| Title: | AMIGA NOTES |
| Notice: | Join us in the *NEW* conference - HYDRA::AMIGA_V2 |
| Moderator: | HYDRA::MOORE |
| Created: | Sat Apr 26 1986 |
| Last Modified: | Wed Feb 05 1992 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 5378 |
| Total number of notes: | 38326 |
Could someone who has access to an MC68020 User's Manual tell me what the format of the Special Status Word/Register is. This is the word located at 10(SP) on the bus error stack frame. I have been unable to find a copy and Prentice-Hall says it's no longer available. I have a copy of the MC68030 manual and I've listed its format below. I need to know what the differences are, if any. Also I would like to know if the format for the word at 8(SP) on the same stack frame is listed. Thanks John 15 14 13 12 11 10 9 8 7 6 5-4 3 2 - 0 |FC|FB|RC|RB|X |X |X |DF|RM|RW|SIZE|X |FC2-FC0| FC - Fault on State C of the Instruction Pipe FB - Fault on State C of the Instruction Pipe RC - Rerun Flag for State B of the Instruction Pipe* RB - Rerun Flag for State B of the Instruction Pipe* DF - Fault/Rerun Flag for Data Cycle * RM - Read-Modify-Write on Data Cycle RW - Read/Write for Data Cycle - 1=Read,0=Write SIZE - Size Code for Data Cycle FC0-FC2 - Address Space For Data Cycle *1=Rerun Faulted bus Cycle, or Run Pending Prefetch 0=Do Not Rerun Bus Cycle X=For Internal Use Only
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2948.1 | You are correct.. | PUERTO::ALVAREZ | So much work to do...so little time | Fri Sep 22 1989 16:07 | 8 |
John,
The Special Status Word format is exactly as you describe in
.0. Sorry, I couldn't find the format for word at offset $08. It's
listed as an Internal Register, and it mentions that it contains
registers not visible to users.
Miguel A. Alvarez
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