diff --git a/65xx.dcm b/65xx.dcm
index 971bbb1..e52b145 100644
--- a/65xx.dcm
+++ b/65xx.dcm
@@ -96,6 +96,18 @@ K 6502 6515 CPU uP
 F http://www.6502.org/documents/datasheets/mos/mos_6500_mpu_mar_1980.pdf
 $ENDCMP
 #
+$CMP 6520
+D 6520 NMOS Peripheral Interface Adapter (PIA), 20-pin I/O, DIP-40
+K 6502 6520 PIA I/O
+F http://www.6502.org/documents/datasheets/mos/mos_6520.pdf
+$ENDCMP
+#
+$CMP 65CE02
+D 6502 8-bit CMOS Microprocessor, 64K, DIP-40
+K 6502 65CE02 CPU uP
+F http://www.6502.org/documents/datasheets/mos/mos_65ce02_mpu.pdf
+$ENDCMP
+#
 $CMP 8500
 D 8500 8-bit HMOS Microprocessor, 64K, 6-bit I/O Port, DIP-40
 K 6502 8500 CPU uP
@@ -124,6 +136,18 @@ K 6502 CPU uP
 F http://www.westerndesigncenter.com/wdc/documentation/w65c02s.pdf
 $ENDCMP
 #
+$CMP W65C21NxP
+D W65C21N CMOS Peripheral Interface Adapter (PIA), 20-pin I/O, NMOS-Compatible, DIP-40
+K 6502 6521 PIA I/O
+F http://www.westerndesigncenter.com/wdc/documentation/w65c21.pdf
+$ENDCMP
+#
+$CMP W65C21SxP
+D W65C21S CMOS Peripheral Interface Adapter (PIA), 20-pin I/O, DIP-40
+K 6502 6521 PIA I/O
+F http://www.westerndesigncenter.com/wdc/documentation/w65c21.pdf
+$ENDCMP
+#
 $CMP W65C816SxP
 D W65C816S 8/16-bit CMOS General Purpose Microprocessor, DIP-40
 K 6502 65816 CPU uP
diff --git a/65xx.lib b/65xx.lib
index df1964c..6f19c76 100644
--- a/65xx.lib
+++ b/65xx.lib
@@ -8,6 +8,7 @@ F0 "U" -400 1400 50 H V L CNN
 F1 "6502" 0 0 50 V V C CNN
 F2 "" 0 2000 50 H I C CNN
 F3 "" 0 1900 50 H I C CNN
+ALIAS 65CE02
 $FPLIST
  DIP-40_W15.24mm*
 $ENDFPLIST
@@ -677,6 +678,62 @@ X A3 9 600 900 200 L 50 50 1 1 O
 ENDDRAW
 ENDDEF
 #
+# 6520
+#
+DEF 6520 U 0 40 Y Y 1 F N
+F0 "U" -400 1300 50 H V L CNN
+F1 "6520" 0 0 50 V V C CNN
+F2 "" 0 150 50 H I C CNN
+F3 "" 0 150 50 H I C CNN
+ALIAS W65C21NxP W65C21SxP
+$FPLIST
+ DIP-40_W15.24mm*
+$ENDFPLIST
+DRAW
+S -400 1250 400 -1250 0 1 0 f
+X VSS 1 0 -1450 200 U 50 50 1 1 W
+X PB0 10 600 -100 200 L 50 50 1 1 B
+X PB1 11 600 -200 200 L 50 50 1 1 B
+X PB2 12 600 -300 200 L 50 50 1 1 B
+X PB3 13 600 -400 200 L 50 50 1 1 B
+X PB4 14 600 -500 200 L 50 50 1 1 B
+X PB5 15 600 -600 200 L 50 50 1 1 B
+X PB6 16 600 -700 200 L 50 50 1 1 B
+X PB7 17 600 -800 200 L 50 50 1 1 B
+X CB1 18 600 -1000 200 L 50 50 1 1 I
+X CB2 19 600 -1100 200 L 50 50 1 1 B
+X PA0 2 600 1100 200 L 50 50 1 1 B
+X VCC 20 0 1450 200 D 50 50 1 1 W
+X CS0 22 -600 500 200 R 50 50 1 1 I
+X ~CS2 23 -600 300 200 R 50 50 1 1 I L
+X CS1 24 -600 400 200 R 50 50 1 1 I
+X ϕ2 25 -600 1000 200 R 50 50 1 1 I C
+X D7 26 -600 -1100 200 R 50 50 1 1 B
+X D6 27 -600 -1000 200 R 50 50 1 1 B
+X D5 28 -600 -900 200 R 50 50 1 1 B
+X D4 29 -600 -800 200 R 50 50 1 1 B
+X PA1 3 600 1000 200 L 50 50 1 1 B
+X D3 30 -600 -700 200 R 50 50 1 1 B
+X D2 31 -600 -600 200 R 50 50 1 1 B
+X D1 32 -600 -500 200 R 50 50 1 1 B
+X D0 33 -600 -400 200 R 50 50 1 1 B
+X ~RES 34 -600 1100 200 R 50 50 1 1 I L
+X RS1 35 -600 0 200 R 50 50 1 1 I
+X RS0 36 -600 100 200 R 50 50 1 1 I
+X ~IRQB 37 -600 800 200 R 50 50 1 1 C V
+X ~IRQA 38 -600 700 200 R 50 50 1 1 C V
+X CA2 39 600 100 200 L 50 50 1 1 B
+X PA2 4 600 900 200 L 50 50 1 1 B
+X CA1 40 600 200 200 L 50 50 1 1 I
+X PA3 5 600 800 200 L 50 50 1 1 B
+X PA4 6 600 700 200 L 50 50 1 1 B
+X PA5 7 600 600 200 L 50 50 1 1 B
+X PA6 8 600 500 200 L 50 50 1 1 B
+X PA7 9 600 400 200 L 50 50 1 1 B
+X 21 R/~W -600 -200 200 R 50 50 1 1 I
+ENDDRAW
+ENDDEF
+#
 # 8502
 #
 DEF 8502 U 0 40 Y Y 1 F N