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**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...
**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...
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**SL6012  Memory Mapper for PC-AT (74LS612 compatible)          <Jul87
***Info:
The SL6012 Memory  Mapper is intended for use in  PC-AT design. It can
expand an address bus by 4  bits. In PC-AT applications, 4 bits of the
source  address   are  used  to  select   1  of  16,   eight  bit  map
registers. These registers  are normally programmed (through software)
with the  starting address of each  memory page. The  register data is
output directly for  use as the most significant  bits of the expanded
address bus. The 8 bits from the SL6012 are used along with the unused
source address bits to form the expanded address bus.

As shown  in Table 1  [see datasheet], the  SL6012 has three  modes of
operation; read, write and map. Data may be written into, or read from
the Memory  Mapper when  chip select CSN  is low. The  register select
inputs (RS0 through RS3) select one of the sixteen map registers. When
RWN is  low, data is written  into a register from  the data bus. When
RWN is high  data is output from a Memory Mapper  register to the data
bus.

The map mode of operation is selected when chip select CSN is high. In
this mode, the  register data selected by the  map address inputs (MA0
through  MA3)  will be  available  on  the  map outputs  (MO0  through
MO7).  Note that  the map  registers are  addressed by  either  the RS
inputs or  the MA inputs depending  upon the operating  mode. When MEN
(Map Enable) is low the map  outputs (MO0-MO7) are active. When MEN is
high, the map outputs are at high impedance.

***Versions:...
***Features:...
**SL9010  System Controller (80286/80386SX/DX, 16/20/25MHz)     <oct88...
**SL9020  Data Controller                                       <oct88
***Info:...
***Versions:...
***Features:...
**SL9025  Address Controller                                    <oct88...
**SL9090  Universal PC/AT Clock Chip                            <oct88...
**SL9250  Page Mode Memory Controller (16/20MHz 8MB Max)        <oct88...
**SL9350  Page Mode Memory Controller (16/20/25MHz 16MB Max)    <oct88...
**Other:...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
**Later Chipsets:
Info sourced from the very useful plasma-online.de:
http://www.plasma-online.de/index.html?content=http%3A//www.plasma-online.de/english/identify/picture/pcchips.html

Chipset name   | OEM of                    | used on mainboard
---------------+---------------------------+-----------------------------------------
HX Pro         | ALi M1521/M1523           |  
SX Pro         | SiS 530/5595              | M598
AGP Pro PC-100 | VIA VT82C598AT/VT82C596B  | M577
TX AGP Pro     | SiS 5591/5595/6326        |  
TX Two         | ALi M1531/M1543           | 
TX Pro         | ALi M1531/M1543           | M560, M575
TX Pro II      | SiS 5597/5598             | M571
TX Pro III     | VIA VT82C580VPX/VT82C586B | M573
TX Pro IV      | SiS 5591/5592             | M570
Top Gun        | ALi Aladdin IV+           | M565
VIA GRA        | VIA VT8501/VT82C596B      | M858LMR
VX Pro         | VIA VT82C580VP/VT82C586B  | 	 
VX Pro +       | VIA VT82C580VPX/VT82C586B | 	 
VX Pro II      | UTron / HiNT UT801X       |   		 
VX two         | VIA VT82C580VP/VT82C586B  | Amptron PM-8600A
VX two         | VIA VT82C580VPX/VT82C586B | Amptron PM-8600B
BXToo          | VIA Apollo Pro            | M760V, M761V
BXToo          | VIA VT82C693/VT82C686A    | M767V
BXPro          | SiS 600/5595              | M747
BXCel          | ALi M1621/M1543           | M726, M729
BXpert         | VIA VT82C691/VT82C596     |  
BXTel          | VIA Apollo Pro            | M730
Xcel 2000      | SiS 620/5595              | M741LMRT
Super TX       | SiS 5597/5598             | ASUS SP97-V, SP98-N, Jetway J-TX98R2
Super TX       | ALi M1531/M1543           | 
Super TX       | ALi M1541/M1543           | Biostar M5ALA, M5ALC, Pionex MBD-P5ABx
Super TX3      | SiS 5571                  | 	 
Super TX4 AGP  |                           | 	 
GFXcel         | SiS 630                   | 	 
GFXpro         | ALi M1631/M1535D          |  
T-Bird         | SiS730S                   | M810
---------------+---------------------------+----------------------------------------

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