Sad Mac Error Codes: Revision history

25 September 2026

• curprev 02:3102:31, 25 September 2026 Josh talk contribs 35,712 bytes +929 Link Apple's OS 8.1 Emergency Handbook and the MacsBug guide from the Sad Mac page - both were reachable from no article undo

23 September 2026

• curprev 23:3323:33, 23 September 2026 Josh talk contribs 34,783 bytes +17 House style: rephrase the corrections as statements about the facts rather than about this page's own history undo
• curprev 23:2823:28, 23 September 2026 Josh talk contribs 34,766 bytes 0 Fix the remaining FFFFTTEE to FFFFEETT for consistency with the rest of the page undo
• curprev 23:2723:27, 23 September 2026 Josh talk contribs 34,766 bytes +552 Verification drive: labelled as {{Original research}} per the wiki's own policy for native decoding work. Fixed internal inconsistencies: the expanded line-1 layout is FFFFEETT not FFFFTTEE (the page's own worked example, the extended exception list and the decoder gadget all put the exception in the upper byte of the lower word); the intro example called RAM Bank A test 03 when the page's own table makes it 04; the per-ROM checksum Test Manager command was given as test 04 (RAM Bank A) rathe... undo

20 May 2026

• curprev 21:0721:07, 20 May 2026 Josh talk contribs 34,214 bytes −12 No edit summary undo Tag: Visual edit
• curprev 20:4420:44, 20 May 2026 Josh talk contribs 34,226 bytes +51 →Test Manager (Serial Diagnostic Mode) undo Tag: Visual edit
• curprev 20:4220:42, 20 May 2026 Josh talk contribs 34,175 bytes −169 No edit summary undo Tag: Visual edit
• curprev 20:3420:34, 20 May 2026 Josh talk contribs 34,344 bytes −312 No edit summary undo Tag: Visual edit
• curprev 20:2920:29, 20 May 2026 Josh talk contribs 34,656 bytes +30,262 Major expansion: full 68k coverage (Mac II family, LC, Performa, Centris, Quadra, Portable), Chimes of Death taxonomy, Test Manager, worked examples; fix RAM bitmask typos (duplicate F8 / Data Bit 12). undo

3 April 2025

• curprev 09:4909:49, 3 April 2025 Josh talk contribs 4,394 bytes +42 No edit summary undo

12 March 2025

• curprev 17:1317:13, 12 March 2025 Josh talk contribs 4,352 bytes +38 No edit summary undo
• curprev 17:0017:00, 12 March 2025 Josh talk contribs 4,314 bytes −5,033 →Diagnostic Serial Console for Macintosh Plus, SE, and SE/30 undo
• curprev 16:5616:56, 12 March 2025 Josh talk contribs 9,347 bytes +237 →Diagnostic Serial Console for Macintosh Plus, SE, and SE/30 undo Tag: Visual edit
• curprev 16:5316:53, 12 March 2025 Josh talk contribs 9,110 bytes +4,038 →Diagnostic Serial Console (Mac SE/SE30) undo
• curprev 16:4416:44, 12 March 2025 Josh talk contribs 5,072 bytes +375 →SE/30 Specific Issues: Simasimac undo Tag: Visual edit
• curprev 16:3516:35, 12 March 2025 Josh talk contribs 4,697 bytes +419 No edit summary undo
• curprev 16:1216:12, 12 March 2025 Josh talk contribs 4,278 bytes +4,278 Created page with "The "Sad Mac" icon indicates a hardware issue encountered by your Macintosh during startup. Below is a comprehensive guide to understanding and diagnosing Sad Mac error codes. == Original ROMs (Macintosh 128K, 512K, 512Ke, Plus) == When you press the interrupt button on your Macintosh during startup, a Sad Mac icon with code '''0F000D''' appears, indicating a memory test. Sad Mac codes are structured in two parts: * The first two characters are the '''Class Code'''..." Tag: Visual edit: Switched