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Routines |
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Used by the routine at MoveObject.
Makes a signed number into a signed word.
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Put the number in the low byte. The high byte is zero, or FF if the number is negative.
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| SignExtendA | E0E5 | LD L,A | Make the number the low byte. | |||||||||
| E0E6 | XOR A | Start with a high byte of zero. | ||||||||||
| E0E7 | BIT 7,L | Jump to SignExtendA_Set if the number is not negative. | ||||||||||
| E0E9 | JR Z,SignExtendA_Set | |||||||||||
| E0EB | CPL | Use FF for the high byte if the number is negative. | ||||||||||
| SignExtendA_Set | E0EC | LD H,A | Set the high byte. | |||||||||
| E0ED | RET | Return. | ||||||||||
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View the equivalent code in;
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