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author ClawGrip <clawgrip@hotmail.com>2020-08-24 00:57:20 +0200
committer GitHub <noreply@github.com>2020-08-23 18:57:20 -0400
commit73759930bf08c063c57d611b65999a245355bfbe (patch)
treee56d350bc9b1a0a9083c4f573a246f5fbdc99951
parent56c8fbae2fb3839fe7ba1773888868b68b21ea75 (diff)
sega_beena.cpp: Add note about cartridges pinout (#7130)
-rw-r--r--src/mame/drivers/sega_beena.cpp62
1 files changed, 60 insertions, 2 deletions
diff --git a/src/mame/drivers/sega_beena.cpp b/src/mame/drivers/sega_beena.cpp
index 0d99df52952..5c16d123a24 100644
--- a/src/mame/drivers/sega_beena.cpp
+++ b/src/mame/drivers/sega_beena.cpp
@@ -15,9 +15,67 @@
Needs the internal BIOS dumped.
Component list / PCB diagram
- cartridge ROM has 'edinburgh' in the header, maybe a system codename?
+ Cartridge ROM has 'edinburgh' in the header, maybe a system codename?
ROM is also full of OGG files containing the string 'Encoded with Speex speex-1.0.4'
- as well as .mid files for music
+ as well as .mid files for music.
+
+ Cartridges pinout:
+
+ Glob down, PCB cut corner at upper right
+ Top row of pins A25 on left to A1 on right.
+ Bottom row of pins B25 on left to B1 on right.
+
+ A1 /CE (tied high with resistor)
+ A2 D11
+ A3 D3
+ A4 D10
+ A5 D2
+ A6 D9
+ A7 D1
+ A8 D8
+ A9 D0
+ A10 /OE
+ A11 N/C
+ A12 A0
+ A13 A1
+ A14 A2
+ A15 A3
+ A16 A4
+ A17 A5
+ A18 A6
+ A19 A7
+ A20 A17
+ A21 A18
+ A22 N/C
+ A23 VCC
+ A24 N/C
+ A25 GND
+
+ B1 N/C
+ B2 D4
+ B3 D12
+ B4 D5
+ B5 D13
+ B6 D6
+ B7 D14
+ B8 D7
+ B9 D15
+ B10 A16
+ B11 A15
+ B12 A14
+ B13 A13
+ B14 A12
+ B15 A11
+ B16 A10
+ B17 A9
+ B18 A8
+ B19 A19
+ B20 A20
+ B21 N/C
+ B22 A21
+ B23 VCC
+ B24 N/C
+ B25 GND
*******************************************************************************/