was working on making an slrom eprom cart and had a quick question
The info for making one explains:
SLROM (mapper 1):
PRG socket:
Bend up pins 1, 2, 24, 30 and 31 (or cut tracks)
Solder pin 2 to hole 24 (A16)
Solder pin 24 to GND (OE)
Solder pin 30 to hole 1 (A17)
CHR socket:
Bend up pins 1, 2, 22, 24, 30 and 31 (or cut tracks)
Solder pin 2 to hole 24 (A16)
Solder pin 22 to hole 31 (CE or CHR /A13)
Solder pin 24 to hole 2 (OE or CHR /RD)
these are for a 27CXXX series, when I compare the datasheet for one I notice that 27CXXX chip has 5V for pin 1
Why is pin 1 left floating? shouldn't it be tied down to 5V?
thanks
The info for making one explains:
SLROM (mapper 1):
PRG socket:
Bend up pins 1, 2, 24, 30 and 31 (or cut tracks)
Solder pin 2 to hole 24 (A16)
Solder pin 24 to GND (OE)
Solder pin 30 to hole 1 (A17)
CHR socket:
Bend up pins 1, 2, 22, 24, 30 and 31 (or cut tracks)
Solder pin 2 to hole 24 (A16)
Solder pin 22 to hole 31 (CE or CHR /A13)
Solder pin 24 to hole 2 (OE or CHR /RD)
these are for a 27CXXX series, when I compare the datasheet for one I notice that 27CXXX chip has 5V for pin 1
Why is pin 1 left floating? shouldn't it be tied down to 5V?
thanks