unsigned int    open9(wchar_t *path);     - sd card only, path looks like L"/file.dat"
void            read9(unsigned int handle, void *read_buffer, unsigned int len);
void            write9(unsigned int handle, void *out_buffer, unsigned int len);


.cpu arm946e-s
.arch armv5te

.text
.arm
.align 2

open9:
    STMFD   SP!, {R4-R10,LR}
    SUB     SP, SP, #0x30
    ADD     r7, r0, #0
    LDR     R5, =0x809797C
    LDR     R5, [R5]
    ADD     R5, #8
    LDR     R1, =0x2EA0
    ADD     R0, R5, R1
    ADD     R1, SP, #8
    LDR     R4, =0x8061451
    BLX     R4
    MOV     R3, #0
    STR     R3, [SP,#0x1C]
    STR     R3, [SP]
    STR     R3, [SP,#4]
    ADD     R0, SP, #0x10
    MOV     R1, R5
    LDR     R2, [SP,#8]
    LDR     R3, [SP,#0xC]
    LDR     R4, =0x8063F91
    BLX     R4
    LDR     R6, [SP,#0x1C]
    ADD     R0, SP, #0x24
    MOV     R1, #4
    STR     R1, [R0]
    MOV     R1, #0x1C
    STR     R1, [R0,#8]
    ADD     r1, r7, #0
    STR     R1, [R0,#4]
    MOV     R0, #0
    STR     R0, [SP, #0x20]
    MOV     R3, #7
    STR     R3, [SP]
    STR     R0, [SP,#4]
    ADD     R1, SP, #0x20
    MOV     R2, #0
    ADD     R3, SP, #0x24
    LDR     R10, =0x8084739
    MOV     R0, R6
    BLX     R10
    LDR     R0, [SP, #0x20]
    ADD     SP, SP, #0x30
    LDMFD   SP!, {R4-R10,PC}

read9:
    STMFD   SP!, {R4,LR}
    SUB     SP, SP, #0x20
    ADD     R3, SP, #0x10
    STR     R2, [SP,#0x8]
    LDR     R2, =0x80944C8
    STR     R2, [R3]
    STR     R1, [R3,#4]
    STR     R3, [SP,#0x0]
    MOV     R1, #0
    STR     R1, [SP,#0x4]
    ADD     R1, SP, #0xC
    mov     R2, #0
    MOV     R3, #0
    LDR     R4, [R0]
    LDR     R4, [R4, #0x38]
    BLX     R4
    ADD     SP, SP, #0x20
    LDMFD   SP!, {R4,PC}

write9:
    STMFD   SP!, {R3-R12,LR}
    SUB     SP, SP, #0x20
    ADD     R3, SP, #0x10
    STR     R2, [SP,#0x8]
    LDR     R2, =0x8094490
    STR     R2, [R3]
    STR     R1, [R3,#4]
    STR     R3, [SP,#0x0]
    MOV     R1, #0
    STR     R1, [SP,#0x4]
    ADD     R1, SP, #0xC
    MOV     R2, #0
    MOV     R3, #0
    LDR     R4, [R0]
    LDR     R4, [R4, #0x3C]
    BLX     R4
    ADD     SP, SP, #0x20
    LDMFD   SP!, {R3-R12,PC}

-saved