IBM CPC700 User Manual page 27

JTAG
The IEEE 11.49.1 (JTAG) Boundary scan is included to facilitate tester requirements as well as for the
support of board level testing and debug.
The following JTAG commands are supported by the CPC700 JTAG TAP controller:
1. EXTEST
2. SAMPLE/PRELOAD
3. BYPASS
4. CLAMP
5. IDCODE
6. USERCODE
The CPC700 IDCODE value is 14940049. The CPC700 USERCODE value is 0.
Refer to IEEE 1149.1 specification for details on JTAG operation.
CPC700 User's Manual—Preliminary 1-11