Difference between revisions of "Chocobo Check"
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| − | ROUTINE : CHOCOBO CHECK | + | ROUTINE : CHOCOBO CHECK |
| − | + | PARAMETERS: r4 = Unit data pointer | |
| − | + | RETURNS: r2 = 0x00 if unit not mountable (because of status or not a chocobo) | |
| − | + | r2 = 0x01 if unit is a mountable chocobo, already ridden | |
| − | + | r2 = 0x02 if unit is a mountable chocobo with mount info = 0x00 (unit data 0x182) | |
| − | + | -------------------------------------------------------------------------------------------------------------- | |
| − | + | 001743c8: 27bdffe8 addiu r29,r29,0xffe8 | | |
| − | + | 001743cc: afb00010 sw r16,0x0010(r29) | | |
| − | + | 001743d0: 00808021 addu r16,r4,r0 |{{f/std|<nowiki>r16 = unit data pointer</nowiki>}} | |
| − | + | 001743d4: afbf0014 sw r31,0x0014(r29) | | |
| − | + | 001743d8: 92020003 lbu r2,0x0003(r16) |{{f/load|<nowiki>r2 = unit JOB ID</nowiki>}} | |
| − | + | 001743dc: 00000000 nop | | |
| − | 001743c8: 27bdffe8 addiu r29,r29,0xffe8 | + | 001743e0: 2442ffa2 addiu r2,r2,-0x005e |{{f/std|<nowiki>r2 = r2 - 0x5E (Chocobo Job ID = 0x5e)</nowiki>}} |
| − | 001743cc: afb00010 sw r16,0x0010(r29) | + | 001743e4: 2c420003 sltiu r2,r2,0x0003 |{{f/std|<nowiki>r2 = 0x01 if Unit job ID is 0x5e, 0x5f or 0x60 (Note: r2 is unsigned so can only happen for jobs 0x5E - 0x60)</nowiki>}} |
| − | 001743d0: 00808021 addu r16,r4,r0 | + | 001743e8: 10400005 beq r2,r0,0x00174400 {{f/Cond|<nowiki>If Unit has the job chocobo</nowiki>}} /Else branch then jump to {{f/loc|<nowiki>End</nowiki>}} with r2 = 0x00 |
| − | 001743d4: afbf0014 sw r31,0x0014(r29) | + | 001743ec: 02002021 addu r4,r16,r0 |{{f/std|<nowiki>r4 = unit data pointer</nowiki>}} |
| − | 001743d8: 92020003 lbu r2,0x0003(r16) | + | 001743f0: 0c01786c jal 0x0005e1b0 |{{f/jal|Status_Checks_(r5_%3D_set_to_check)|<nowiki>Status_Checks_(r5_%3D_set_to_check)</nowiki>}} Check if unit has a unmountable status - return r2 = 0x01 if so |
| − | 001743dc: 00000000 nop | + | 001743f4: 3405000a ori r5,r0,0x000a |{{f/std|<nowiki>r5 = 0x0A (set to check in the routine above)</nowiki>}} |
| − | 001743e0: 2442ffa2 addiu r2,r2, | + | 001743f8: 10400003 beq r2,r0,0x00174408 {{f/Cond|<nowiki>If unit have one of the checked status / Else branch to mount info check</nowiki>}} |
| − | 001743e4: 2c420003 sltiu r2,r2,0x0003 | + | 001743fc: 00000000 nop |{{f/std|<nowiki> </nowiki>}} |
| − | 001743e8: 10400005 beq r2,r0, | + | 00174400: 0805d107 j 0x0017441c {{f/Cond|<nowiki>Else </nowiki>}} |{{f/jump|<nowiki> jump to </nowiki>{{f/loc|<nowiki>End</nowiki>}}<nowiki> (r2 = 0x00)</nowiki>}} {{f/std|<nowiki> Not a chocobo or chocobo not mountable</nowiki>}} |
| − | 001743ec: 02002021 addu r4,r16,r0 | + | 00174404: 00001021 addu r2,r0,r0 |
| − | 001743f0: 0c01786c jal 0x0005e1b0 | + | 00174408: 92030182 lbu r3,0x0182(r16) {{f/Cond|<nowiki>Else </nowiki>}} {{f/load|<nowiki>r3 = Unit mount info</nowiki>}} {{f/std|<nowiki>(unit has no unmountable status)</nowiki>}} |
| − | 001743f4: 3405000a ori r5,r0,0x000a | + | 0017440c: 00000000 nop | |
| − | 001743f8: 10400003 beq r2,r0, | + | 00174410: 14600002 bne r3,r0,0x0017441c {{f/Cond|<nowiki>if unit is riding or being ridden</nowiki>}} /Else (not ridden) branch to {{f/loc|<nowiki>End</nowiki>}} With r2 = 0x02 |
