V1 - rectangular cart
glob up, pins toward you, pins 1-10, left to right

1  tied high
2  CE1 left glob
3  CE2 right glob
4  pin 5
5  pin 4
6  data
7  ground
8  clock
9  3.3 volts
10 tied high


V2 - rounded top cart

1  CE1 left glob
2  CE2 right glob
3  tied high
4  ground
5  clock
6  data
7  ground
8  ground
9  3.3 volts
10 tied high


V2 PCB silkscreened with GPR23L822A - 8Mbit serial ROM
Some carts have 1 glob, some have 2.
Some globs dump 16Mbit, so probably GPR23L1622A.


To dump:
set data and clock high, CE1 low for 1 mS
set CE1 high for 3 uS
set data low for 2 uS
set clock low for 2 uS
set data high for 2 uS
set clock high for 2 uS
set clock low for 2 uS
set data low for 2 uS
loop 24 times:
  set clock high for 1 uS
  set clock low for 1 uS
make data high Z
loop 8M tims:
  set clock high for 1 uS
  sample data
  set clock low for 1 uS
set CE1 low

if 2 globs, repeat with CE2