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From: prindle@nadc
Newsgroups: net.micro.cbm
Subject: C128 CP/M program "C1571"
Message-ID: <2592@caip.RUTGERS.EDU>
Date: Mon, 30-Jun-86 09:18:46 EDT
Article-I.D.: caip.2592
Posted: Mon Jun 30 09:18:46 1986
Date-Received: Tue, 1-Jul-86 02:44:02 EDT
Sender: daemon@caip.RUTGERS.EDU
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 19

From: prindle@NADC

One very popular, and very handy, CP/M utility for the 128 is Von Ertwine's
"C1571", which promises and delivers accelerated writes to 1571 disk files by
eliminating a redundant verify done by the CP/M BIOS after each disk sector
write (redundant in the sense that the 1571 already is doing an internal
verify anyway).  Consequently, I was tempted to execute this in my PROFILE.SUB
at boot up.

However, I just noticed an undesirable, and somewhat unexplainable, side effect
of this program: once it has been run against a drive, that drive will no longer
read MFM formatted diskettes (well, I tried IBM, OSBORNE, and KAYPRO IV, and 
they all failed).  The system just hangs after a sector or two have been read,
and the keyboard scan stops (no more keyclicks); a reboot is necessary.  I hope
this can be fixed and the program will be re-issued along with the "new-new-new"
CP/M 3.0 release which has been announced.

Frank Prindle
Prindle@NADC.arpa