Final Fantasy IX/ROM map/CD4

The following article is a ROM map for Final Fantasy IX/ROM map.

Encounter check

00038d3c: 3c028008 lui r2,0x8008
00038d40: 8c44aecc lw r4,-0x5134(r2)
00038d44: 27bdffe0 addiu r29,r29,0xffe0
00038d48: afbf001c sw r31,0x001c(r29)
00038d4c: afb20018 sw r18,0x0018(r29)
00038d50: afb10014 sw r17,0x0014(r29)
00038d54: afb00010 sw r16,0x0010(r29)
00038d58: 908216ec lbu r2,0x16ec(r4)
00038d5c: 00000000 nop
00038d60: 10400096 beq r2,r0,0x00038fbc
00038d64: 00008021 addu r16,r0,r0
00038d68: 3c038008 lui r3,0x8008
00038d6c: 8c62ae4c lw r2,-0x51b4(r3)
00038d70: 00000000 nop
00038d74: 284203c1 slti r2,r2,0x03c1
00038d78: 14400091 bne r2,r0,0x00038fc0
00038d7c: 0010102b sltu r2,r0,r16
00038d80: 3c128008 lui r18,0x8008
00038d84: ac60ae4c sw r0,-0x51b4(r3)
00038d88: 908316ef lbu r3,0x16ef(r4)		;r3 = encounter rate
00038d8c: 8e42ae50 lw r2,-0x51b0(r18)
00038d90: 3c118008 lui r17,0x8008
00038d94: 00431021 addu r2,r2,r3		;r2 = cumulative encounter rate
00038d98: ae42ae50 sw r2,-0x51b0(r18)		;store cumulative encounter rate in 0x8007ae50
00038d9c: 3c028008 lui r2,0x8008
00038da0: 8e23b720 lw r3,-0x48e0(r17)
00038da4: 2442b92d addiu r2,r2,0xb92d
00038da8: 0062182b sltu r3,r3,r2
00038dac: 14600003 bne r3,r0,0x00038dbc
00038db0: 00000000 nop
00038db4: 0c012fc8 jal 0x0004bf20
00038db8: 00000000 nop
00038dbc: 8e22b720 lw r2,-0x48e0(r17)
00038dc0: 8e43ae50 lw r3,-0x51b0(r18)
00038dc4: 90440000 lbu r4,0x0000(r2)
00038dc8: 24420001 addiu r2,r2,0x0001
00038dcc: 000318c3 sra r3,r3,0x03
00038dd0: 0083202a slt r4,r4,r3
00038dd4: 10800079 beq r4,r0,0x00038fbc
00038dd8: ae22b720 sw r2,-0x48e0(r17)
00038ddc: 3c028008 lui r2,0x8008
00038de0: 8c43b708 lw r3,-0x48f8(r2)
00038de4: 24020001 addiu r2,r0,0x0001
00038de8: 10620005 beq r3,r2,0x00038e00
00038dec: ae40ae50 sw r0,-0x51b0(r18)
00038df0: 0c02eeea jal 0x000bbba8
00038df4: 3c108008 lui r16,0x8008
00038df8: 0800e383 j 0x00038e0c
00038dfc: 00408821 addu r17,r2,r0