First you need to find the right setting for your chip. The Willem software will do that for you. So open up EPROMS45 program and click on the "Device select" button then select 27C128.
[[Image:Eprom01.JPGjpg|400px]]
== Then you will get the correct setup for your chip ==
With a little luck the rest of the setting on the board wont need to be change as the "factory settings" works quite well most 27128/27C128. But just in case here is a step by step check:
[[ImageBut just in case here is a step by step check:Board.JPG|400]]
Step 1[[Image: change the correct chip pattern to tell the board that we are using a 27C128 chipBoard.jpg|600px]]
=== Step 2: check correct Vpp (programming voltage). Note how it usually says on the chip what the Vpp is (see RED circle). 27C128 usually use 12,5V and this is usually the default of the board. Note that you MAY get some chips that require the higher 21V. If you get a chip without visible Vpp try the lower 12,5V first. So far all the chips ive used worked with 12,5V.1 ===
Step 3: Ensure that all these pins are in normal change the correct chip usage position (normal usage for this chip of cause). This is pattern to tell the default posistions, so with board that we are using a little luck you wont have to touch them at all27C128 chip.
=== Step 4: Select software version to fit board 2 === check correct Vpp (defaultprogramming voltage). Note how it usually says on the chip what the Vpp is (see RED circle). 27C128 usually use 12,5V and this is usually the default of the board. Note that you MAY get some chips that require the higher 21V. If you get a chip without visible Vpp try the lower 12,5V first. So far all the chips ive used worked with 12,5V.
=== Step 5: Select power source. If your Willem was sold as a "usb"-kit it will most likely be 3 === Ensure that all these pins are in usb normal chip usage position and if your got a "poweradapter"-kit it will be in that position. