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From: gollub@nprdc.navy.mil (Lewis Gollub)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Programming the 8253 Chip
Message-ID: <8863@arctic.nprdc.arpa>
Date: 1 Aug 90 21:26:33 GMT
References: <8019@jarthur.Claremont.EDU>
Sender: news@nprdc.arpa
Reply-To: gollub@nprdc.navy.mil (Lewis Gollub)
Organization: Navy Personnel R&D Center, San Diego
Lines: 8

I am working with a program that reprograms the 8253 time register
chip in order to extract 1 millisecond timing accuracy from an XT.

Under normal termination, the chip gets reprogrammed to Mode 0, and
all original values are restored.

My question is: What happens if the 8253 is NOT reprogrammed? In what
way(s) does the computer run wrong? Can it create disk errors?