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T O P I C R E V I E W
babayaga
Posted - 12/12/2011 : 17:25:28 Hi!
I' ve been reading around, because i never get my williem to burn these chips (27C801 to be exact), get a offset error after burning "error at 0x0000000 chip = 0xff buffer = 0x78" , I hear i need to adjust some jumpers on the board it self, though the boards that I've seen mentioned are very different from mine, cause it seems like i have a newer version of the board, here is a high resolution picture of my board
even when i was burning blank chips, i got error messages always after 99% of burnnig.
you can download a highres of the board from here
www . dobrajazz . com / wpcb50.jpg
any help appreciated ! =)
2 L A T E S T R E P L I E S (Newest First)
e5frog
Posted - 03/30/2012 : 14:21:45 The 27C801 has an A19 address pin, it looks like you need to put a jumper on the J12 strip, between P1 and A19 (I guess it sets pin one to A19).
Haven't tried myself yet but I have a pair of OTP 27C801 that I'd like to succeed programming on the first attempt...
Doesn't the program say anything about the J12 jumper when you select 27C801?
From what I understand the P1 to A19 connection is made instead of the jumper to the left of the dip switch. It says 27C080 8Mbit - and the 27C801 is also an 8 Mbit chip...