I have a couple of SMBs/DH MHROMS with chips and im looking to mod the CHR for 64k. Im trying to figure out where to wire the CHR A15 to the 74C161. Im trying to look at the pinout and it looks something like this:
MHROM '161:
1 5v
2 prg /ce (r)
3 prg d0
4 prg d1
5 prg d4
6 5v
7 gnd
8 gnd
9 prg r/w (n)
10 gnd
11 nc?
12 prg a15
13 chr a14
14 chr a13
15 nc?
16 5v
Im thinking pin 11 but not sure. Anyone have any info on this?
MHROM '161:
1 5v
2 prg /ce (r)
3 prg d0
4 prg d1
5 prg d4
6 5v
7 gnd
8 gnd
9 prg r/w (n)
10 gnd
11 nc?
12 prg a15
13 chr a14
14 chr a13
15 nc?
16 5v
Im thinking pin 11 but not sure. Anyone have any info on this?