I can remember when I started writing in assembler for my IBMPC that came
with PCDOS 1.0. The calls to the operating system were exactly like CP/M.
All you had to do was load a memory address (I forget which one) with a
value that defined the type of system you call you were making and then
execute a CALL to address 0004 and away you went. PCDOS 2.0 change all of
that.
John [K7SVV]
----- Original Message -----
From: "Brian Lloyd" <[EMAIL PROTECTED]>
To: "Fred (FL)" <[EMAIL PROTECTED]>
Cc: <elecraft@mailman.qth.net>
Sent: Sunday, June 03, 2007 10:44 AM
Subject: Re: [Elecraft] Spilling the HF beans .....
On Jun 3, 2007, at 4:54 AM, Fred (FL) wrote:
And Bill Gates empire was launched, and IBM got
its first DOS contract from Gates - and IBM's PC was
launched.
The way I remember it, IBM decided they wanted a version of CP/M for
their new Intel 8086-based system and went to Digital Research. Somehow
the folks at DR managed to really annoy the folks from IBM. (I heard it
that Gary Kildall's wife wouldn't deal with them because Gary was
out-of-town.) So IBM turned to the small company that was supposed to
provide the BASIC interpreter for the new "PC": Microsoft.
Bill Gates of Microsoft assured IBM that Microsoft had a replacement for
CP/M-86 even though they really didn't. (Ah, vapor-ware has been with us
for a LONG time.) Microsoft then quickly purchased the rights to a CP/M
lookalike called QDOS. That became IBM's PC-DOS which Microsoft then
renamed MS-DOS. The rest is history.
73 de Brian, WB6RQN
Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com
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