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-rw-r--r--src/emu/machine/pla.h18
1 files changed, 17 insertions, 1 deletions
diff --git a/src/emu/machine/pla.h b/src/emu/machine/pla.h
index 970c2f97ddc..d68306e2b53 100644
--- a/src/emu/machine/pla.h
+++ b/src/emu/machine/pla.h
@@ -54,7 +54,23 @@ enum
// macros for known (and used) devices
// 82S100, 82S101, PLS100, PLS101
-// 16x48x8 PLA, 28-pin
+// 16x48x8 PLA, 28-pin:
+/* _____ _____
+ FE 1 |* \_/ | 28 Vcc
+ I7 2 | | 27 I8
+ I6 3 | | 26 I9
+ I5 4 | | 25 I10
+ I4 5 | | 24 I11
+ I3 6 | 82S100 | 23 I12
+ I2 7 | 82S101 | 22 I13
+ I1 8 | PLS100 | 21 I14
+ I0 9 | PLS101 | 20 I15
+ F7 10 | | 19 _CE
+ F6 11 | | 18 F0
+ F5 12 | | 17 F1
+ F4 13 | | 16 F2
+ GND 14 |_____________| 15 F3
+*/
#define MCFG_PLS100_ADD(_tag) \
MCFG_PLA_ADD(_tag, 16, 8, 48)