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"The computer book of the month is The Bios Companion by Phil Croucher. Long-time readers of this column will recall I have recommended his book before. This tells you everything you ought to know about the BIOS in your system. Post codes, options, upgrades, you name it.

Years ago, I called an earlier edition of this invaluable and I see no reason to change my view. Recommended.
"

Jerry Pournelle
Byte Magazine

"Croucher's book was invaluable 20 years ago and remains so today...... Every one of the 468 pages holds useful information, the author having zero tolerance for padding."

Davey Winder
PC Plus Magazine

"You've completerly impressed me with the quality and scope of your guides - extreme care has obviously gone into their research and preparation."

Jeremy Fleming

"His style is lovely: clear, jargon-free where possible, chatty and friendly with beautiful short paragraphs. It [Communications & Networks] joins my list of 'I wish I'd written it' books. I haven't come across such a good subject book in a long time at this price."

Lorna Kyle
Personal Computer World

"To any micro owner who wants to know what this comms business is all about, [Communications & Networks] is certainly one of the best around. ... Croucher is not only knowledgable about his subject, he's interested in it and communicates that interest to you. "

Ron Peck
New Computer Express

"There are few books about which explain as accurately and comprehensively as [Communications & Networks] does what communications are all about. The glossary is excellent."

Micro Decision

"...any PC user with a genuine interest in using his machine to its full potential will recognise [Communications & Networks] for the completely invaluable tool and often the inspiration that it is."

Yvonne Taylor
Which PC

"[Communications & Networks] is the type of book you can read on a bus or train without getting a headache from trying to understand what it means."

Network

"As a recently reformed computer illiterate myself, I appreciated the author's straighforward yet humourous and light-hearted style of writing. He manages to strike the balance between too much and too little information. ... [Computing Under Protest] is never in danger of either boring or confusing the reader."

Emma Tyrrall
Practical PC

"Good documentation is important for any software, but even more so for an operating system - the documentation [for DOS 386 Professional] has some exceptionally clear explanations. Altogether, the documentation is an example of the right way of doing things, and other software manufacturers would do well to take note."

Matthew Holbrook
Computer Shopper

"The DOS 386 Professional manual sets arrived at 2130 local time today. We have had a brief look at them and wish to congratulate IMS on the excellent, clear and concise manner in which they have been presented."

Fred Parker
ETL Soft

"I remain impressed by Mr. Croucher's fluid writing style, practical orientation, enthusiasm, and strong technical knowledge."

Lance A Leventhal
Slawson Communications, Inc



JAR Professional Pilot Studies

"Its real value lies in taking the plethora of booklets and ring-bound photocopies associated with commercial examinations and condensing them into an attractive and portable form. The guy really does deserve a medal ~ he has made a genuine contribution to the body of professional aviation literature assembled during the course of the last century.

I heartily recommend it to students of commercial flight, if only as a souvenir of their efforts... "

Colin Hilton
Pro Pilot's Rumour Network

"(The) Book is quite a good compliment to our notes for students. We will be recommending all our students buy the books.... "

Chris
Naples Air Centre

"I got your book last month and am in the process of ploughing through it! Actually, I really like it and find it very interesting and easy to read."

Simon Rouse

"So far I have found your book an extremely helpful reference manual to carry around in my flight bag."

Blair Clubley

"I wish to commend you on a "work of art". I wish the CAA would produce a quick reference easy to read manual such as yours. Truly wonderful!"

Ebrahim Parkar

 
Post Codes
 Acer
 ALR

 AMI
 Arche
 AST
 AT&T
 Award
 Chips & Technologies
 Compaq
 Dell
 DTK
 Eurosoft/Mylex
 Faraday A-Tease
 HP
 IBM
 Intel
 Landmark
 Microid/MR
 NCR
 Olivetti
 Philips
 Phoenix
 Quadtel
 Supersoft
 Tandon
 Zenith

DTK POST Codes

Evolved from ERSO (Taiwan).

Note: Not all POST codes are included below - the latest information is in the The BIOS Companion, which contains over 100 pages of them.

01 Testing the CPU
03 Initialize the 8259 interrupt controller
05 Initialize the video board - MCA & CGA
0D Initialize the 8237 DMA controller
0E Initialize the DMA 74612 page registers
12 Test the 8042 keyboard controller
16 Test the DMA 7237 controller and 8254 programmable interrupt timer
22 Testing DRAM refresh circuitry
25 Base 64KB memory test
30 Set up system stack
33 Read-system configuration through 8042 keyboard controller
37 Test keyboard clock and data line
40 Determine video type
44 Locate and test, if present, MDA and CGA video
48 Initialize video 80 x 25 mode
4D Display DTK BIOS copyright message
4F Check serial and parallel ports
50 Check floppy disk controller
55 Check shadow RAM
58 Display total memoryand switch to real mode
5A Successful switch back to real mode
60 Check hard disk drive controller
62 Initialize floppy drive
65 Initialize hard drive
67 Initialize the floppy disk drive and the hard disk drive
6A Disable gate A20 and test math coprocessor
70 Set system date and time RTC-146918
77 Call interrupt 19 boot loader

 




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