Get Accurate Timing on FreeBSD/DOS

[H.Shiozaki]

Followup-To: alt.msdos.programmer
1st of all, I'm sorry my poor English (I'm a Japanese)
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I made a demonstration program named Gat (Get Accurate Timing) on the PC,
for small robot, FA_Control/Measurement applications.
You may download Gat-executable file, then you can evaluate gat immediately.
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Gat corresponds to DOS, FreeBSD, Linux, Win98, and Win2k currently.
The timing performance of Gat is ideal in pureDOS and FreeBSD, good in
Linux.
The timing characteristic is miserable in Win98 and Win2k.
Reverse viewing, Gat shows the about amount of overhead time of OS.
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Download file v.s. OSs (all are English version)
http://www.geocities.jp/sios_hp/gat_page/software/free-gat75-demo-en/
pureDOS: gat75-dos-demo.zip
FreeBSD: gat75-freebas-demo.zip
Linux: gat75-linux-demo.zip
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eatch zip file includes:
gat75-[OS_TYPE_Name] (gat75-exe-file)
Readme.txt (freeware, copyright and NO WARRANTY)
os_vs-exe-file.txt (os name v.s. exe-file name list)
gat75-sw/sh.txt (command exsapmles)
_mypcid1.env (need for run gat75-demo-version)
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If gat75 sp=3 is specified, gat　outputs rectangular wave to parallel port,
The maximum frequency is about 50kHz.
You may evaluate gat75 timing by measuring jitter(with an oscilloscope.)
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At least, Gat75's timing accuracy is a useful information for all PC user.
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I hope to get your opinions. (Please write easy easy English.)
If you have interest to Gat, please refer my web_pgae below.
note: I put "Gat for English Reader" at left hand of the home page.
Thanｋ you.
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FM: H.Shiozaki
E-Mail: sio...@yahoo.co.jp
URL: http://www.geocities.jp/sios_hp/