From 86f6b7f3d6b9096ec5055dba8f9a9a4a0d2a0d39 Mon Sep 17 00:00:00 2001
From: phil <phil@ultimate.com>
Date: Tue, 24 Aug 2021 15:37:00 -0400
Subject: [PATCH] src/cmd/t8.s (TMG): add opcode comments extraced from
 sys/sop.s

---
 src/cmd/t8.s | 86 ++++++++++++++++++++++++++--------------------------
 1 file changed, 43 insertions(+), 43 deletions(-)

diff --git a/src/cmd/t8.s b/src/cmd/t8.s
index db67d3a..7daed34 100644
--- a/src/cmd/t8.s
+++ b/src/cmd/t8.s
@@ -4,50 +4,50 @@
 " no iot ops are defined
 " system cal entries are defined
 "
-dac = 0040000
-jms = 0100000
-dzm = 0140000
-lac = 0200000
-xor = 0240000
-add = 0300000
-tad = 0340000
-xct = 0400000
-isz = 0440000
-and = 0500000
-sad = 0540000
-jmp = 0600000
-eae = 0640000
-i = 020000
-opr = 0740000
-law = opr i
-cma = opr 1
-cml = opr 2
-ral = opr 010
-rar = opr 020
-sma = opr 0100
-sza = opr 0200
-snl = opr 0400
-skp = opr 01000
-spa = opr 01100
-sna = opr 01200
-szl = opr 01400
-cll = opr 04000
-cla = opr 010000
-las = opr 010004
-lrs = eae 0500
-lrss = i lrs
-lls = eae 0600
-llss = i lls
-als = eae 0700
-alss = i als
-lacq = eae 01002
-lacs = eae 01001
-clq = eae 010000
-omq = eae 2
-cmq = eae 4
-lmq = eae 012000
+dac = 0040000		" MEM: deposit AC
+jms = 0100000		" MEM: jump to subroutine
+dzm = 0140000		" MEM: deposit zero to memory
+lac = 0200000		" MEM: load AC
+xor = 0240000		" MEM: XOR with AC
+add = 0300000		" MEM: one's complement add
+tad = 0340000		" MEM: two's complement add
+xct = 0400000		" MEM: execute
+isz = 0440000		" MEM: increment and skip if zero
+and = 0500000		" MEM: AND
+sad = 0540000		" MEM: skip if AC different
+jmp = 0600000		" MEM: jump
+eae = 0640000		" Extended Arithmetic Element
+i = 020000		" indirect
+opr = 0740000		" Operator (bit encoded)
+law = opr i		" OPR: load accumulator with (instr)
+cma = opr 1		" OPR: complement AC
+cml = opr 2		" OPR: complement LINK
+ral = opr 010		" OPR: rotate AC left
+rar = opr 020		" OPR: rotate AC right
+sma = opr 0100		" OPR: skip on minus AC
+sza = opr 0200		" OPR: skip on zero AC
+snl = opr 0400		" OPR: skip on non-zero link
+skp = opr 01000		" OPR: skip unconditionally
+spa = opr 01100		" OPR: skip on positive AC
+sna = opr 01200		" OPR: skip on non-zero AC
+szl = opr 01400		" OPR: skip on zero link
+cll = opr 04000		" OPR: clear link
+cla = opr 010000	" OPR: clear AC
+las = opr 010004	" OPR: load AC from switches
+lrs = eae 0500		" EAE: long right shift
+lrss = i lrs		" EAE: long right shift, signed
+lls = eae 0600		" EAE: long left shift
+llss = i lls		" EAE: long left shift, signed
+als = eae 0700		" EAE: AC left shift
+alss = i als		" EAE: AC left shift, signed
+lacq = eae 01002	" EAE: load AC with MQ
+lacs = eae 01001	" EAE: load AC with SC (not used)
+clq = eae 010000	" EAE: clear MQ
+omq = eae 2		" EAE: OR MQ into AC
+cmq = eae 4		" EAE: complement MQ
+lmq = eae 012000	" EAE: load MQ from AC
 
-sys = i
+sys = i			" CAL instruction w/ indirect bit
 save = 1
 open = 3
 read = 4