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-rw-r--r--src/mess/machine/victor9kb.c46
1 files changed, 24 insertions, 22 deletions
diff --git a/src/mess/machine/victor9kb.c b/src/mess/machine/victor9kb.c
index c4efbb1bfee..a2b43fa77b6 100644
--- a/src/mess/machine/victor9kb.c
+++ b/src/mess/machine/victor9kb.c
@@ -11,33 +11,35 @@
/*
-PCB Layout
+Keyboard PCB Layout
----------
-A65-02307-201D
-
-|-----------------------------------------------------------------------|
-| 22-008-03 22-050-3B 8021 74LS14 CN1|
-| ?MHz |
-| |
-| |
-| |
-| |
-| |
-| |
-| |
-| |
-| |
-|-----------------------------------------------------------------------|
+Marking on PCB back: A65-02307-201D 007
+
+|------------------------------------------------------------------------------------=
+| 22-908-03 22-950-3B . XTAL 8021 74LS14 [804x] [EPROM] [???] CN1=___
+| X X X X X X X X X X X |
+| X X X X X X X X X X X X X X X X X X X X X |
+| X X X X X X X X X X X X X X X X X X X X X |
+| X X X X X X X X X X X X X X X X X X X X X |
+| X X X X X X X X X X X X X X X X X X X X |
+| X X marking X X X X X X X X |
+|----------------------------------------------------------------------------------------|
+
Notes:
All IC's shown.
-
- 8021 - Intel 8021 "70-8021-130?"
- 22-008-03 - Exar Semiconductor XR22-008-03 keyboard matrix capacitive readout latch
- 22-050-3B - Exar Semiconductor XR22-050-3B keyboard matrix row driver with 4 to 12 decoder/demultiplexer
- CN1 - keyboard data connector
-
+ XTAL - 3.579545Mhz Crystal, marked "48-300-010" (front) and "3.579545Mhz" (back)
+ 8021 - Intel 8021 MCU, marked: "iP8021 2137 // 8227 // 20-8021-139 // (C) INTEL 77"
+ 22-908-03 - Exar Semiconductor XR22-008-03 keyboard matrix capacitive readout latch
+ 22-950-3B - Exar Semiconductor XR22-050-3B keyboard matrix row driver with 4 to 12 decoder/demultiplexer
+ CN1 - keyboard data connector (SIP, 7 pins, right angle)
+
+ [804x] - unpopulated space for a 40 pin 804x or 803x MCU
+ [EPROM] - unpopulated space for an EPROM, if a ROMless 803x MCU was used
+ [???] - unpopulated space for an unknown NDIP10 IC or DIP-switch array
+ X - capacitive sensor pad for one key
+ marking - PCB trace marking: "KTC // A65-02307-007 // PCB 201 D"
*/
#include "victor9kb.h"