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1994-07-23
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308 lines
COMW v2.20
Communications Wait
by John Ericson
INTRODUCTION
I originally intended COMW to connect to my friend's system due to the
number of errors we were having using SERSETUP. I completed this task
after a few evenings. Then I thought that this would be a good opportunity
to transfer COMW updates and/or WAD files and added a streaming mode file
transfer. By this time I had found the source for SERSETUP on a BBS. I
felt I could modify the protocol to make the communications faster and more
reliable. After a few more days of programming and many days of testing
and playing, I arrived at what you see now.
OPERATIONS
Start COMW from the command line using the syntax of
COMW SECTION1 SECTION2 SECTION3 ...
You may specify one or more section names for COMW to execute from the
COMW.INI file. If you do not specify any section names, COMW will use the
DEFAULT section name. Please note: the section COMMON is always executed.
COMW.INI FORMAT
The COMW.INI file uses the following format:
[section name] comment
keyword=data
keyword=data
keyword=data
keyword=data
keyword=data
keyword=data
[section name] comment
keyword=data
keyword=data
keyword=data
keyword=data
Section names and keywords are not case sensitive. You may not have any
spaces before the `=`. You may use section names more than once. Blank
lines and lines with invalid keywords are ignored. COMW will not report
invalid keywords or invalid keyword data. COMW will process all selected
sections twice. The first pass is to configure all the parameters before
COMW opens the communications port. The second pass is for all activities
using the open port.
KEYWORDS
First pass
com=n
Default: 1
Valid values: 1, 2, 3, or 4
This keyword specifies the communications port. COMW only uses COM1, COM2,
COM3, and COM4 at the standard address and hardware interrupts.
port=n
Default: none
Valid values: not validated
This keyword specifies the nonstandard communications port address in hex
(i.e. COM1 is 3f8, COM2 is 2f8). When this keyword is specified you must
specify a IRQ setting. An invalid address can crash your system.
irq=n
Default: none
Valid values: not validated
This keyword specifies the nonstandard communications port hardward
interrupt (I.E. COM1 is 4, COM2 is 3). When this keyword is specified you
must specify a PORT setting. An invalid interrupt can crash your system.
IRQ settings of 3 through 15 are supported.
baud=n
Default: 2400
Valid values: speeds supported by the 8250 or 16550 UARTs
This keyword specifies the communications speed for the communications
port. I have tested the assembler communications driver routine a speeds
from 300 to 115200 with RTS/CTS and XON/XOFF flow control.
buffer=n
default: 2048
Valid values: 1024-8192
This keyword specifies the number of bytes for the input and output buffers
each.
flow=string
Default: rdy
Valid values: none, xon, rdy
This keyword specifies the bi-directional flow control COMW uses with the
communications port. `none' means no flow control. `xon' means XON/XOFF
flow control. `rdy' means RTS/CTS or Ready/Busy flow control.
color=n
Default: 112 (black on white)
Valid values: 0-255
This keyword specifies the normal screen colors COMW uses in the popup
display. The color values use the standard CGA color scheme (i.e. 1=blue,
2=green, 3=cyan, 4=red, 5=magenta, 6=yellow, 7=white, 8=high intensity).
Multiply the color by 16 to get the background colors. Example: 1(blue) *
16 + 8(high intensity) + 7(white) = 31. Note: COMW enables high intensity
background colors (blinking is disabled).
bcolor=n
Default: 240 (black on high intensity white)
Valid values: 0-255
This keyword specifies the boarder color used by COMW for the popup
display.
scolor=n
Default: 128 (black on high intensity black[dark gray])
Valid values: 0-255
This keyword specifies the shadow color used by COMW for the popup display.
dsr=string
Default: off
Valid values: on, off
This keyword specifies whether COMW will wait for the modem for remote
computer to assert the DSR signal before processing keywords on the second
pass.
meblock=n
Default: 1012
Valid values: 128-8192
This keyword specifies the MEMODEM file transfer block size. Each block
has a 12 byte header including a crc32 checksum.
mestream=string
Default: off
Valid values: on, off
This keyword specifies the MEMODEM files transfer mode. MEMODEM supports
paced and streaming modes.
merestart=string
Default: off
Valid values: on, off
This keyword specifies the MEMODEM receive restart mode. MEMODEM supports
restarting at the beginning (off) or after the last valid block (on).
meblkdelay=n
Default: 0
Valid values: not validated
This keyword specifies the MEMODEM delay (in 100th of a second) place
between blocks.
medown=string
Default: current
Valid values: any existing DOS directory path (not checked)This keyword
specifies the default DOS directory for incoming MEMODEM file transfers.
meup=string
Default: current
Valid values: any existing DOS directory path (not checked)This keyword
specifies the default DOS directory for outgoing MEMODEM file transfers.
