diff --git a/instructionList.txt b/instructionList.txt
index 99c0d0b..af89023 100644
--- a/instructionList.txt
+++ b/instructionList.txt
@@ -84,6 +84,10 @@ and c        AA  1  A&=C, set zero flag
 ior c        AB  1  A|=C, set zero flag
 xor c        AC  1  A^=C, set zero flag
 ann c        AD  1  A&=~C, set zero flag
+adb a        BE  1  B+=A, set flags
+sbb a        BF  1  B-=A, set flags
+adc a        4E  1  C+=A, set flags
+sbc a        4F  1  C-=A, set flags
 
 Jumps (J):
 jmp imm16    60  3  I=imm16
@@ -172,10 +176,10 @@ ldp *q       94  3  P=*Q
 ldq *q       95  3  Q=*Q
 stp *q       7C  3  *Q=P
 stq *p       7D  3  *P=Q
-ldq *p++     CC  3  Q=*P++
-ldp *q++     CD  3  P=*Q++
-stp *q++     CE  3  *Q++=P
-stq *p++     CF  3  *P++=Q
+ldq *p++     CC  3  Q=*P++++
+ldp *q++     CD  3  P=*Q++++
+stp *q++     CE  3  *Q++++=P
+stq *p++     CF  3  *P++++=Q
 
 Moves (M):
 lda b        80  1  A=B
@@ -197,20 +201,20 @@ ldq p        8E  1  Q=P
 lds p        8F  1  S=P
 ldv p        90  1  V=P
 
-Opcodes used: 183/255
+Opcodes used: 187/255
      0123456789ABCDEF
 00 | C---------------
 10 | UUIIUIIUUUUUUUUU
 20 | BWWWAWBBBBBUUUU-
 30 | JJJJJJJ---------
-40 | SSSSSSSSSSXXX---
+40 | SSSSSSSSSSXXX-AA
 50 | BBBBBBBBBBBBBBBB
 60 | JBBJJJJJWWWWWWWW
 70 | AAAAAAAAAAWWWWWW
 80 | MMMMMMMMMMMMMMMM
 90 | MMWWWWBBBAAAAAAA
 A0 | AAAAAAAAAAAAAAAA
-B0 | AAAAAAAAAAAAAA--
+B0 | AAAAAAAAAAAAAAAA
 C0 | BBBBBBBBBBBBWWWW
 D0 | ----------------
 E0 | ----------------
diff --git a/rom-8608-defs.lua b/rom-8608-defs.lua
index 4e002bd..a2b148d 100644
--- a/rom-8608-defs.lua
+++ b/rom-8608-defs.lua
@@ -187,6 +187,10 @@ instructions = {
 	{ mnem="ior c"      , opcode=0xAB,                                                            {"aluA",          "alurC","aluIor",                                    "aluSaveNZ","instrNext"}, desc="A|=C, set zero flag" },
 	{ mnem="xor c"      , opcode=0xAC,                                                            {"aluA",          "alurC","aluXor",                                    "aluSaveNZ","instrNext"}, desc="A^=C, set zero flag" },
 	{ mnem="ann c"      , opcode=0xAD,                                                            {"aluA",          "alurC","aluAnd","aluRInv",                          "aluSaveNZ","instrNext"}, desc="A&=~C, set zero flag" },
+	{ mnem="adb a"      , opcode=0xBE,                                                            {"aluB",          "alurA","aluAdd",                     "aluSaveCarry","aluSaveNZ","instrNext"}, desc="B+=A, set flags" },
+	{ mnem="sbb a"      , opcode=0xBF,                                                            {"aluB",          "alurA","aluAdd","aluRInv","aluCinOn","aluSaveCarry","aluSaveNZ","instrNext"}, desc="B-=A, set flags" },
+	{ mnem="adc a"      , opcode=0x4E,                                                            {"aluC",          "alurA","aluAdd",                     "aluSaveCarry","aluSaveNZ","instrNext"}, desc="C+=A, set flags" },
+	{ mnem="sbc a"      , opcode=0x4F,                                                            {"aluC",          "alurA","aluAdd","aluRInv","aluCinOn","aluSaveCarry","aluSaveNZ","instrNext"}, desc="C-=A, set flags" },
 	
 	{ category = "Jumps", catlet="J" },
 	{ mnem="jmp imm16"  , opcode=0x60, {"loadImm161","instrSub1"}, {"loadImm162","instrSub2"}, {"jmpAbsUT"              }, desc="I=imm16"      },