Are the 5864 RAMs swappable with the 62256? Also what is RAM7 & 8? More Video RAM?
MV1FZ COLOR RAM
RAM9
1 NC VCC
2 A12 U7 (12)
3 A7 GU3 (12)
4 A6 GU3 (11)
5 A5 GU3 (9)
6 A4 GU3 (8)
7 A3 GU3 (3)
8 A2 GU3 (2)
9 A1 GU3 (159)
10 A0 GU3 (158)
11 D0 U8 (2), U10 (3)
12 D1 U8 (3), U10 (4)
13 D2 U8 (4), U10 (7)
14 GND GND
15 D3 U8 (5), U10 (8)
16 D4 U8 (6), U10 (13)
17 D5 U8 (7), U10 (14)
18 D6 U8 (8), U10 (17)
19 D7 U8 (9), U10 (18)
20 CE1 GND
21 A10 GU3 (31)
22 OE GND
23 A11 GU3 (32)
24 A9 GU3 (29)
25 A8 GU3 (28)
26 CE2 VCC
27 WE U1 (11)
28 VCC VCC
RAM10
1 NC VCC
2 A12 U7 (12)
3 A7 GU3 (12)
4 A6 GU3 (11)
5 A5 GU3 (9)
6 A4 GU3 (8)
7 A3 GU3 (3)
8 A2 GU3 (2)
9 A1 GU3 (159)
10 A0 GU3 (158)
11 D0 U9 (2), U11 (3)
12 D1 U9 (3), U11 (4)
13 D2 U9 (4), U11 (7)
14 GND GND
15 D3 U9 (5), U11 (8)
16 D4 U9 (6), U11 (13)
17 D5 U9 (7), U11 (14)
18 D6 U9 (8), U11 (17)
19 D7 U9 (9), U11 (18)
20 CE1 GND
21 A10 GU3 (31)
22 OE GND
23 A11 GU3 (32)
24 A9 GU3 (29)
25 A8 GU3 (28)
26 CE2 VCC
27 WE U1 (11)
28 VCC VCC
First of all, double check the connections:
Code:MV1FZ COLOR RAM RAM9 1 NC VCC 2 A12 U7 (12) 3 A7 GU3 (12) 4 A6 GU3 (11) 5 A5 GU3 (9) 6 A4 GU3 (8) 7 A3 GU3 (3) 8 A2 GU3 (2) 9 A1 GU3 (159) 10 A0 GU3 (158) 11 D0 U8 (2), U10 (3) 12 D1 U8 (3), U10 (4) 13 D2 U8 (4), U10 (7) 14 GND GND 15 D3 U8 (5), U10 (8) 16 D4 U8 (6), U10 (13) 17 D5 U8 (7), U10 (14) 18 D6 U8 (8), U10 (17) 19 D7 U8 (9), U10 (18) 20 CE1 GND 21 A10 GU3 (31) 22 OE GND 23 A11 GU3 (32) 24 A9 GU3 (29) 25 A8 GU3 (28) 26 CE2 VCC 27 WE U1 (11) 28 VCC VCC RAM10 1 NC VCC 2 A12 U7 (12) 3 A7 GU3 (12) 4 A6 GU3 (11) 5 A5 GU3 (9) 6 A4 GU3 (8) 7 A3 GU3 (3) 8 A2 GU3 (2) 9 A1 GU3 (159) 10 A0 GU3 (158) 11 D0 U9 (2), U11 (3) 12 D1 U9 (3), U11 (4) 13 D2 U9 (4), U11 (7) 14 GND GND 15 D3 U9 (5), U11 (8) 16 D4 U9 (6), U11 (13) 17 D5 U9 (7), U11 (14) 18 D6 U9 (8), U11 (17) 19 D7 U9 (9), U11 (18) 20 CE1 GND 21 A10 GU3 (31) 22 OE GND 23 A11 GU3 (32) 24 A9 GU3 (29) 25 A8 GU3 (28) 26 CE2 VCC 27 WE U1 (11) 28 VCC VCC
As for replacements:
http://www2.mouser.com/ProductDetail/Alliance-Memory/AS6C6264A-70SCN/?qs=E5c5%2bmu3i384e45CukH3qg==
The only thing you could be unsure of is the pitch since original RAM is 450mil (11.43mm) while Mouser RAM is 330mil (8.38mm) and the datasheet doesn't have dimension drawings. The solder pad rows on the MVS board are about 9mm apart from each other but I think the 330mil in this case refers to the chip body, see for instance this RAM from a different manufacturer which has a perfect footprint for the MVS board. So I'm pretty positive the Mouser RAM will fit fine as well.
As for Digikey, they don't stock any drop-in replacements.
I got some KM6264BLG-7 that should fit and work fine.
