File offset problem

[VX L67 Getrag]

I'm trying to write blcd ose to a 512k chip & have tried giving it a file offset of 008000 & it failed so then I gave it a device offset of 008000 & left the file as 000000 & it failed again!

I've tried it 12 times & at all 5 different speeds but each time it gets to 50% so right at the offset I want & says; write failed, address=0x008000, buffer=0x00, device=0xFF

I've blank checked it 5 times & says it's blank any ideas?

[The1]

i just stack bins in tunerpro then just burn as per normal, easier than working out offsets which i found confusing in the burner program

[darcy]

0x08000 should be the correct offset for a 32kbyte Bin on a 512kbyte chip (64kb)

[Holden202T]

i had the same issue with my new willem, i tried offsetting the file and that failed, but then offsetting in the program seemed to work fine!

[VX L67 Getrag]

Ok it must be the user fault yet again!

I tried stacking it & it still would fail but now at 0% so I thought maybe wrong chip so I've tried nmc27c512, nmc27c256 & nmc27c128b but all failing at 0 or 1% is there any way of identifying the eproms?

[The1]

if your using a willem gq4x it has id function. Is your chips erased properly?

[VX L67 Getrag]

Thanks guys but just figured out I'm even stupider than I first thought! It's a memcal out of an 808 so 128 k eprom & trying to write a 32k ose file to it so it obviously won't fit!

On a similar note are the vn/vp/vr eprom's still nm27c128 & nm27c256 or just generic 27c128 & 27c256?

[yoda69]

I normally set to generic then use the Willem to ID it as there are a couple of different ones used.