Toss your Willem eprommers :)

[Jope]

Originally Posted by roy bates

just out of curiosity,what are these reliability problems?

Reliability problems as in take a 27c256 EPROM, try to burn it in Willem, it will sometimes fail to verify no matter what speed you select in the tool.

Then take a real programmer, such as the Wellon or as I have, a SpeedMaster LV48, insert the exact same EPROM that the Willem was unable to write to, and it is burned correctly on the first try.

That is reliability.

and working fine if you dont need to program multiple eproms?

The old parallel port willem requires you to unplug the power supply and adjust the dip switches every time you change to a different type of memory chip.

[roy bates]

ive had no such reliability problems.(but a have been sent bad parts,which was partly my own fault as i knew they where untested)

i dont mind flicking a few switches and adjusting a few jumpers.(i knew it had them before i bought it)

the problem i have with them,is when you buy one i never was sent a manual for all the jumper settings.


ok,there are better programmers,but even they have problems.

[Arnie]

Originally Posted by roy bates

did you have the jumpers set correctly for vpp? it wont write if that jumper is set wrong and its a good idea to use an external power supply.(there are also jumpers to set vpp voltage.)

I tried every vpp setting, jumper combination, A17-19 wires attached/detached but, the damn thing never worked properly.

I guess I just haven't got the patience for Willems.

EDIT: Anyone want a slightly used Willem, great at reading eproms.

[roy bates]

Originally Posted by Arnie

I tried every vpp setting, jumper combination, A17-19 wires attached/detached but, the damn thing never worked properly.

I guess I just haven't got the patience for Willems.

EDIT: Anyone want a slightly used Willem, great at reading eproms.

why dont you just put it in the for sale section,if you really dont want it.

im not for or against willems,everyone has fallen foul of some form of hardware or other.

mine was an osciloscope that wasent callibrated properly,but i wont get into that here.