MV1FZ Video RAM
RAM5 (lower)
1 A14 LSPC2 (40)
2 A12 LSPC2 (37)
3 A7 LSPC2 (31)
4 A6 LSPC2 (30)
5 A5 LSPC2 (29)
6 A4 LSPC2 (27)
7 A3 LSPC2 (26)
8 A2 LSPC2 (25)
9 A1 LSPC2 (24)
10 A0 LSPC2 (23)
11 D0 LSPC2 (41)
12 D1 LSPC2 (42)
13 D2 LSPC2 (43)
14 GND GND
15 D3 LSPC2 (44)
16 D4 LSPC2 (45)
17 D5 LSPC2 (46)
18 D6 LSPC2 (47)
19 D7 LSPC2 (48)
20 CE GND
21 A10 LSPC2 (35)
22 OE LSPC2 (59)
23 A11 LSPC2 (36)
24 A9 LSPC2 (34)
25 A8 LSPC2 (32)
26 A13 LSPC2 (38)
27 WE LSPC2 (60)
28 VCC VCC
RAM6 (higher)
1 A14 LSPC2 (40)
2 A12 LSPC2 (37)
3 A7 LSPC2 (31)
4 A6 LSPC2 (30)
5 A5 LSPC2 (29)
6 A4 LSPC2 (27)
7 A3 LSPC2 (26)
8 A2 LSPC2 (25)
9 A1 LSPC2 (24)
10 A0 LSPC2 (23)
11 D0 LSPC2 (49)
12 D1 LSPC2 (51)
13 D2 LSPC2 (52)
14 GND GND
15 D3 LSPC2 (53)
16 D4 LSPC2 (54)
17 D5 LSPC2 (55)
18 D6 LSPC2 (57)
19 D7 LSPC2 (58)
20 CE GND
21 A10 LSPC2 (35)
22 OE LSPC2 (59)
23 A11 LSPC2 (36)
24 A9 LSPC2 (34)
25 A8 LSPC2 (32)
26 A13 LSPC2 (38)
27 WE LSPC2 (60)
28 VCC VCC
First of all, double check the connections:
Code:MV1FZ COLOR RAM RAM9 1 NC VCC 2 A12 U7 (12) 3 A7 GU3 (12) 4 A6 GU3 (11) 5 A5 GU3 (9) 6 A4 GU3 (8) 7 A3 GU3 (3) 8 A2 GU3 (2) 9 A1 GU3 (159) 10 A0 GU3 (158) 11 D0 U8 (2), U10 (3) 12 D1 U8 (3), U10 (4) 13 D2 U8 (4), U10 (7) 14 GND GND 15 D3 U8 (5), U10 (8) 16 D4 U8 (6), U10 (13) 17 D5 U8 (7), U10 (14) 18 D6 U8 (8), U10 (17) 19 D7 U8 (9), U10 (18) 20 CE1 GND 21 A10 GU3 (31) 22 OE GND 23 A11 GU3 (32) 24 A9 GU3 (29) 25 A8 GU3 (28) 26 CE2 VCC 27 WE U1 (11) 28 VCC VCC RAM10 1 NC VCC 2 A12 U7 (12) 3 A7 GU3 (12) 4 A6 GU3 (11) 5 A5 GU3 (9) 6 A4 GU3 (8) 7 A3 GU3 (3) 8 A2 GU3 (2) 9 A1 GU3 (159) 10 A0 GU3 (158) 11 D0 U9 (2), U11 (3) 12 D1 U9 (3), U11 (4) 13 D2 U9 (4), U11 (7) 14 GND GND 15 D3 U9 (5), U11 (8) 16 D4 U9 (6), U11 (13) 17 D5 U9 (7), U11 (14) 18 D6 U9 (8), U11 (17) 19 D7 U9 (9), U11 (18) 20 CE1 GND 21 A10 GU3 (31) 22 OE GND 23 A11 GU3 (32) 24 A9 GU3 (29) 25 A8 GU3 (28) 26 CE2 VCC 27 WE U1 (11) 28 VCC VCC
As for replacements:
http://www2.mouser.com/ProductDetail/Alliance-Memory/AS6C6264A-70SCN/?qs=E5c5%2bmu3i384e45CukH3qg==
The only thing you could be unsure of is the pitch since original RAM is 450mil (11.43mm) while Mouser RAM is 330mil (8.38mm) and the datasheet doesn't have dimension drawings. The solder pad rows on the MVS board are about 9mm apart from each other but I think the 330mil in this case refers to the chip body, see for instance this RAM from a different manufacturer which has a perfect footprint for the MVS board. So I'm pretty positive the Mouser RAM will fit fine as well.
As for Digikey, they don't stock any drop-in replacements.
Then why are you not looking at my last post and quoting one from 7 years ago?