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**M1521/23       Aladdin III       50-66MHz                     <Nov96
***Info:
****M1521 System Controller:...
****M1523 PCI-to-ISA Bridge:
The M1523B is a bridge between PCI and ISA bus, providing full PCI and
ISA compatible functions. The M1523B has Integrated System Peripherals
(ISP)   on  chip   and   provides  advanced   features   in  the   DMA
controller. The keyboard controller and IDE Master Controller are also
included in  this chip. Furthermore,  this chip supports  the Advanced
Programmable Interrupt controller (APIC) interface.

One  eight byte  bi-directional line  buffer is  provided  for ISA/DMA
Master  memory read/writes.  One 32-bit  wide posted  write  buffer is
provided for PCI memory write cycles to the ISA bus. Provides a PCI to
ISA IRQ routing table, and level to edge trigger transfer.

The chip provides 2 extra IRQ lines and 1 programmable chip select for
motherboard Plug-and-Play functions. The interrupt lines can be routed
to any of the available ISA interrupts.

The on-chip IDE controller supports two IDE connectors for up to 4 IDE
devices providing an interface for IDE hard disks and CD ROMs. The ATA
bus pins are dedicated to improve the performance of IDE Master.

The  M1523B  supports  Super  Green  for Intel  and  Intel  compatible
CPUs. It  implements programmable hardware events,  software event and
external switches (for suspend/turbo/ring-in). The M1523B provides CPU
clock control (STPCLKJ).  The STPCLKJ can be active  (low) or inactive
(high) in turn by throttling control.

***Configurations:...
***Features:...
**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...
**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...
**HT44          Secondary Cache                                c:Jun92
***Info:...
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