Product specifications

[...]
/* B A S I C D I S K O P E R A T I N G S Y S T E M (B D O S)
COPYRIGHT (C) GARY A. KILDALL
JUNE, 1975 */
"
3. ^
a b c
Kildall, Gary A. (January 1980). "The History of CP/M, THE EVOLUTION OF AN INDUSTRY:
ONE PERSON'S VIEWPOINT" (http://www.retrotechnology.com/dri/CPM_history_kildall.txt) (Vol. 5,
No. 1, Number 41 ed.). Dr. Dobb's Journal of Computer Calisthenics & Orthodontia. pp. 6–7. Retrieved
2013-06-03. "[...] The first commercial licensing of CP/M took place in 1975 with contracts between
Digital Systems and Omron of America for use in their intelligent terminal, and with Lawrence Livermore
Laboratories where CP/M was used to monitor programs in the Octopus network. Little attention was paid
to CP/M for about a year. In my spare time, I worked to improve overall facilities [...] By this time, CP/M
had been adapted for four different controllers. [...] In 1976, Glenn Ewing approached me with a problem:
Imsai, Incorporated, for whom Glenn consulted, had shipped a large number of disk subsystems with a
promise that an operating system would follow. I was somewhat reluctant to adapt CP/M to yet another
controller, and thus the notion of a separated Basic I/O System (BIOS) evolved. In principle, the hardware
dependent portions of CP/M were concentrated in the BIOS, thus allowing Glenn, or anyone else, to adapt
CP/M to the Imsai equipment. Imsai was subsequently licensed to distribute CP/M version 1.3 which
eventually evolved into an operating system called IMDOS. [...]"
4. ^
a b
Bradley, Tony. "R.I.P. BIOS: A UEFI Primer"
(http://www.pcworld.com/article/248426/r_i_p_bios_a_uefi_primer.html). PCWorld. Retrieved 2014-01-27.
5. ^ Swaine, Michael (1997-04-01). "Gary Kildall and Collegial Entrepreneurship"
(http://www.ddj.com/184410428). Dr. Dobb's Journal. Retrieved 2006-11-20.
6. ^ Killian, A. Joseph "Joe" (2001). "Gary Kildall's CP/M: Some early CP/M history - 1976-1977"
(http://www.imsai.net/history/imsai_history/cp-m_history.htm). Thomas "Todd" Fischer, IMSAI. Retrieved
2013-06-03. "[...] When we failed to produce an operating system in a timely manner, Glenn started talking
with Gary about CPM, which Gary had written for Intel under contract. It took several months of twisting
Gary's arm to get Gary to port it to the 8080. The final success came when Glenn talked Gary into just
separating the I/O from the rest of it, with Glenn promising to re-write the I/O module for the IMSAI 8080
(which he did). So CPM on the IMSAI was a joint effort between Glenn and Gary. [...]"
7. ^ Fraley, Bob; Spicer, Dag (2007-01-26). "Oral History of Joseph Killian, Interviewed by: Bob Fraley,
Edited by: Dag Spicer, Recorded: January 26, 2007, Mountain View, California, CHM Reference number:
X3879.2007," (http://archive.computerhistory.org/resources/access/text/2012/10/102658016-05-01-acc.pdf).
Computer History Museum. Retrieved 2013-06-03. "Killian: "[...] Intel had hired him a few months earlier
to write a control program monitor to run on their little demo system for 8008 and now 8080. [...] Glenn
knew this and he would be talking with Gary, and he started twisting Gary's arm. He said, "Hey Gary, why
can't we run this in this IMSAI?" "The I/O's all different, won't run." But Glenn persists and finally makes
a deal with Gary. He says, "Okay Gary, if you split out the I/O, I'll write the BIOS, basic I/O's system,"
and Glenn named it then. "We'll split it out separately. I'll write that part, as long as you can make a
division in the program there." And he got Gary to do that and Glenn put those two pieces together and was
running Gary's CP/M on an IMSAI. Glenn let us know that, and it wasn't too much later than Bill was
down there making arrangements with Gary Kildall to license CP/M. [...] Now that the BIOS is separated
out, anybody could write a BIOS for their machine, if it was 8080-based, and run this, so he started selling
that separately under the company Digital Research that he formed and did quite well.""
8. ^ page 5-27 IBM Personal Computer Hardware Reference Library Technical Reference, 1984, publication