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SCU User's Manual/Chapter 4 DSP Control LOOP BOOTOM instruction
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BTM
Repeated processing judgment
- Operation details
- When the [LOP] flag is 0, nothing is done; otherwise, the program counter is returned to [TOP].
- descriptive formula
- label: BTM
- instruction code
| 31 | 30 | 29 | 28 | 27 | | | |
| | | | | | | |
| | | | | | | |
| | | | | | | 0 |
| 1 | 1 | 1 | 0 | 0 | − | − | − |
− | − | − | − | − | − | − | − |
− | − | − | − | − | − | − | − |
− | − | − | − | − | − | − | − |
- flag
- LOP;LOP<> It is decremented only when it is 0 (other than 0). It ends when LOP=0.
- remarks
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LPS
1 step repeat execution
- Operation details
- Repeat the next step until the [LOP] register becomes 0.
- descriptive formula
- label: LPS
- instruction code
| 31 | 30 | 29 | 28 | 27 | | | |
| | | | | | | |
| | | | | | | |
| | | | | | | 0 |
| 1 | 1 | 1 | 0 | 1 | − | − | − |
− | − | − | − | − | − | − | − |
− | − | − | − | − | − | − | − |
− | − | − | − | − | − | − | − |
- flag
- LOP;LOP<> It is decremented only when it is 0 (other than 0). It ends when LOP=0.
- remarks
- After processing is completed, the PC executes LOP+1 times and exits.
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★ HARDWARE Manual ★ SCU User's Manual
Copyright SEGA ENTERPRISES, LTD., 1997
