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babayaga
Norway
1 Posts |
 Posted - 12/12/2011 : 17:25:28
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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the board it self, though the boards that I've seen mentioned are very different from mine, cause it seems like i have a newer version of the board, here is a high resolution picture of my board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 ! =)
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| Reply #1
ZLM
2947 Posts |
Posted - 12/15/2011 : 10:43:08
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| Try any other EPROM. If it does not work too, then the programmer is defective. |
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| Reply #2
e5frog
Sweden
5 Posts |
Posted - 03/30/2012 : 14:21:45
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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...
Yours look a lot like the PCB5.0 but it has surface mounted logic circuits.
http://www.mcumall.com/support/StandardWillemUserGuide_files%5CPCB5.0JumpersLayout.jpg
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...
Found a perfect description here, should work on yours as well:
http://www.mcumall.com/forum/topic.asp?TOPIC_ID=227 |
Edited by - e5frog on 03/30/2012 16:19:47 |
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Willem pcb50 burning 27c801, new design, new JMP
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