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HISTORY.TXT
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1993-10-17
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202 lines
Revision History
The following changes/additions were made in internal build
0.113.
The initialization procedure for enabling the FIFOs of the
16550 was changed as per directions from StarTech. The
StarTech 16550 is used in many Practical Peripherals modems.
This change may correct overrun and hanging problems for
other users. User reports indicate that the FIFOs
initialization problem may go beyond the StarTech 16550 and
thus, solve problems for users of other 16550s.
The following changes/additions were made in internal build
0.114.
Additions to force enabling of comm ports for VMBs under
2.1GA.
Version number was changed to α1.01
The following changes/additions were made in internal build
0.115.
The Interrupt Service Routine (ISR) was improved to insure
that all pending interrupts of all ports sharing the same
IRQ are serviced.
The following changes/additions were made in internal build
0.116.
Additional changes to decrease the processing time of the
Interrupt Service Routine.
The following changes/additions were made in internal build
0.117.
Additional information added to the boot time banner.
Changed the version number to 1.02.
The following changes/additions were made in internal build
0.118.
Corrected erroneous sending of XON when receive flow control
was enabled.
Added code to clear the UART's FIFOs during initial file
open.
The following changes/additions were made in internal build
0.119.
Corrected a problem with hardware flow control for DOS
processes. This problem showed up most often in windowed
DOS programs.
Removed code specific to the March, 1993 beta of OS2.
Added support for installable and removable communications
devices, eg PCMCIA.
Some users of VX00 will see improved performance from FOSSIL
aware DOS programs.
The following changes/additions were made in internal build
0.120.
Code added to allow I/O port mapping to DOS sessions.
The following changes/additions were made in internal build
0.121. 7/28/93 14:00pm
Corrected a problem that would cause the system to hang if
an SIO command line error was detected.
Additional code added for "hot plugging" of PCMCIA comm
ports. Users of PCMCIA comm devices should not remove those
devices while a comm program active. Many comm application
programs can not cope with the modem being removed. Your
system may lock up if you remove a modem while a comm
application program is active.
Changed the way virtual CTS is handled. In previous
versions, the virtual CTS was always on. Under appropriate
conditions, the virtual CTS will now be turned off.
The following changes/additions were made in internal build
0.122. 8/14/93 14:20
Corrected a problem in the internal (to SIO) shared
interrupt chain. This problem would cause the system to
lock up when the third device checked in on the same IRQ.
Added command line options for PCMCIA.
The following changes/additions were made in internal build
0.123. 8/18/93 19:05
Added code to wake sleeping receive threads when a Flush
Input command is received. This additional code allows HA/5
Version 3.1 to work with SIO.
Changed the version number to 1.10 and released it for
downloading.
The following changes/additions were made in internal build
0.124. 8/28/93 14:50
Corrected a serious error in SIO. This problem could show
up in almost any way. The most common symptom is/was trap
000e and inordinate processor overhead when comm is active.
0.125. 9/09/93 08:15
Changed version number to 1.11
Corrected problem associated with generating a virtual
transmit interrupt. This problem was introduced with the
released version 1.10. It broke PCBoard, among others.
Added DTR/DSR handshaking. It seems that several printers
requires this type of handshaking. This addition
necessitated the addition of the DOS Setting
SIO_Virtual_DTR_is_HS. This new DOS setting is the first
SIO setting that should normally be off. When a DOS or
Windows session is using DTR/DSR handshaking, this setting
should be turned on. The HP laser printers are the only
devices that I know of (or ever heard of) that use DTR/DSR
hardware handshaking. All modems that I know of use RTS/CTS
hardware handshaking.
0.126 09/22/93
Corrected problems that were introduced when the PCMCIA code
was added and released in V1.10. These problems caused
several DOS and Windows programs to work poorly or not at
all. These problems also caused some DOS and Windows comm
programs to use inordinate amounts of processor time.
Changed the version ß1.13.
Corrected a problem in the FOSSIL implementation of VX00.
Some FOSSIL aware programs that previously did not work
under VX00 may now work.
0.127 09/30/93 17:20
Changed version number to 1.15 and released.
Added DOS settings to allow for individual mode settings for
each DOS session. The DOS Settings SIO_Virtual_RTS_is_HS
and SIO_Virtual_DTR_is_HS have been removed. Their function
is more completely covered in the new DOS Settings.
Optimized code to eliminate unnecessary virtual transmit
interrupts. This change should cut down the amount of
overhead placed upon the system by DOS and Windows comm
programs.
Changed the way the DCB is processed so that CTS may be
ignored (if instructed by the DCB) even when RTS is a
handshake signal.
Previously, SIO would force RTS/CTS handshaking if the baud
rate is locked in the command line. The forcing of RTS/CTS
handshaking has been removed.
A flow control problem that showed up on some systems has
been corrected. The flow control problem most often showed
up at transmission simply stopping. This problem was
introduced when the DTR/DSR handshaking was added.
Added the "SIO_Share_Access_With_OS/2" DOS setting.
Changed version number to 1.20.
0.128 10/17/93 12:30
Nothing yet.