Article View: comp.sys.atari.st
Article #25485Problems with XBIOS gettime()
From: silvert
Date: Sun, 08 Mar 1987 18:42
Date: Sun, 08 Mar 1987 18:42
25 lines
1837 bytes
1837 bytes
I've run into a problem with reading the keyboard clock, and I don't
know whether it is an error in the Abacus documentation, or a problem
with TDI Modula-2, or a problem with the clock.
The function XBIOS.GetDateTime(), which is supposedly equivalent to
gettime() in C, reads a LONGCARDINAL (long) value. I want to check for
a valid time by seeing if the year is 1987 or later, which I do with the
test: IF XBIOS.GetDateTime() > 0E000000H THEN ..., which should be
equivalent to comparing the value returned by gettime to 0x0E000000 in
C. When I do this in a program that runs from the AUTO folder after a
cold boot (Machine turned off!), the test is always TRUE. I thought
that the keyboard clock under those circumstances was set in 1985, which
would be 0A00.....H. How do other programs, like Braner's AUTODISK,
read this variable, and is there a difference between C and modula-2 in
this?
By the way, I have tried comparing to LONGCARD(0E000000H), which is
equivalent to the cast (long) 0x0E000000. Also, if I use the GEMDOS
function to read the clock, GEMDOS.GetDate(date) and compare date to
0E00H, it works OK.
--
Bill Silvert
Marine Ecology Laboratory, Dartmouth, NS, Canada
CDN or BITNET: silvert@cs.dal.cdn -- UUCP: ..!{seismo|utai}!dalcs!silvert
ARPA: silvert%dalcs.uucp@seismo.CSS.GOV -- CSNET: silvert%cs.dal.cdn@ubc.csnet
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watnot!watmath!dalcs!silvert From: silvert@dalcs.UUCP Newsgroups: comp.sys.atari.st Subject: Problems with XBIOS gettime() Message-ID: <2428@dalcs.UUCP> Date: Sun, 8-Mar-87 13:42:30 EST Article-I.D.: dalcs.2428 Posted: Sun Mar 8 13:42:30 1987 Date-Received: Mon, 9-Mar-87 22:37:28 EST Organization: Marine Ecology Lab. Lines: 25 Keywords: XBIOS, keyboard clock, Modula-2