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**440 series:
***440FX (Natoma) 05/06/96...
***440LX (Balboa) 08/27/97...
***440BX (Seattle) c:Apr'98...
***440DX (?) c:?...
***440EX (?) c:Apr'98...
***440GX (Marlinespike) 06/29/98...
***440ZX & 440ZX-66 (?) 01/04/99...
***440ZX-M (?) 05/17/99...
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**????? (Profusion) c:99...
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*UMC...
**UM82C088 PC/XT Integration Chip <91
***Info:...
***Configurations:...
***Features:...
**UM82C230 286AT MORTAR Chip Set <91...
**UM82C210 386SX/286 AT Chip Set <91...
**UM82C3xx Twinstar & UM82C336F/N & UM82C39x [no datasheet] ?...
**UM82C380 386 HEAT PC/AT Chip Set <91...
**UM82C480 386/486 PC Chip Set c91
***Info:
The UMC82C480 is a highly integrated, IBM PC/AT compatible chip set
for high performance 80386/80486 based personal computer systems.
Built with exquisite [yes it really says that] cache controller in
advanced 1.0um CMOS technology, UM82C481 (Integrated Memory
Controller, IMC), UM82C482 (Integrated System Controller, ISC), with
UM82C206 (Integrated Peripheral Controller, IPC), and limited counts
of commercial parts constitute a low cost, highly reliable, full
advanced feature personal computer system.
The UM82C482, Integrated System Controller (ISC), is part of UMC's
high performance 80386/80486 PC/AT chip set. It contains AT bus
control logic, data bus conversion logic, CPU reset logic, clock
generation for CPU, keyboard and timer, DMA/refresh logic and
peripheral interface logic. Incorporated with UM82C481, integrated
Memory Controller (IMC), and UM82C206, Integrated Peripheral
Controller (IPC), ISC provides system control functions for overall
PC/AT computer system.
The UM82C481, Integrated Memory Controller (IMC), is part of UMC's
high performance 80386/80486 PC/AT chip set. It contains sophisticated
direct-mapped cache controller with write back operation, and fast
page mode DRAM controller. Incorporated with UM82C482, Integrated
System Controller (ISC), and UM82C206, Integrated Peripheral
Controller (IPC), IMC provides main memory management function for the
PC/AT computer system.
***Configurations:
UM82C482 Integrated System Controller (ISC)
UM82C481 Integrated Memory Controller (IMC)
and:
UM82C206 Integrated Peripheral Controller, IPC
Known Versions:
UM82C481A
UM82C481BF
UM82C482A
UM82C482AF
No idea how these differ to the original.
***Features:
o 100% IBM PC/AT compatible
o Supports 80386 CPU running at 25/33/40 MHz
o Supports 80486 CPU running at 25/33/40/50 MHz in 1x clock
o Supports Intel 80387 / Weitek 3167 / Weitek 4167 Floating Point
Coprocessors
o Built-in cache controller:
- Direct-mapped organization with write-back operation
- 0 wait state for cache hit
- Flexible cache size: 32/64/128/256/512/1024 KB
- Hidden DRAM refresh to boost system performance
- built-in registers to support three independent non-cacheable
regions
- Support cache line fill as well as 80486 burst mode
- Support Automatic Memory Size Detection
o Sophisticated DRAM controller:
- Supports Fast/Standard page mode
- Supports 4 banks CPU speed DRAM with memory size up to 64MB
- Supports mixable 256Kx9, 1Mx9, 4Mx9 DRAM modules
- Programmable DRAM wait states
- Supports 256KB or 384KB (A to F segments of first 1MB)
relocation to the top of DRAM memory
o Supports sophisticated Shadow RAM for video and system BIOS (C, D,
E, F segments)
o Supports first GATE A20 and fasy CPU RESET to optimize OS/2
operations
o Synchronous AT bus clock with programmable clock (divided by 2, 3,
4, 5, 6)
o Programmable CPU clock (divided by 1, 2, 3, 4)
o Support 256KB/512KB/1MB EPROMs with single or double EPROM BIOS
configuration
**UM82C493/491 ??????????????? [no datasheet] ?...
**UM8498/8496 486 VL Chipset "Super Energy Star Green"[no dsheet]c94...
**UM8881/8886 HB4 PCI Chipset "Super Energy Star Green"[no dsheet]c94...
**UM8890 Pentium chipset [no datasheet] ?...
**
**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:...
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*Winbond...
*ZyMOS...
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