Recently, I was faced with the trauma of a blown power supply on my Mac Plus
(my second in just under a year), which also took out the motherboard. I was
concerned about losing my extra memory and did some digging about what the Sad
Mac error codes mean. It turns out that there are no details in any of the
publications from Apple, including the Inside Macintosh set. After digging
through some back issues of my favorite magazines, I came across only two
articles which mentioned what the cryptic Sad Mac error codes meant.
I have summarized the information from the two articles (my thanks to the
authors, whoever you are) and included a list of what some of the codes mean.
IF ANY ONE HAS A SIMILAR LIST FOR THE OTHER MACINTOSH MODELS,
I WOULD LIKE VERY MUCH TO HEAR FROM YOU.
I hope you find this information useful :')
Sad Mac Error Codes for Mac Plus
The first two digits of the six-digit error code beneath the Sad Mac icon is the
Class Code. The last four digits is the Sublclass Code.
The most commonly encountered Class codes are 02, 03, 04, and 05, all of which
indicate a RAM problem. You might try reseating the SIMMs in their sockets. If
this doesn't do the job, see Note 1 below.
A Class code of 01 indicates the ROM test failed at start-up. Pack up your Mac
and head to you nearest dealer for repair.
A Class code of 0F indicates some sort of software error. This could indicate
several things, including ROMs which are no longer valid or some sort of add-in
equipment problem (ie: inproperly installed).
Code Notes Meaning
01xxxx ROM test
02xxxx 1 RAM test-bus subtest
03xxxx 1 RAM test-byte write test
04xxxx 1 RAM test-mod3 (pattern) test
05xxxx 1 RAM test-address uniqueness test
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
0F0065 2 Bad System File
0F0065 Bad Finder
Notes: 1. The last four digits indicate which of the four memory modules have
failed. If the last two digits are nonzero, SIMMs 1 and 3 may be bad.
If the middle two digits are nonzero, SIMMs 2 and 4 may be bad. To find
the bad SIMM, exchange each suspect SIMM in turn with a good SIMM.
When the Sad Mac code changes, the SIMM you just replaced is bad.
2. Macs with 64K ROM fail with codes 0F064 and 0F065 if the System and
Finder (or other star-up applications) are misssing, but the 128K ROM
recognizes the problem and ejects the disk instead.
Taylor Leaming |
Evans & Sutherland Computer Corp. | Does anyone have a really good
Salt Lake City, UT (huh?) | disclaimer I could use?
(801) 582-5847 |