IBM System/360 Field Engineering Manual page 28

Translate and Test TRT DD SS Dl(L, Bl), D2(B2)
(Same as TR) Addressing
00- All
When the function byte is a zero the next
function
argument byte is translated. Both opr's bytes O
remain unchanged. When the function byte 01- Non-0
is a non-zero the operation is completed. function
The generated argument adr is placed byte met
into GPR 1. The function byte is placed
10 - Last
into GPR 2. function
(Left to right byte by byte) byte
If opr 1 is exhausted before a non-zero cond,
non-0
the opr is completed and GPRs 1 and 2 11- Not used
remain unchanged.
Unpack UNPK F3
SS
Dl(Ll,Bl), Change opr 2 from packed to zoned format
Adr
Unchanged
D2(L2,B2)
and place into opr 1. Prot
(Right to left byte by byte)
(No restrictions on overlapping fields)
(Opr 2 may be extended with hi-order zeros
if opr 1 exceeds the length of opr 2,
thereby inserting zeros in opr 1. )
(lf PSW bit 12
=
1) ASCII Zone code
(If P$W bit 12
=
0) EBCDIC zone code
inserted
zone
ID ID Is I I
z
ID Is ID I
Write Direct WRD
84 SI
Dl(Bl), l2 The 1 byte from the instruction stream Privileged Unchanged
(8-15) is placed on the timing-signal bus- Oper
out, in a form of 8 timing pulses, along Adr
with a 9th pulse at the write-out line.
The 8 bit lines at the direct-control bus-
out lines are brought
up
by opr
1.