Canon V-30F MSX2

Vram socket pinout does not currently have +5v line connected, because FB107 actual component is missing. So is this some kind of proto version or what, as the vram module would not work without soldering that fuse.

Read what popolon has written just above.

The absence of serial number is another indice.

VRAM socket (seen at the back of the computer) pinout (2x12 pins, female connector):
12 11 10 09 08 07 06 05 04 03 02 01
--------------------------------------
| # # # # # # # # # # # # | B-row (would be edge connector pins in component side of VRAM expansion pcb)
- ---------------------------------- -
| # # # # # # # # # # # # | A-row (would be edge connector pins in solder side of VRAM expansion pcb)
--------------------------------------
A1 _WE
A2 _RAS
A3 A0
A4 A3
A5 A1
A6 A4
A7 1st Dram I/O4
A8 1st Dram I/O2
A9 2nd Dram-I/O4
A10 2nd Dram-I/O2
A11 5V
A12 GND

B1 N.C.
B2 _CAS1
B3 A7
B4 A2
B5 A5
B6 A6
B7 1st Dram I/O3
B8 1st Dram I/O1
B9 2nd Dram-I/O3
B10 2nd Dram-I/O1
B11 5V
B12 GND

Keyboard connector ( seen at the back of computer) pinout ( 2x10 pins, male connector):
---------------------------------
| 19 17 15 13 11 09 07 05 03 01 |
| 20 18 16 14 12 10 08 06 04 02 |
---------------------------------
1 X2
2 X1
3 X0
4 X3
5 X6
6 X5
7 X3
8 X7
9 Yd
10 Yc
11 Yb
12 Ya
13 +5V
14 GND
15 KANA LED (goes to S3527 via 220ohm resistor)
16 CAPS LED (goes to S3527 via 220ohm resistor)
17 GND
18 GND
19 N.C.
20 N.C.
Note! Pins 9-12 order may not be correct. These pins come from toshiba gate array chip (TC17G005AP-0007), not from S3527 y-pins)

A powerline filter blok is a wire with ceramic on it for filtering small spikes or interference. Correct about Vram cartridge it can be removed. BTW it has an 64 kb memory mapper also changed . I like to correct things even if someone else handles other priorities in how it should be done.

Question: If i remove serial number it will be a prototype ?