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Routines |
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29912 | LD HL,58888 | Decrement Sam's main action timer in byte 8 of his buffer | |||||
29915 | DEC (HL) | ||||||
29916 | RET NZ | Return unless it's time to deal with Sam | |||||
29917 | LD HL,29939 | We will continue at 29939 (below) after calling the routine to handle Sam | |||||
29920 | PUSH HL | ||||||
29921 | LD L,198 | HL=29894 | |||||
29923 | LD A,(32764) | Pick up Sam's status flags from 32764 | |||||
29926 | INC L | Point HL at one of the entries in the table of Sam-handling routine addresses at 29896 | |||||
29927 | INC L | ||||||
29928 | RLCA | ||||||
29929 | JR NC,29926 | ||||||
29931 | LD C,(HL) | Collect the routine address into BC | |||||
29932 | INC L | ||||||
29933 | LD B,(HL) | ||||||
29934 | PUSH BC | Push it onto the stack, ready for an indirect jump | |||||
29935 | LD HL,58880 | Point HL at byte 0 of Sam's buffer | |||||
29938 | RET | Make an indirect jump to the Sam-handling routine | |||||
We come here after the Sam-handling routine has returned.
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29939 | LD HL,32764 | 32764 holds Sam's status flags | |||||
29942 | LD A,(HL) | Pick them up in A | |||||
29943 | AND A | Has Sam finished the action yet? | |||||
29944 | RET Z | Return with the zero flag set if so | |||||
29945 | LD A,(58888) | Collect Sam's main action timer from byte 8 of his buffer | |||||
29948 | AND A | Did the Sam-handling routine set the action timer to a non-zero value (meaning that the action is still in progress)? | |||||
29949 | RET NZ | Return with the zero flag reset if so | |||||
29950 | LD (HL),A | Otherwise clear all of Sam's status flags at 32764 | |||||
29951 | RET | Return with the zero flag set |
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