Second Pass
flush
This keyword instructs COMW to wait for the output buffer to empty.
fifo=n
Default: 16
Valid values: 0, 1, 4, 8, 16
This keyword instructs COMW to set the fifo mode of a 16550 UART.
leave
This keyword instructs COMW to leave DTR and RTS on when the program exits.
Normally these are turned off when COMW closes the communications port.
delay=n
Default: 0
Valid Values: not validated
This keyword instructs COMW to leave delay (in milliseconds) between
characters transmitted. This options allow you to slow down the
transmissions for modems in command mode. This delay should be set to 0
after the modems connect.
out=string
This keyword instructs COMW to transmit the characters of the string. The
contents of the string wil be explained later. Note: characters
transmitted will not be echoed to the popup display.
echo=string
This keyword instructs COMW to send the characters of the string to the
popup display.
wait=string
This keyword instructs COMW to wait for a string from the communications
port (i.e. `ok' or `connect'). COMW compares only the number of characters
in the string. This allows for generic modem responses (i.e. `connect'
matches `connect 9600' or `connect 9600/ARQ').
exit
This keyword instructs COMW to exit back to DOS with an errorlevel of 0.
COMW closes the communications port and restores the screen under the popup
display.
mesendf=string
This keyword instructs COMW to start a MEMODEM file transfer send using the
string as a DOS path for a file. Note: MEMODEM transfer requests only
contain the DOS file name, not the complete path. COMW on the remote
system uses the `medown' keyword to determine where to place the file.
megetf=string
This keyword instructs COMW to start a MEMODEM file transfer get using the
string as a DOS path for a file. Note: MEMODEM transfer requests only
contain the DOS file name, not the complete path. COMW on the remote
system uses the `meup' keyword to determine where to place look for the
file.
doom=string
This keyword instructs COMW to start ID's DOOM v1.2 using the string as
command line parameters for the game. COMW will allow you any speed and
modem settings you like. This will allow you to experiment. The buffers
size used by the communications routine is set to 528 bytes and can not be
changed. I have obtained the best performance using the maximum speed the
modems will connect using no compression or block protocol (i.e. MNP or
V.32bis). PLEASE NOTE: the communications protocol used by COMW for DOOM
is not compatible with SERSETUP. Therefore both sides must use COMW. The
lowlevel communications routine are written in "heads down" assembler. Do
NOT use XON/XOFF flow control, this will interfere with the protocol.
DOOM, the DOOM logo and DOOM likenesses are trademarks of
id Software, inc.,(C)1993.
player=n
Default: 0
Valid values: 0, 1
This keyword instructs COMW to start the DOOM player negotiations with the
specified player number. Player zero becomes the console for the network
game and should be the player with the faster computer/communications
port(i.e. 16550 UART).
ticdup=n
Default: 1
Valid values: 1-5
This keyword instructs COMW to set the corresponding value in the DOOM
communications block. I included this setting for testing purposes and did
not remove it when I was done. I recommend leaving it at the default
setting.
extratics=n
Default: 0
Valid values: 0, 1
This keyword instructs COMW to set the corresponding value in the DOOM
communications block. I included this setting for testing purposes and did
not remove it when I was done. I recommend leaving it at the default
setting.
KEYBOARD
Standard ASCII characters entered at the keyboard are sent to the
communications port. The ESCAPE key however, will cause COMW to exit back
to DOS with an errorlevel of 1. COMW closes the communications port and
restores the screen under the popup display. In chat mode, the characters
entered at the keyboard will be echoed in the popup display and COMW will
add the LINE FEED character after each ENTER character. The Alt-c key
combination will toggle in and out of chat mode.
OUT & ECHO STRINGS
COMW will perform special functions for the following characters:
#
This character will cause COMW to drop the DTR and RTS signals to the modem
for one second (out keyword only).
^
This character will cause COMW to interpret the next character as a control
character (i.e. ^m or ^M represents the enter character; ^j or ^J
represents the line feed character).
~
This character will cause COMW to delay for 2 tenths of a second.
`
This character will cause COMW to transmit it's program ID string.