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1993-12-15
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GVP-IO Patch 1.0
================
⌐ 1993 by Marc Heuler (Data Design)
marc@aargh.incubus.sub.org
LEGAL
~~~~~
This is freeware. Distribute it whatever way you like, but care about
these rules:
╖ Don't change anything, especially the Copyright notices must stay
intact.
╖ Spread the program in whole (documentation included).
Especially GVP and DTM Germany are allowed to include it with their GVP IO
Extender.
There's no warranty, use at your own risk. If you feel necessity to donate
something to the author, just do it.
REQUIREMENTS
~~~~~~~~~~~~
Using GVP-IO Patch requires Kickstart 2.04 or higher, and the GVP IO
Extender board with software version 1.7 installed. It might work with
other versions, although I didn't test.
WHAT IS IT?
~~~~~~~~~~~
This program is useful in conjunction with the GVP IO Extender board only.
The current software (version 1.7) is lacking a nice feature, and contains
a minor bug. GVP-IO Patch is intended to solve these problems. The new
(added by this program) functionality of your GVP IO Extender board is:
╖ CPU load during high speed transfers is decreased considerable.
╖ Software relying on EOFMODE (such as common Voice Mail software
for ZyXEL modems) that does not work with GVP IO Extender might
work now.
INSTALLATION
~~~~~~~~~~~~
Drag the icon into your SYS:PREFS drawer. The GVP IO Extender software
must be installed correctly (Binddrivers command in startup-sequence),
however, it probably already is.
USAGE
~~~~~
You can start GVP-IO Patch from Shell or Workbench. It will open a window
with those choices:
IRQ.... This describes after how many bytes received the board
should issue an Interrupt Request to the computer. The
FIFO buffer can hold up to 16 bytes - if it is filled up,
further data will be lost. On the other hand, if
interrupts occur often (one interrupt per one or very few
bytes), the CPU is quite busy answering all those requests.
GVP IO Extender software is delivered with this value set
to 1. An ideal value is around 8, because it reduces CPU
load during high speed transfers significant, but still
offers an 8 byte safety margin to not lose any data.
You can choose between 1 and 8.
EOF.... The EOFMODE is used by some not very common software
packages such as many Voice Mail programs for ZyXEL modems.
The GVP IO Extender software rejects SDCMP_SETPARAMS
requests with EOFMODE set to ON. This causes some programs
to fail.
If you set this option to YES, the software described might
work better with your GVP IO Extender board. Set it to NO
for default behaviour, although I don't recommend this.
SAVE... Save your changes permanently.
USE.... Save your changes temporarily (until you reboot the Amiga).
CANCEL. Exit the program without patching.
In the menu strip, it'll present those functions:
ABOUT.................. Show information about GVP-IO Patch.
QUIT................... Exit the program without patching.
RESET TO DEFAULTS...... Load default values, just like a brand-new
GVP IO Extender board comes with.
LAST SAVED............. Re-load the last configuration you saved.
RESTORE................ Restores the settings as they were before
you began to play around with the gadgets.
If the program can't identify the GVP IO Extender software on disk or in
memory, it will complain. If it does not, you can be pretty sure it
patches correctly, even if you use another software version than 1.7 (but
be careful though).
THANKS
~~~~~~
Thanks to Ralph Babel (maker of GVP IO Extender software) who explained me
where to actually patch the software.
AUTHOR
~~~~~~
To contact me for donating or some other reason, here's my address:
Mail: Marc Heuler
Stephanstr. 6
97070 Wuerzburg
GERMANY
Phone: +49 931-53295 (voice)
EMail: marc@aargh.incubus.sub.org