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- From: dlyons@Apple.COM (David A Lyons)
- Newsgroups: comp.sys.apple2
- Subject: Re: ProDOS 8 busy?
- Message-ID: <76483@apple.apple.COM>
- Date: 12 Jan 93 01:07:42 GMT
- References: <9212311159.AA23769@apple.com>
- Organization: Apple Computer Inc, Cupertino, CA
- Lines: 21
-
- In article <9212311159.AA23769@apple.com> ST2975@SIUCVMB.SIU.EDU writes:
- >Is there an undocumented error code for ProDOS 8 busy
- >similar to GS/OS busy?
- >
- >I was thinking of returning from a subroutine with a
- >zero in the accumulator indicating that no error occurred
- >but with the carry set to simulate a ProDOS 8 busy error.
-
- There is no ProDOS 8 busy error code, although there is a P8 busy flag
- on $BF00 page (you only need to check it if you're trying to make P8
- calls from an interrupt, which is rare and tricky & only works for local
- disks, not AppleShare network disks).
-
- Internal to your program, if you want to use SEC/A=0 to flag some error
- condition, that's no problem. P8 won't return that.
- --
- David A. Lyons, Apple Computer, Inc. | DAL Systems
- Apple II System Software Engineer | P.O. Box 875
- Internet:dlyons@apple.com | Cupertino, CA 95015-0875
-
- My opinions are my own, not Apple's.
-