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$Id: readme.dos,v 1.8 1999/03/22 06:16:24 lightner Exp $
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Copyright (c) 1997,1998 Eugene G. Crosser
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Copyright (c) 1998,1999 Bruce D. Lightner (DOS/Windows support)
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You may distribute and/or use for any purpose modified or unmodified
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copies of this software if you preserve the copyright notice above.
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THIS SOFTWARE IS PROVIDED AS IS AND COME WITH NO WARRANTY OF ANY
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KIND, EITHER EXPRESSED OR IMPLIED. IN NO EVENT WILL THE
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COPYRIGHT HOLDER BE LIABLE FOR ANY DAMAGES RESULTING FROM THE
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Revision 1.8 1999/03/22 06:16:24 lightner
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Revision 1.6 1999/01/17 13:33:48 crosser
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Revision 1.5 1998/10/18 13:18:27 crosser
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Put RCS logs and I.D. into the source
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Revision 1.4 1998/08/09 17:02:22 crosser
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notes about the port speed and TZ variable
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Revision 1.3 1998/08/01 13:12:41 lightner
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*** empty log message ***
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Revision 1.2 1998/02/28 09:20:41 lightner
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no more file size limit
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Revision 1.1 1998/02/06 00:17:16 lightner
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This is a 16-bit MS-DOS version of Eugene G. Crosser's "photopc" digital
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camera software. This software is known to work with Agfa, Epson and
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Olympus cameras with 80x86-based PC's, laptops, and "palmtops" (e.g.,
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HP200LX) running MS-DOS.
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The software has been found to run at the camera's fastest serial port
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speed (i.e., 115200 baud) on newer PCs. However, a reduced serial port
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speed (using the -s command line option) may be needed for proper
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operation on older PCs and laptops (and with most "palmtops", due to
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their slow processors). Note that the program's default serial port
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Note that due to the camera design, negotiation always starts at 19200
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baud, so if your serial port only runs up to 9600, it won't work even
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despite 9600 is a valid communication speed for the program.
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The MS-DOS version also will run in a command window (i.e., "MS-DOS
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Prompt") under Windows 95 and Windows NT (but often times only at
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reduced serial port rates).
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This MS-DOS version was compiled under Borland International's 16-bit
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80x86 compiler, Turbo C++ Version 3.00, using the "small" memory model.
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Refer to the makefile "makefile.dos" for compile instructions.
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Pay close attention on the `TZ' environment variable definition. If
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this variable is not set, or set improperly, MS/DOS makes very strange
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assumtion about your timezone, and result of setting and displaying
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of the camera internal clock may be unpredictable.
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The MS-DOS code has been modified to support >64K byte images (using
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#define LOW_MEMORY). This was achieved by changing the program's logic
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to write image data to the disk file in 2048-byte chunks, as the data is
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being read from the camera. The other versions of the software (i.e.,
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Unix/Windows) write the image to disk only after the entire image has
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been read from the camera (into a large in-memory buffer).
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The serial I/O package used by the MS-DOS version of "photopc.exe"
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supports serial ports COM1, COM2, COM3, and COM4, assuming the standard
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IRQ assignments (i.e., COM1 and COM3 use IRQ4 and COM2 and COM4 use
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The "photopc.exe" program installs an interrupt handler for the serial
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port at IRQ3 or IRQ4. This handler is removed on program exit, or if
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the user terminates the program with ^C or control-break. Other
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abnormal exits (e.g., hard disk I/O errors) may leave the the handler
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installed...which is sure to cause problems!
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This software makes use of a serial I/O package (comio.c) taken from a
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public-domain SIMTEL archive named "cvt100.zip" (VT100, A Simple VT100
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Emulator in Turbo C 1.5 by Jerry Joplin), which was somehow derived from
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Kermit. These routines do not take advantage of the serial port queues
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available in modern PC chipsets (i.e., 16550 UARTS).
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Refer to the file "README" for more information.
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Please consult the following URL for the latest softweare information:
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http://www.average.com/digicam/
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Trademarks are properties of their respective respected owners.
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Bruce D. Lightner (lightner@lightner.net) Sat Jul 25 17:37:40 pdt 1998
added
removed
readme.dos
