Hello, I am trying to dump a pirate cartridge that came with a keyboard famiclone, containing some keyboard software and a couple of small games. But the only way I can do this is by reading the ROMs with my eprom reader. I can change the pinout at will (homemade adapter) but I must set a standard eprom type to read. This is the cartridge already with desoldered ROMs:
Notice that the PRG rom was on the left of the first image, and there was a wire connecting cartridge pin59 with CHR pin17 (CHR D5).
This is the pinout so far:
I tried to read these with standard pinout of the 27C128, 27C256 and 27C512 but the result is always a blank file (FF). So I think I got the pinout wrong and I have to find out the right pinout to read them correctly.
Is it possible that the roms on top of the globs are actually mappers or RAM chips and the globs themselves are the program ROMs?
This is the cart and a screen capture:
Notice that the PRG rom was on the left of the first image, and there was a wire connecting cartridge pin59 with CHR pin17 (CHR D5).
This is the pinout so far:
Code:
PRG
+5V 01 28 +5V
A12 02 27 R/W (pin14)
A7 03 26 VCC
A6 04 25 A8
A5 05 24 A9
A4 06 23 A11
A3 07 22 GND
A2 08 21 A10
A1 09 20 [glob]
A0 10 19 D7
D0 11 18 D6
D1 12 17 D5
D2 13 16 D4
GND 14 15 D3
CHR
+5V 01 28 +5V
[glob]02 27 /WR (pin47)
A7 03 26 +5V
A6 04 25 A8
A5 05 24 A9
A4 06 23 [glob]
A3 07 22 /RD (pin17)
A2 08 21 [glob]
A1 09 20 A13
A0 10 19 D7
D0 11 18 D6
D1 12 17 D5
D2 13 16 D4
GND 14 15 D3
+5V 01 28 +5V
A12 02 27 R/W (pin14)
A7 03 26 VCC
A6 04 25 A8
A5 05 24 A9
A4 06 23 A11
A3 07 22 GND
A2 08 21 A10
A1 09 20 [glob]
A0 10 19 D7
D0 11 18 D6
D1 12 17 D5
D2 13 16 D4
GND 14 15 D3
CHR
+5V 01 28 +5V
[glob]02 27 /WR (pin47)
A7 03 26 +5V
A6 04 25 A8
A5 05 24 A9
A4 06 23 [glob]
A3 07 22 /RD (pin17)
A2 08 21 [glob]
A1 09 20 A13
A0 10 19 D7
D0 11 18 D6
D1 12 17 D5
D2 13 16 D4
GND 14 15 D3
I tried to read these with standard pinout of the 27C128, 27C256 and 27C512 but the result is always a blank file (FF). So I think I got the pinout wrong and I have to find out the right pinout to read them correctly.
Is it possible that the roms on top of the globs are actually mappers or RAM chips and the globs themselves are the program ROMs?
This is the cart and a screen capture: