Motorola Opcode

Understand Motorola Opcode

Like many of you, I was not paying much attention to the motorola opcodes, until recently I find the opcodes can be quite handy. This post will show you how to use the motorola opcodes. It is not that difficult if you know how to convert between Decimal (Dec) & Hexadecimal (Hex) values. Opcodes can be used to read & write SEEM, and restart phone, using your phone instead of the computer.

Legend:
[menu] = Menu key
[OK] = Right soft key "OK"

To get to the OpCode screen, press the following keys in sequence & quickly:
[menu] 0 4 8 2 6 3 *

If you can't get the OpCode screen, maybe it is not enabled in your phone. To enable Opcode Menu, do the following seem edit: (don't know seem edit? read this guide.)
SEEM 0032 offset 36 bit 4: (set on)

How to enter opcodes:
1. key "[menu] 0 4 8 2 6 3 *" to enter opcode screen
2. key opcode string, such as 32*91*1*31*1
3. press right soft key [OK]

Major Opcodes:
32 - read seem
47 - write seem
34 - restart

Opcode Syntax:

Restart phone:
34 [OK]

Read seem:
[Opcode]*[field1]*[field2]*[field3]*[field4]

Example: 32*91*1*31*1
Explanation:
This opcode reads Hex value from offset 1F in SEEM 0005B-0001.
[Opcode] 32 = SEEM reading opcode
[field1] 91 = seem ID in Dec value. (91 is 005B, 50 is 0032)
[field2] 1 = seem record number in Dec value. (1 = 0001, 10 = 000A)
[field3] 31 = offset in Dec value. (31 = offset 1F)
[field4] 1 = number of bytes to read (1 means reading only offset 2F, 2 means reading offsets 2F & 30, etc.) If you put 0 for both field3 & field4, it will read all offsets in the seem record.

Write seem:
[Opcode]*[field1]*[field2]*[field3]*[field4]*[field5]

Example: 47*91*1*31*1*043
Explanation:
This opcode writes Hex value 2B to offset 1F in SEEM 0005B-0001.
[Opcode] 47 = SEEM writing opcode
[field1] 91 = seem ID in Dec value. (91 is 005B, 50 is 0032)
[field2] 1 = seem record number in Dec value. (1 = 0001, 10 = 000A)
[field3] 31 = offset in Dec value. (31 = offset 1F)
[field4] 1 = number of bytes to read (1 means reading only offset 2F, 2 means reading offsets 2F & 30, etc.)
[field5] 043 = value to write in Dec value, must be block of 3 digit. If you put 2 for field4, you should put 2 blocks in this field. For example, 043043 (043 = writing Hex 2B to the offset)

Results:
F1: 0 means successful, 1 failed.
F2(d): the hex value of the specified offset(s) (For seem reading only)

How to convert Dec value to bits:
The formula:
Dec value = bit0 x 1 + bit1 x 2 + bit2 x 4 + bit3 x 8 + bit4 x 16 + bit5 x 32 + bit6 x 64 + bit7 x 128
(bit value is either 0 or 1.)

If you don't understand, don't worry. I will show you some useful opcodes in coming posts.

Sponsors links: