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Routines |
| Prev: 52102 | Up: Map | Next: 52290 |
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Used by the routines at HandleOutlaw and TurnSheriff.
Sets the flip bit and the walking-frame set from FacingFlags. When ViewRotation is set, the heading is XORed with two so opposite headings swap.
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Keep the heading in the lowest two bits.
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| SetFacingFlags | 52243 | LD A,(IX+6) | Fetch the heading. | |||||
| 52246 | RLCA | Move the heading into the lowest two bits. | ||||||
| 52247 | RLCA | |||||||
| 52248 | AND %00000011 | Keep only the heading. | ||||||
| 52250 | LD L,A | Keep it in L. | ||||||
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XOR the heading with two if ViewRotation is set.
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| 52251 | LD A,(41576) | Fetch ViewRotation. | ||||||
| 52254 | ADD A,A | Double it. | ||||||
| 52255 | XOR L | XOR it with the heading. | ||||||
| 52256 | LD L,A | Keep the index in L. | ||||||
| 52257 | LD H,0 | Clear H. | ||||||
| 52259 | LD BC,52414 | Point BC at FacingFlags. | ||||||
| 52262 | ADD HL,BC | Find the entry. | ||||||
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Set bits 6 and 7 of the flags.
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| 52263 | LD A,(HL) | Fetch the entry. | ||||||
| 52264 | AND %11000000 | Keep bits 6 and 7. | ||||||
| 52266 | LD C,A | Keep them in C. | ||||||
| 52267 | LD A,(IX+7) | Fetch the flags. | ||||||
| 52270 | AND %00111111 | Clear bits 6 and 7. | ||||||
| 52272 | OR C | Set them from the table. | ||||||
| 52273 | LD (IX+7),A | Set the flags. | ||||||
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Set bit 2 of the walking frame.
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| 52276 | LD A,(HL) | Fetch the entry again. | ||||||
| 52277 | AND %00000100 | Keep bit 2. | ||||||
| 52279 | LD C,A | Keep it in C. | ||||||
| 52280 | LD A,(IX+12) | Fetch the walking frame. | ||||||
| 52283 | AND %11111011 | Clear bit 2. | ||||||
| 52285 | OR C | Set it from the table. | ||||||
| 52286 | LD (IX+12),A | Set the walking frame and return. | ||||||
| 52289 | RET | |||||||
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View the equivalent code in;
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| Prev: 52102 | Up: Map | Next: 52290 |