MHELP operand mapping
The MHELP operand field is actually mapped into a fullword.
The predefined MHELP codes correspond to the fourth byte of this
fullword, while the &SYSNDX limit is controlled by setting any bit
in the third byte to 1. If all bits in the third byte are 0, then
the &SYSNDX limit is not set.
The bit settings for bytes 3 and 4 are shown in
Table 62.
Table 62. &SYSNDX Control Bits
| Byte |
Description |
| Byte 3 - &SYSNDX control |
- 1... ....
- Bit 0 = 1. Value=32768. Limit &SYSNDX to 32768.
- .1.. ....
- Bit 1 = 1. Value=16384. Limit &SYSNDX to 16384.
- ..1. ....
- Bit 2 = 1. Value=8192. Limit &SYSNDX to 8192.
- ...1 ....
- Bit 3 = 1. Value=4096. Limit &SYSNDX to 4096.
- .... 1...
- Bit 4 = 1. Value=2048. Limit &SYSNDX to 2048.
- .... .1..
- Bit 5 = 1. Value=1024. Limit &SYSNDX to 1024.
- .... ..1.
- Bit 6 = 1. Value=512. Limit &SYSNDX to 512.
- .... ...1
- Bit 7 = 1. Value=256. Limit &SYSNDX to 256.
|
| Byte 4 |
- 1... ....
- Bit 0 = 1. Value=128. MHELP Suppression.
- .1.. ....
- Bit 1 = 1. Value=64. Macro Hex Dump.
- ..1. ....
- Bit 2 = 1. Value=32. Global Suppression.
- ...1 ....
- Bit 3 = 1. Value=16. Macro Entry Dump.
- .... 1...
- Bit 4 = 1. Value=8. Macro Exit Dump.
- .... .1..
- Bit 5 = 1. Value=4. Macro AIF Dump.
- .... ..1.
- Bit 6 = 1. Value=2. Macro Branch Trace.
- .... ...1
- Bit 7 = 1. Value=1. Macro Call Trace.
|
Note:
You can use any combination of bit settings in any byte of the
MHELP fullword to set the limit, provided at least one bit in byte 3 is
set. This explains why not all values between 65792 and 9999999 can be
used to set the limit. For example, the number 131123 does not set the
&SYSNDX limit because none of the bits in byte 3 are set to 1.
Examples:
MHELP 256 Limit &SYSNDX to 256
MHELP 1 Trace macro calls
MHELP 65536 No effect. No bits in bytes 3,4
MHELP 65792 Limit &SYSNDX to 65792
See Figure 46 for more examples.
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