LDDR |
Repeating block load with decrement. | |||||||||
| Function: | (DE)
(HL); DE
DE - 1; HL
HL -1; BC
BC - 1Repeat until BC = 0 |
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| Format: |
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byte 1: ED |
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byte 2: B8 |
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| Description: | The contents of the memory location addressed by HL are loaded into the memory location addressed by DE. Then BC, DE, and HL are all decremented. If B  0, then the program counter is decremented by 2 and the instruction re-executed. |
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| Data Flow: | ||||||||||
| Timing: | B 0: 5 M cycles; 21 T states: 10.5 usec @ 2 MHz B = 0: 4 M cycles; 16 T states: 8 usec @ 2 MHz |
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| Addressing Mode: | indirect |
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| Flags: |  |
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| Example: | LDDR |
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OBJECT CODE |
Before: |
After: |
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