diff --git a/src/syseng/11sim.427 b/src/syseng/11sim.427
index b8f3bb9e..f241d3d1 100644
--- a/src/syseng/11sim.427
+++ b/src/syseng/11sim.427
@@ -9229,7 +9229,9 @@ DGTRM:	PUSHJ	P,DGNUM		;TRY TO GET NUMBER.
 	[ERROR [ASCIZ/U/]]
 	DRSPEC		;SOB, MARK, SPL.
 	DRASH		;MUL, DIV, ASH, ASHC.
-	REPEAT 3,DGTSER
+	DRFPMS		;2-OP FP11 INSN, MEMORY SOURCE.
+	DRFPMD		;2-OP FP11 INSN, MEMORY DESTINATION.
+	DGTSER
 
 ;JRST THRU STE TO HERE TO GET VALUE OF REGISTER SYMBOL.
 DGVREG:	SETOM	DGVRGP
@@ -9715,6 +9717,35 @@ DRSOB1:	MOVNS	T2	;IN SOB, OFFSET IS SUBTRACTED (ADDED FOR BRANCHES)
 	 JRST	DRSOB2	;TOO LARGE OR FORWARD.
 	JRST	DREMT2
 
+;HANDLE 2-OP FP11 INSN, MEMORY SOURCE.
+DRFPMS:	PUSHJ	P,DRINSP
+	PUSHJ	P,DRADDR	;GET 1ST ADDRESS.
+	LSH	I1,8.		;PUT IN WITH OP CODE.
+	MOVEM	T3,%S		;THIS IS THE SOURCE OPERAND.
+	ADDI	I1,(T2)
+	CAIN	T0,",		;SKIP OVER A COMMA.
+	GETCHR
+	PUSHJ	P,DRFPAC	;GE FP11 ACCUMULATOR.
+	MOVEI	T3,(T2)
+	TLO	T3,REGBIT+.5KBIT
+	LSH	T2,6
+	JRST	DR2AR1
+
+;HANDLE 2-OP FP11 INSN, MEMORY DESTINATION.
+DRFPMD:	PUSHJ	P,DRINSP
+	PUSHJ	P,DRFPAC	;GET FP11 ACCUMULATOR.
+	LSH	I1,2		;MAKE ROOM FOR REG. NUM.
+	MOVEI	T3,(T2)		;PREPARE TO SET %S
+	TLO	T3,REGBIT+.5KBIT	;TO A REG. NUM.
+	JRST	DR2AR2
+
+DRFPAC:	PUSHJ	P,DGVPSP	;GET ACCUMULATOR NO.
+	MOVEI	T2,(T2)
+	SKIPE	DGVALP		;IF NO NUMBER,
+	 CAILE	T2,3		;OR OUT OF RANGE,
+	  JRST	DERR		;(>7), ERROR.
+	POPJ	P,
+
 ;HANDLE JSR, RTS.
 DRJSR:	PUSHJ	P,DRINSP
 	PUSHJ	P,DRJSR1	;READ REG. NUM.
@@ -12078,6 +12109,41 @@ IRP INSN,,[HALT,WAIT,RTI,BPT,IOT,RESET,RTT]
 	INSNUM
 	INSNUM==INSNUM+1
 TERMIN
+
+IRP INSN,,[CFCC,SETF,SETI,SETD,SETL]
+	SIXBIT/INSN/
+	INSNUM
+TERMIN
+
+	INSNUM==1701
+IRP INSN,,[LDFPS,STFPS,STST,CLRF,TSTF,ABSF,NEGF]
+	SIXBIT/INSN/
+	3,,INSNUM
+	INSNUM==INSNUM+1
+TERMIN
+
+	INSNUM==362
+IRP INSN,,[MULF,MODF,ADDF,LDF,SUBF,CMPF]
+	SIXBIT/INSN/
+	15,,INSNUM
+	INSNUM==INSNUM+1
+TERMIN
+	SIXBIT/STF/
+	16,,370
+	SIXBIT/DIVF/
+	15,,371
+	SIXBIT/STEXP/
+	16,,372
+	SIXBIT/STCFI/
+	16,,373
+	SIXBIT/STCFF/
+	16,,374
+	SIXBIT/LDEXP/
+	15,,375
+	SIXBIT/LDCIF/
+	15,,376
+	SIXBIT/LDCFF/
+	15,,377
 
 SYMDRG:
 IRPS AA,,[