| − | 001743fc: 00000000 nop | + | 00174414: 34020002 ori r2,r0,0x0002 |{{f/std|<nowiki>r2 = 0x02</nowiki>}} |
| − | 00174400: 0805d107 j | + | 00174418: 34020001 ori r2,r0,0x0001 |{{f/std|<nowiki>r2 = 0x01</nowiki>}} |
| − | 00174404: 00001021 addu r2,r0,r0 | + | 0017441c: 8fbf0014 lw r31,0x0014(r29) |End |
| − | + | 00174420: 8fb00010 lw r16,0x0010(r29) | |
| − | + | 00174424: 27bd0018 addiu r29,r29,0x0018 | |
| − | + | 00174428: 03e00008 jr r31 | |
| − | 00174408: 92030182 lbu r3,0x0182(r16) | + | 0017442c: 00000000 nop |
| − | 0017440c: 00000000 nop | ||
| − | 00174410: 14600002 bne r3,r0, | ||
| − | 00174414: 34020002 ori r2,r0,0x0002 | ||
| − | 00174418: 34020001 ori r2,r0,0x0001 | ||
| − | |||
| − | |||
| − | |||
| − | 0017441c: 8fbf0014 lw r31,0x0014(r29) | ||
| − | 00174420: 8fb00010 lw r16,0x0010(r29) | ||
| − | 00174424: 27bd0018 addiu r29,r29,0x0018 | ||
| − | 00174428: 03e00008 jr r31 | ||
| − | 0017442c: 00000000 nop | ||
| − | |||
== Return Locations == | == Return Locations == | ||
Revision as of 21:14, 3 December 2021
ROUTINE : CHOCOBO CHECK
PARAMETERS: r4 = Unit data pointer
RETURNS: r2 = 0x00 if unit not mountable (because of status or not a chocobo)
r2 = 0x01 if unit is a mountable chocobo, already ridden
r2 = 0x02 if unit is a mountable chocobo with mount info = 0x00 (unit data 0x182)
--------------------------------------------------------------------------------------------------------------
001743c8: 27bdffe8 addiu r29,r29,0xffe8 |
001743cc: afb00010 sw r16,0x0010(r29) |
001743d0: 00808021 addu r16,r4,r0 |r16 = unit data pointer
001743d4: afbf0014 sw r31,0x0014(r29) |
001743d8: 92020003 lbu r2,0x0003(r16) |r2 = unit JOB ID
001743dc: 00000000 nop |
001743e0: 2442ffa2 addiu r2,r2,-0x005e |r2 = r2 - 0x5E (Chocobo Job ID = 0x5e)
001743e4: 2c420003 sltiu r2,r2,0x0003 |r2 = 0x01 if Unit job ID is 0x5e, 0x5f or 0x60 (Note: r2 is unsigned so can only happen for jobs 0x5E - 0x60)
001743e8: 10400005 beq r2,r0,0x00174400 #If Unit has the job chocobo /Else branch then jump to End with r2 = 0x00
001743ec: 02002021 addu r4,r16,r0 |r4 = unit data pointer
001743f0: 0c01786c jal 0x0005e1b0 |-->Status_Checks_(r5_%3D_set_to_check) Check if unit has a unmountable status - return r2 = 0x01 if so
001743f4: 3405000a ori r5,r0,0x000a |r5 = 0x0A (set to check in the routine above)
001743f8: 10400003 beq r2,r0,0x00174408 #If unit have one of the checked status / Else branch to mount info check
001743fc: 00000000 nop |
00174400: 0805d107 j 0x0017441c #Else |>> jump to End (r2 = 0x00) Not a chocobo or chocobo not mountable
00174404: 00001021 addu r2,r0,r0
00174408: 92030182 lbu r3,0x0182(r16) #Else r3 = Unit mount info (unit has no unmountable status)
0017440c: 00000000 nop |
00174410: 14600002 bne r3,r0,0x0017441c #if unit is riding or being ridden /Else (not ridden) branch to End With r2 = 0x02
00174414: 34020002 ori r2,r0,0x0002 |r2 = 0x02
00174418: 34020001 ori r2,r0,0x0001 |r2 = 0x01
0017441c: 8fbf0014 lw r31,0x0014(r29) |End
00174420: 8fb00010 lw r16,0x0010(r29)
00174424: 27bd0018 addiu r29,r29,0x0018
00174428: 03e00008 jr r31
0017442c: 00000000 nop
Return Locations
00174844: Store movement stuff into scratch pad 00174994: Store movement stuff into scratch pad 0017de2c: Check if another unit is on the same Tile
