System Board; Usb Controller; Memory Map; Data Path - IBM ThinkPad A20m Compatibility Manual

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The purpose of this spreadsheet is to provide a guide to the compatibility within and between the ThinkPad A series models.
The spreadsheet contains information that can be used to highlight the compatibilities and differences between ThinkPad models when doing transition planning and/or to build an initial software image.
This package is NOT intended to be a list of the latest levels of the software drivers needed to build an image. Although it is current as it is being created, it will become out of date over time.
For the current list of the levels of the latest software drivers, see the support page on the IBM ThinkPad web site at:

System Board

Intel MMO
System Bus
HDD Interface
I/O Port
BIOS All BIOS are AT-compatible
System BIOS Updates
Model/Sub-model f ixed with FC/01 for all systems

Memory Map

F0000-FFFFF
E0000-EFFFF
D0000-DFFFF
C7FFF-CFFFF
C0000-C7FFF
A0000-BFFFF
Memory

Data Path

Voltage
Technology
Battery
Type
Battery Installation Check Utility
LCD
Docking
SelectaDock I / II /III
ThinkPad Dock
For drivers: http://www.us.pc.ibm.com/support/thinkpad/thinkpad_support.html
A20m
11U/12U
No (uPGA)
PCI
Enhanced IDE
Serial 16550 Compatible
Parallel ECP/EPP

USB Controller

Intel 82371AB(PIIX4)
AT Compatible
Version 1.01
FC/01
BIOS
BIOS
Video BIOS
Video BIOS
Video RAM
64-bit
3.3V
SDRAM PC100
Li-Ion
12.1" TFT 800 x 600
Diagnostic Diskette N/A
Diagnostic Diskette N/A
A20m A20m
21U/22U 31U/32U
http://www.ibm.com/pc/us/support/thinkpad/thinkpad_support.html
No (uPGA) No (uPGA)
PCI PCI
Enhanced IDE Enhanced IDE
16550 Compatible 16550 Compatible
ECP/EPP ECP/EPP
Intel 82371AB(PIIX4) Intel 82371AB(PIIX4)
AT Compatible AT Compatible
Version 1.01 Version 1.01
FC/01 FC/01
BIOS BIOS
BIOS BIOS
Video BIOS Video BIOS
Video BIOS Video BIOS
Video RAM Video RAM
64-bit 64-bit
3.3V 3.3V
SDRAM PC100 SDRAM PC100
Li-Ion Li-Ion
12.1" TFT 800 x 600 15.0" TFT 1024x768
N/A N/A
N/A N/A
3
A20m A20p
41U/42U 61U/62U
No (uPGA) No (uPGA)
PCI PCI
Enhanced IDE Enhanced IDE
16550 Compatible 16550 Compatible
ECP/EPP ECP/EPP
Intel 82371AB(PIIX4) Intel 82371AB(PIIX4)
AT Compatible AT Compatible
Version 1.02 Version 1.00
FC/01 FC/01
BIOS BIOS
BIOS BIOS
Video BIOS Video BIOS
Video BIOS Video BIOS
Video RAM Video RAM
64-bit 64-bit
3.3V 3.3V
SDRAM PC100 SDRAM PC100
Li-Ion Li-Ion
14.1" TFT 1024x768 15.0" 1400 x 1050
N/A N/A
N/A N/A