HP Designjet 100 Driver:

Windows Driver Details

Version: 6.07
Relase Date: 09.14.2008

HP Designjet 100 Printer Series Driver
Operating Systems: Microsoft Windows Vista (64-bit), Microsoft Windows XP 64-Bit
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File name: hpdj100wx64pclen.exe (2.2 MB)

HP Designjet 100 Printer Series PCL 3 Driver
Operating Systems: Microsoft Windows Vista (32-bit),
Microsoft Windows XP (32-bit)
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File Size: 2.1 MB

Mac Driver Details

Hp Designjet 120 Series Mac Installer
Version:     6.6(5 Nov 2004)
Operating Systems: Mac OS 9
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Size: 20.2 MB

Firmware Details

HP Designjet 100,110, 100 Plus and 110 Plus Printer series Firmware Update
Version: S.05.04(5 Sep 2008)
Operating Systems: Microsoft Windows Vista (64-bit), Microsoft Windows Vista (32-bit), Microsoft Windows XP (32-bit), Microsoft Windows XP x64
Mac OS 9, Japanese Mac OS 9, Japanese Mac OS X, Mac OS X 10.5
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Size: 1.9 MB