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IBM ThinkPad Power Series 850
By Thom Holwerda on 2018-10-09 22:57:16

So I learned something new today. Back in the early and mid-90s, IBM tried to build a PC-like platform and ecosystem around its PowerPC processor. They called it the PowerPC Reference Platform, or PReP, and with it, you could build what were effectively PC clones with PowerPC processors, ready to run a number of operating systems, including AIX, Windows NT, OS/2, and Apple's failed Taligent project. None of this is news to me.

What is news to me, however, is that aside from a number of desktop PReP machines, IBM also developed and sold a number of PReP laptops under the ThinkPad brand.

Sometime in 1994, IBM started working on a prototype mobile system named Woodfield and designated as type 6020. Very little is known about this system; it was never officially announced or sold. On June 19, 1995, IBM announced the ThinkPad 850 and 820 (announcement letters 195-178 and 195-179, respectively) with a planned availability date of July 24, 1995. The ThinkPad 820 designation was type 6040, code name Wiltwick; the 850 was type 6042, code name Woodfield Prime.

The ThinkPads 820/850 were to be available with no software or with preloaded Windows NT 3.51 or AIX 4.1.3. OS/2 was to come at some unspecified later date, and Solaris 2.5.1 support was announced in February 1996.

The ThinkPad 850 type 6042 came with 16 or 32 MB RAM, 540 or 810 MB hard disk, and 640×480 or 800×600 TFT display.

Definitely an interesting bit of computing history, and I'd love to get my hands on a working model - they pop up on eBay from time to time.

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