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-rw-r--r--src/mess/machine/victor9kb.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/src/mess/machine/victor9kb.c b/src/mess/machine/victor9kb.c
index dbffa47fa88..568eb4f8667 100644
--- a/src/mess/machine/victor9kb.c
+++ b/src/mess/machine/victor9kb.c
@@ -294,7 +294,27 @@ Key Layout (USA Variant): (the S0x markings appear on the back of the PCB)
Note that the five unused key contacts:
S09, S47, S67, S77 and S104
may be used on international variants of the Victor 9000/Sirius 1 Keyboard.
-
+
+Keyboard Matrix
+---------------
+Row select
+| Columns
+| 0 1 2 3 4 5 6 7
+V V V V V V V V V
+Y0 12 13 33 34 54 55 75 76
+Y1 14 15 35 36 56 57 77 78
+Y2 16 17 37 38 58 59 79 80
+Y3 18 19 39 40 60 61 81 82
+Y4 20 21 41 42 62 63 83 84
+Y5 22 23 43 44 64 65 85 86
+Y6 24 25 45 46 66 67 87 88
+Y7 26 27 47 48 68 69 89 90
+Y8 28 29 49 50 70 71 91 92
+Y9 30 31 51 52 72 73 93 94
+Y10 32 11 53 10 74 09 07 06
+Y11 104 103 102 101 100 99 98 97
+/3Y 05 04 03 02 01 08 95 96
+
*/
#include "victor9kb.h"