Path: utzoo!attcan!uunet!husc6!think!ames!pasteur!ucbvax!hplabs!hpda!hpcuhb!hpcilzb!tedj From: tedj@hpcilzb.HP.COM (Ted Johnson) Newsgroups: comp.sys.mac Subject: Re: help with a clinically depressed mac Message-ID: <870213@hpcilzb.HP.COM> Date: 15 Aug 88 17:05:04 GMT References: <2077@ncsuvx.ncsu.edu> Organization: HP Design Tech Center - Santa Clara, CA Lines: 62 >when a mac suddenly crashes in the middle of an application and a sad mac >comes up with 02902 code beneath it (no bomb/restart/resume dialog at all) >what could it be? Me thinks you are missing a digit there, bucko. From my friend's pirate copy of "Mastering Macintosh - For Apple Eyes Only": (I'm only typing in this stuff once, so save this for future reference!!!) --------------cut here---------------------------------------- Sad Mac codes When you turn on the Macintosh or press the Reset programmer's switch, several memory and system diagnostic tests take place. If any test fails, the Sad Mac appears. The code number below it indicates the nature of the malfunction. The first two digits indicate the type of error. If it is a RAM test failure (02, 03, 04, or 05), the last 4 digits identify the suspect RAM chips. You must convert the last 4 digits, which are hexadecimal, to a 16-digit number to learn which chips are bad. If a Sad Mac appears after the disk starts spinning, the first 2 digits of the code number under the icon are 0F, and the next 4 digits indicate the type of error. If you get a Sad Mac with an 0F code, try restarting the Mac with the Option and Command keys held down to rebuild the Desktop file. You may also be able to fix a faulty startup disk by replacing its System file. The error 0F000D most likely means that you have something pressed against the Interrupt button on the progammer's switch. The error 0F0064 means that the startup disk you have inserted into the disk drive is missing the System file. Code Meaning 01____ ROM test 02____ RAM test (Bus subtest) 03____ RAM test (byte write) 04____ RAM test (mod3 test) 05____ RAM test (address uniqueness) 0F0001 Bus error 0F0002 Address error 0F0003 Illegal instruction 0F0004 Zero divide 0F0005 Check trap - CHK instruction 0F0006 Overflow trap - TRAPV instruction 0F0007 Privilege violation 0F0008 Trace trap 0F0009 Trap dispatcher error 0F000A Line 1111 trap 0F000B Other trap 0F000C Unimplemented trap executed 0F000D Interrupt button on programmers switch 0F0064 Bad System file 0F0065 Bad Finder >thanks for any info, You're welcome! -Ted