Integrated Floppy Disk Controller supports two floppy disk drives
o   Supports one IDE interface
o   Supports two high speed 16C550 compatible UARTs with 16 Byte FIFOs
o   Supports one bi-directional Parallel port with ECP mode
o   Support PPM mode where Floppy Disk Drive can be used on Parallel 
    Port
o   PS/2 compatible Keyboard Controller and Mouse
o   Power Management Control
    - Power-On Suspend
    - Power-Off Suspend
    - Doze / Idle Detection
    - Suspend / resume Button
    - APM support
    - SMM / SMI
    - Stop Clock Protocol
    - Battery monitoring signal and dedicated low-battery warning 
      alarm
o   Supports Flash EPROM
o   Local Bus IDE
o   Fast reset / Fast gate A20 (Port 92)
o   256-pin PQFP device
**ACC2089    486 PCI-based System Super Chip      [no datasheet]     ?...
**ACC2168/GT 32-bit 486 Green System Single Chip  [no datasheet]     ?...
**ACC2178A   32-bit 486 Green System Single Chip  [no datasheet]     ?...
**ACC2268    ?486                                 [no datasheet]     ?...
**ACC????    Maple/Maple-133 486-System-On-Chip   [no datasheet]     ?...
**
**Support Chips:
**ACC2016    Buffer and MUX Logic                                  c96...
**ACC2020    Power Management Chip                                 c92...
**ACC5500    Multifunction I/O Control Chip for PS2 Model 50/60    c88...
**
**Other chips...
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*AMD . . . . . . . [no datasheets, some info]...
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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...
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