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Delete SNESROM.PIN

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optixx 2016-05-15 13:13:52 +02:00
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Here's the pinout to a 4Mbit/*Mbit mask Rom used in SNES carts as I've
deduced from various specs and actual testing.
1 A17 ------\__/------ +5v 32
2 A18 | | *OE 31
3 A15 A19 30
4 A12 A14 29
5 A7 A13 28
6 A6 A8 27
7 A5 A9 26
8 A4 A11 25
9 A3 A16 24
10 A2 A10 23
11 A1 *CE 22
12 A0 D7 21
13 D0 D6 20
14 D1 D5 19
15 D2 D4 18
16 GND |---------------| D3 17
The design approximates std EPROM/SRAM pinouts except for the upper address
lines (A16-A19), and OE which sits where VPP or PRGM usually is for an EPROM.
This pinout approximates Fujitsu's tentative mask ROM pinouts (a package
called GAMEMEDC.ZIP seems to base itself on this and is consequently wrong).
Nintendo uses Fujitsu chips in some carts, but from my testing and card-edge
pinouts provided by other users, I conclude that Fujitsu must have modified
the designs.
NOTE!: Card-edge pin #40, address line 15 (A15) is not used by any cart I've
seen. And ROM pin #3 (see above) that I've determined to be A15 is connected
to card-edge pin#41, labeled on many pinouts schems as A16..not A15!!!
Would some one please verify this inconsistency.
PS: How many Megabits can the Snes address?