MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
 Password:
Save Password
Forgot your Password?

 All Forums
 MCUmall Forums
 Open Source Project Willem Programmer Hardware
 Verify on the Dual Power Programmer

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize:
UserName:
Password:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List Spell Checker
   
Message:

* HTML is OFF
* Forum Code is ON
Smilies
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

   Insert an Image File
 Check here to include your profile signature.
    

T O P I C    R E V I E W
RKenney Posted - 10/23/2007 : 18:33:44
Hi' I'm fairly new at this - I am trying to read a 27c512 chip (EEprom from a VW - JL27C512E. It seems to read alright and fills the buffer, but when I then attempt to verify I get chip read differences at random locations. Succesive read / verify attempts give different compare error locations. Is there a problem with XP printer ports? Hardware check always indicates good! I did read on one of the forums that the red and green lights should go out when the software is loaded? Mine are on all the time.
2   L A T E S T    R E P L I E S    (Newest First)
DL Posted - 10/26/2007 : 12:18:08
quote:
Originally posted by RKenney

Is there a problem with XP printer ports? Hardware check always indicates good! I did read on one of the forums that the red and green lights should go out when the software is loaded? Mine are on all the time.
If VPP is enabled while reading the data, you could end up programming your EPROM (unintentionally).

When the program is running and in synch with the programmer, only the PWR LED should be on unless you're reading or writing. VPP should only be on when you're programming.

There's a registry edit that disables printer port polling in WinXP. It stopped working for me around SP2 and I had to disable legacy plug/play support on the printer port to stop polling. Polling will randomly enable VPP and VCC. I had dozens of devices programmed by accident before I found out about disabling plug/play support. It would be nice if all Willem type programmers had a VPP disable feature...

HTH,
Dennis
ZLM Posted - 10/24/2007 : 08:14:54
check pin contat and try using a external power.

MCUmall EPROM BIOS Chip Burner Forum © Copyright 2003 - 2009 Mcumall Electronics Inc. Go To Top Of Page
Generated in 0.08 sec. Snitz Forums 2000