MCUmall EPROM BIOS Chip Burner Forum
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 Using The Enhanced/Dual power Willem Programmer
 Problem with enhanced willem and 27cxxx
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goukizero

Spain
1 Posts

Posted - 12/10/2009 :  17:06:00  Show Profile  Reply with Quote
Hello

I just bought an enhanced willem with the 16bit 40-42 dip adapter, it has not extra power supply plug, it just has USB and Parallel port input.

I can read all (27c1024, 27c160, 27c800, 27c000) eproms ok, but i can't write any of them. I ever have the same error : 0x000000 chip = 0xff or 0x00 and buffer 0x00 or 0xff It depends about the bin file i want to use.

Well, I used all the combinations i could do with the wires, the programmer, the adapter. I ever get an error.

I can read all of them, so I suppose the Willem works...

I'm really desperated.

If you can help me, please !!!
Reply #1

ZLM

2926 Posts

Posted - 12/15/2009 :  09:42:55  Show Profile  Reply with Quote
Use a 9v or 12v external power adapter to see if it works.
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Reply #2

simeon

United Kingdom
79 Posts

Posted - 01/23/2010 :  07:05:50  Show Profile  Reply with Quote
you can still use it by adding a small jumper between the vcc pin 32 and 28 on there tracks
when you want to program you can add 6.250 here from a small supply of 9vdc and using a three pin voltage regulator 5.1v and add some diodes to its ground pin to raise its voltage output to 6.2 {ie two diodes for 1.2v}{this is aok for reading also}


machine toshiba equium laptop usb only type
p5b asus main machine
thinking of adding dual lpt pci card
both used for top and lpt via usb where i can

old p2 programming grumbling tank with xp sp3 for true serial and lpt

all machines bios set to enable bios plug and play aware o/s and lpt spollers services and drivers removed
legacy detection enabled
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