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MEMO1062.TXT
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1992-12-02
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╔═════════════════════════════════════════════════════════════════════════╗
║ ║
║ ISA Bus: Symptoms/Solutions: QUIKBUF "Fine Tuning" Parameters ║
║ ║
╚═════════════════════════════════════════════════════════════════════════╝
UNDOCUMENTED PARAMETERS OF QUIKBUF
QUIKBUF version 2.1, included with the latest release of the Intel utility
software (version 4.0A or higher), has two parameters not documented in
the manual that may help you to fine tune QUIKBUF for your hardware. Use
these parameters only if QUIKBUF is not printing at normal speed.
PRINTER BUSY (PB) PARAMETER
This parameter specifies the amount of time QUIKBUF waits for the printer
to finish its various functions. The parameter has the following format:
PB=nnnn
Where "nnnn" is a value that determines the wait time. To use this
parameter, start with the default value listed in the Default Values
section. Then change that value (up and down) in increments of 50 until
you see an improvement in printing speed. Then use increments of 16 to
fine tune.
Some printers (such as the HP LaserJet) need finer adjustments to find an
optimal value. Increments of 50 will probably bypass the highest speed.
In this case, use increments of 16 or less.
MC PARAMETER
The MC parameter specifies maximum characters QUIKBUF will send the
printer per clock tick. The parameter has the following format:
MC=nn
Where "nn" specifies the number of characters. To use this parameter,
start with the default value listed in the Default Values section. Then
change that value (up and down) in increments of two until you see an
improvement in printing speed. Then use increments of one to fine tune.
DEFAULT VALUES
Use these MC and PB default values to determine a practical starting point
from which to begin your adjustments:
┌────────────┬────────────────────┬─────────────────┐
│ IBM PC or │ IBM PC AT/Model 30 │ IBM Model 50/60 │
│ compatible │ or compatible │ or compatible │
┌──────────┼─────┬──────┼────────┬───────────┼────────┬────────┤
│ Port │ MC │ PB │ MC │ PB │ MC │ PB │
╞══════════╪═════╪══════╪════════╪═══════════╪════════╪════════╡
│ Parallel │ 19 │ 2928 │ 24 │ 3776 │ 26 │ 4076 │
├──────────┼─────┼──────┼────────┼───────────┼────────┼────────┤
│ Serial │ 20 │ 2240 │ 35 │ 2432 │ 38 │ 2600 │
└──────────┴─────┴──────┴────────┴───────────┴────────┴────────┘
These were found to be optimum values for various printers. Your
computer/printer combination may require different values.
For serial printers:
┌────────────┬────────────────────┬─────────────────┐
│ IBM PC or │ IBM PC AT/Model 30 │ IBM Model 50/60 │
│ compatible │ or compatible │ or compatible │
┌──────────┼─────┬──────┼────────┬───────────┼────────┬────────┤
│ Printer │ MC │ PB │ MC │ PB │ MC │ PB │
╞══════════╪═════╪══════╪════════╪═══════════╪════════╪════════╡
│ HP │ │ │ │ │ │ │
│ Laserjet │ 20 │ 2240 │ 36 │ 2480 │ 38 │ 2600 │
├──────────┼─────┼──────┼────────┼───────────┼────────┼────────┤
│ Epson │ │ │ │ │ │ │
│ FX-185 │ 20 │ 2240 │ 35 │ 2432 │ 38 │ 2600 │
├──────────┼─────┼──────┼────────┼───────────┼────────┼────────┤
│ OKI │ │ │ │ │ │ │
│ Microline│ │ │ │ │ │ │
│ 192 │ 20 │ 2240 │ 34 │ 2432 │ 38 │ 2600 │
└──────────┴─────┴──────┴────────┴───────────┴────────┴────────┘
For parallel printers:
┌────────────┬────────────────────┬─────────────────┐
│ IBM PC or │ IBM PC AT/Model 30 │ IBM Model 50/60 │
│ compatible │ or compatible │ or compatible │
┌──────────┼─────┬──────┼────────┬───────────┼────────┬────────┤
│ Printer │ MC │ PB │ MC │ PB │ MC │ PB │
╞══════════╪═════╪══════╪════════╪═══════════╪════════╪════════╡
│ HP │ │ │ │ │ │ │
│ Laserjet+│ │ │ │ │ 26 │ 4076 │
├──────────┼─────┼──────┼────────┼───────────┼────────┼────────┤
│ Epson │ │ │ │ │ │ │
│ RX-80 │ │ │ 24 │ 3776 │ │ │
│ FX-100 │ 18 │ 2928 │ 24 │ 3776 │ 26 │ 4076 │
│ FX-185 │ 18 │ 2928 │ 19 │ 2928 │ │ │
│ FX-286 │ │ │ │ │ 24 │ 3776 │
│ LQ-1500 │ 19 │ 2928 │ │ │ 24 │ 3776 │
├──────────┼─────┼──────┼────────┼───────────┼────────┼────────┤
│ OKI │ │ │ │ │ │ │
│ Microline│ │ │ │ │ │ │
│ 92 │ 19 │ 2928 │ 24 │ 3776 │ 26 │ 4076 │
│ 93 │ 20 │ 2912 │ 24 │ 3776 │ │ │
├──────────┼─────┼──────┼────────┼───────────┼────────┼────────┤
│IBM │ │ │ │ │ │ │
│Proprinter│ │ │ │ │ 26 │4076 │
├──────────┼─────┼──────┼────────┼───────────┼────────┼────────┤
│Panasonic │ │ │ │ │ │ │
│ KX-P1091 │ │ │ │ │ 24 │ 3776 │
│ CI 3500 │ 20 │ 2928 │ 24 │ 3776 │ │ │
└──────────┴─────┴──────┴────────┴───────────┴────────┴────────┘
EXAMPLES
Here is an example of what your command line might look like the first
time you load QUIKBUF2:
C:>QUIKBUF2 256 AT E P MC=25 PB=3500
You can do subsequent adjustments of the MC and PB parameters without
rebooting your computer and without specifying other command line
parameters:
C:>QUIKBUF2 MC=23 PB=3450
Disregard the error 510 "can't set up more than one buffer" message; this
is expected.
Don't change QUIKBUF values from a DOS shell; you'll receive unpredictable
results.
══════════════════════════════════════════════════════════════════════════════
End of file Intel FaxBack # 1062 December 2,1992