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1995-01-01
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Date: Mon, 13 Jun 1994 13:08:57 MDT
From: Rob Slade <roberts@decus.ca>
Subject: Book Review: "Mastering Serial Communications" by Gofton
BKMSSRCM.RVW 940323
Sybex, Inc.
2021 Challenger Drive
Alameda, CA 94501
510-523-8233 800-227-2346
Fax: 510-523-2373
or
Firefly Books
250 Sparks Avenue
Willowdale, Ontario M2H 2S4
416-499-8412 Fax: 416-499-8313
"Mastering Serial Communications", Gofton, 1994, 0-7821-1202-1, U$26.99/C$36.95
The title overstates the case a bit here. To begin with, the serial
communications are to take place only on an RS-232 port. The promise
of the inclusion of LAN technology refers only to a brief discussion
of the Novell NetWare Asynchronous Services Interface (NASI); a means
of accessing a COM port over a LAN. The COM port had better be on an
MS-DOS machine: other than mentioning that the Macintosh serial ports
are not "true" RS-232, they don't rate any ink. Finally, the
communications had better be with a modem or host computer. This
might be the primary use of MS-DOS COM ports, but there isn't even the
slightest mention of the possibility of using serial communication for
process control or data collection.
Within those limits, Gofton has written an interesting book. The
coverage is quite distinct from other personal computer communications
guides. Gofton states that he is interested in a technical resource,
and does give significantly more detail in some areas than other
works. On the other hand, he is surprisingly coy about some topics.
The difference between band and bits per second is mentioned, but
never defined. The Hayes "AT" command set explanation is possibly the
best I have seen to date, but there is no help with diagnosing the
most common parameter setting mistakes. The modem reference explains
V.32, but not V.42, MNP levels or 14,400 bps modems.
Part of this may be due to the fact that the book appears to have been
hurriedly updated from the 1986 edition. All references are to the
RS-232-C version, rather than the more recent D version (more properly
referred to as EIA-232-D). The importance of IRQ settings is
explained, and COM3 and 4 are mentioned, but there is no explanation
of the means of using COM3 and 4 given that most configurations only
allow you to use two IRQs.
Gofton's writing style is clear and, when he gives sufficient
information, is quite suitable for the end user. The communications
novice, given a necessary level of interest and perseverance, should
be able to obtain a lot of useful material from the first half of the
book. The utility to the programmer, or more technically advanced
user, is problematic. However, even the experienced programmer, if
approaching serial communications for the first time, could get a lot
of value from this book.
copyright Robert M. Slade, 1994 BKMSSRCM.RVW 940323. Distribution
permitted in TELECOM Digest and associated newsgroups/mailing lists.
DECUS Canada Communications, Desktop, Education and Security group newsletters
Editor and/or reviewer ROBERTS@decus.ca, RSlade@sfu.ca, Rob Slade at 1:153/733
BCVAXLUG ConVAXtion, Vancouver, BC, Oct. 13 & 14, 1994 contact vernc@decus.ca