UTMACCTL  

distilled: @UP0 UTMACCTL.???0;

key: UTMACCTL

0123456701234567012345670123456701234567012345670123456701234567
100111011001predicate000000000000000000000000000000000000000000000000
0123456701234567012345670123456701234567012345670123456701234567
0000000000000000000modi 1000000000000000000000stallyr-barw-barb-maskreuse00

Modifier Group 1
0???0.
1IVALL.

UTMACCTL   [UR]
READ UR (2 slots)

distilled: @UP0 UTMACCTL.IV [UR0] ;

key: UTMACCTL_UR

0123456701234567012345670123456701234567012345670123456701234567
100111011001predicate00000000operand 0000000000000000000000000000000000
0123456701234567012345670123456701234567012345670123456701234567
000000000000000000modi 10000000010000000000000stallyr-barw-barb-maskreuse00

Modifier Group 1
0IV.
1PF.