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Routines |
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The update routine for the remote control block (object 80), the pad which tells the robot to stop. It is pressed when its vertical speed is not zero. The command is 01; bit 7 of RemoteControlCommand is left as it was.
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Send the stop command if something has landed.
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| HandleRemoteControlBlock | AA4D | CALL SetPixelAdjustments | Call SetPixelAdjustments. | |||||
| AA50 | LD A,(IX+$0B) | Fetch the vertical speed. | ||||||
| AA53 | AND A | Return if nothing has landed. | ||||||
| AA54 | RET Z | |||||||
| AA55 | XOR A | Write 00 to the vertical speed. | ||||||
| AA56 | LD (IX+$0B),A | |||||||
| AA59 | LD HL,$5B42 | Point HL at RemoteControlCommand. | ||||||
| AA5C | LD A,(HL) | Fetch the command. | ||||||
| AA5D | AND %10000000 | Keep bit 7. | ||||||
| AA5F | OR %00000001 | Set the command to 01. | ||||||
| AA61 | LD (HL),A | Set RemoteControlCommand. | ||||||
| AA62 | RET | Return. | ||||||
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