diff --git a/Floppies/A2OSX.BUILD.po b/Floppies/A2OSX.BUILD.po
index fb370ff9..8e6f063c 100644
Binary files a/Floppies/A2OSX.BUILD.po and b/Floppies/A2OSX.BUILD.po differ
diff --git a/Floppies/A2OSX.SRC.po b/Floppies/A2OSX.SRC.po
index e55696e8..78981bc2 100644
Binary files a/Floppies/A2OSX.SRC.po and b/Floppies/A2OSX.SRC.po differ
diff --git a/INC/LIBTCPIP.I.txt b/INC/LIBTCPIP.I.txt
index cecf2501..f08e3529 100644
--- a/INC/LIBTCPIP.I.txt
+++ b/INC/LIBTCPIP.I.txt
@@ -184,7 +184,7 @@ S.TCB.OUTUSED		.EQ 18
 *
 S.TCB.SEQNUM		.EQ 20				Send:SEQ not yet ACKed
 S.TCB.ACKNUM		.EQ 24				Rcvd:Last ACK recieved from remote
-S.TCB.LASTSEQ		.EQ 28				Rcvd:Last SEQ accepted data from remote
+S.TCB.NEXTSEQ		.EQ 28				Rcvd:Next SEQ accepted data from remote
 *
 S.TCB				.EQ 32
 *--------------------------------------
diff --git a/LIB/LIBTCPIP.S.SKT.txt b/LIB/LIBTCPIP.S.SKT.txt
index c3310830..90144fcc 100644
--- a/LIB/LIBTCPIP.S.SKT.txt
+++ b/LIB/LIBTCPIP.S.SKT.txt
@@ -634,7 +634,7 @@ SKT.AddDataToSktIn
 				ldx #3
 
 .10				lda (ZPFrameInPtr),y
-				eor SKT.TCBCache+S.TCB.LASTSEQ,x
+				eor SKT.TCBCache+S.TCB.NEXTSEQ,x
 				bne .9
 				dey
 				dex
@@ -719,17 +719,17 @@ SKT.AddDataToSktIn
 			
 				clc
 				
-				lda SKT.TCBCache+S.TCB.LASTSEQ+3
+				lda SKT.TCBCache+S.TCB.NEXTSEQ+3
 				adc ZPDataInLen
-				sta SKT.TCBCache+S.TCB.LASTSEQ+3
+				sta SKT.TCBCache+S.TCB.NEXTSEQ+3
 				
-				lda SKT.TCBCache+S.TCB.LASTSEQ+2
+				lda SKT.TCBCache+S.TCB.NEXTSEQ+2
 				adc ZPDataInLen+1
-				sta SKT.TCBCache+S.TCB.LASTSEQ+2
+				sta SKT.TCBCache+S.TCB.NEXTSEQ+2
 				bcc .80
-				inc SKT.TCBCache+S.TCB.LASTSEQ+1
+				inc SKT.TCBCache+S.TCB.NEXTSEQ+1
 				bne .80
-				inc SKT.TCBCache+S.TCB.LASTSEQ
+				inc SKT.TCBCache+S.TCB.NEXTSEQ
 
 .80				jmp SKT.StoreTCB
 *--------------------------------------
@@ -747,7 +747,7 @@ SKT.GetDataFromSktIn
 				ora SKT.TCBCache+S.TCB.INUSED+1
 				bne .10
 				sec
-				rts						NO DATA
+				rts						A=0,NO DATA
 
 .10				ldy #S.SOCKET.SQ.hInMem
 				lda (ZPPtrSKT),y
@@ -985,7 +985,7 @@ SKT.AddDataToSktOut
 				adc ZPDataInLen+1
 				sta SKT.TCBCache+S.TCB.TOSEND+1
 				jsr SKT.StoreTCB
-				jmp TCP.OUT.I
+				rts
 *--------------------------------------
 * From TCP.OUT
 * Src : hOutMem/OUTTAIL
diff --git a/LIB/LIBTCPIP.S.TCP.txt b/LIB/LIBTCPIP.S.TCP.txt
index 3497e6c4..aa2f6cd5 100644
--- a/LIB/LIBTCPIP.S.TCP.txt
+++ b/LIB/LIBTCPIP.S.TCP.txt
@@ -124,7 +124,7 @@ TCP.IN.JMP.LISTEN
 .3				lda (ZPFrameInPtr),y	Set ACK=SEQ+1 for new socket...
 				adc #0
 				sta SKT.TCBCache+S.TCB.ACKNUM,x
-				sta SKT.TCBCache+S.TCB.LASTSEQ,x
+				sta SKT.TCBCache+S.TCB.NEXTSEQ,x
 				dey
 				dex
 				bpl .3
@@ -448,7 +448,7 @@ TCP.OUT.SendOpt	sta .1+1
 TCP.OUT.Send	ldy #S.TCP.OPTIONS
 				sta (ZPFrameOutPtr),y
 				bit #S.TCP.OPTIONS.ACK
-				beq .1
+				beq .11
 				
 				ldx #3
 				ldy #S.TCP.ACK.NUMBER+3
@@ -458,6 +458,15 @@ TCP.OUT.Send	ldy #S.TCP.OPTIONS
 				dey
 				dex
 				bpl .10
+				bra .1
+				
+.11				ldy #S.TCP.ACK.NUMBER
+				lda #0
+				
+.12				sta (ZPFrameOutPtr),y
+				iny
+				cpy #S.TCP.ACK.NUMBER+4
+				bne .12
 				
 .1				ldx #3
 				ldy #S.TCP.SEQ.NUMBER+3