[TUHS] Story about Microsoft and *ix

David Arnold davida at pobox.com
Thu Apr 8 18:16:21 AEST 2021

> On 8 Apr 2021, at 16:02, Steve Nickolas <usotsuki at buric.co> wrote:
> On Thu, 8 Apr 2021, Ed Bradford wrote:
>> Does anyone recall how much RAM memory could be put on the first IBM PC's? That was probably a major problem.
> As I recall the earliest models supported 16-64K onboard, with later models supporting 64-256K.  The 1981 firmware was, IIRC, limited to 544K (changed to 640K in 1982).

Wikipedia agrees.  $1565 minimum configuration had 16KB RAM, CGA graphics, and single 5.25” floppy drive (that is, no hard drive).

DOS 2.0, 2 years later, shipped with the XT which had 128KB RAM and a 10MB hard drive.  That might have been more practical.


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