just a quick question to anyone in the know before I try and diagnose the issue myself.
I built a 42pin dip adapter as per the schematics here
The schematics appear to show that the 16mb / 32mbit switch is wired to change
Pin 32 <VPP / A20>
Pin 13 <OE / VPP>
I built this and verified it is wired correctly but it doesn't seem to work right.. if I put the switch into 16mbit mode it will detect the 322 eprom and then i can switch it to 32mb to program it else it will not program (lack of VPP)..
If I leave it in 32mbit mode then the chip isn't detected at all.
starting the chip off in the 16mbit mode then swapping to 32mbit I can program the whole 32mbit correctly and verify it.
Is this how the stock adapter works too or is the schematic incorrect / i'm doing something different.
Thanks in advance if anyone knows.
I built a 42pin dip adapter as per the schematics here
The schematics appear to show that the 16mb / 32mbit switch is wired to change
Pin 32 <VPP / A20>
Pin 13 <OE / VPP>
I built this and verified it is wired correctly but it doesn't seem to work right.. if I put the switch into 16mbit mode it will detect the 322 eprom and then i can switch it to 32mb to program it else it will not program (lack of VPP)..
If I leave it in 32mbit mode then the chip isn't detected at all.
starting the chip off in the 16mbit mode then swapping to 32mbit I can program the whole 32mbit correctly and verify it.
Is this how the stock adapter works too or is the schematic incorrect / i'm doing something different.
Thanks in advance if anyone knows.