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**M1531/33/43    Aladdin IV & IV+  50-83.3MHz                <05/28/97
***Info:
****M1531 CPU-to-PCI bridge, Memory, Cache and Buffer Controller:
Aladdin-IV is  the succeeding  generation chipset of  Aladdin-III from
Acer Labs. It maintains the best system architecture (2-chip solution)
to achieve  the best  system performance with  the lowest  system cost
(TTL  free).   Aladdin-IV  consists  of  two BGA  chips  to  give  the
586-class system a complete solution with most up-to-date features and
architecture for  the most  engaging multimedia/multithreading  OS and
software applications.  It utilizes the  modern BGA package to improve
the  AC characterization,  resolves  system bottleneck  and makes  the
system manufacturing easier.

M1531B  is the  successor  of  M1531. The  major  differences are  the
64-Mbit  SDRAM support  and  more cacheable  region  support in  SDRAM
configuration.   Please  refer to  the  application  note in  Appendix
A [see datasheet].

M1531B includes the higher CPU bus frequency (up to 83.3MHz) interface
for  the incoming  Cyrix  M2 and  AMD  K6, PBSRAM  and L2  controller,
internal MESI tag bits (8K*2)  to reduce cost and enhance performance,
high performance FPM/EDO/SDRAM DRAM  controller, PCI 2.1 compliant bus
interface, smart  deep buffer design for  CPU-to-DRAM, CPU-to-PCI, and
PCI-to-DRAM  to achieve  the  best system  performance,  and also  the
highly  efficient PCI  fair  arbiter. M1531B  also  provides the  most
flexible  32/64-bit memory  bus interface  for the  best  DRAM upgrade
ability and ECC/Parity design to enhance the system reliability.  With
the concurrent bus design, PCI-to-PCI access can run concurrently with
CPU-to-L2   and  CPU-to-DRAM  access,   PCI-to-DRAM  access   can  run
concurrently  with CPU-to-L2  access. M1531B  also supports  the snoop
ahead  feature  to  achieve  the  PCI  master  full  bandwidth  access
(133Mbytes).  M1531B  also  provides  the  enhanced  power  management
features including  ACPI support,  suspend DRAM refresh,  and internal
chip power control to support the Microsoft’s On Now technology OS.

M1533  provides  the  best  power management  system  solution.  M1533
integrates  ACPI  support, deep  green  function, 2-channel  dedicated
Ultra-33   IDE  master  controller,   2-port  USB   controller,  SMBus
controller, and PS2 Keyboard/Mouse controller.

M1543  provides the  best desktop  system solution.   M1543 integrates
ACPI support, green function,  2-channel dedicated Ultra-33 IDE Master
controller,  2-port USB controller,  SMBus controller,  PS/2 Keyboard/
Mouse controller and  the Super I/O (Floppy Disk  Controller, 2 serial
port/1 parallel port) support.

In the  following diagram [see  datasheet], ALADDIN-IV gives  a highly
integrated system  solution and a most  up-to-date architecture, which
provides  the best  cost/performance system  solution for  Desktop and
also for Notebook vendors.

****M1533 PCI-to-ISA Bus Bridge:...
***Configurations:...
***Features:...
**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...
**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...
**UM8890       Pentium chipset [no datasheet]                        ?
***Notes:...
***Configurations:...
**
**Support Chips:
**UM82152      Cache Controller (AUStek A38152 clone)              <91...
**UM82C852     Multi I/O For XT                                    <91...
**UM82C206     Integrated Peripheral Controller                    <91...
**UM82c45x     Serial/Parallel chips                                 ?...
**Other chips:...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...