A(0x08) getc

00004024: 27bdffd8 addiu r29,r29,-0x0028
00004028: afbf0014 sw r31,0x0014(r29)
0000402c: 27a50024 addiu r5,r29,0x0024
00004030: 0c000aca jal 0x00002b28          A(0x02) read (fd = p1, dst = sp + 0x24, length = 1)
00004034: 24060001 addiu r6,r0,0x0001      
00004038: 1c400004 bgtz r2,0x0000404c      branch if could read byte
0000403c: 83a20024 lb r2,0x0024(r29)       the byte that was read
00004040: 10000006 beq r0,r0,0x0000405c
00004044: 2402ffff addiu r2,r0,-0x0001     if failed, return -1
00004048: 83a20024 lb r2,0x0024(r29)
0000404c: 00000000 nop
00004050: 304200ff andi r2,r2,0x00ff       else,
00004054: 00021600 sll r2,r2,0x18
00004058: 00021603 sra r2,r2,0x18          for some reason, expand the sign. this means a read of ff could look like an error, even if it isn't. this is very good design.
0000405c: 8fbf0014 lw r31,0x0014(r29)
00004060: 27bd0028 addiu r29,r29,0x0028
00004064: 03e00008 jr r31
00004068: 00000000 nop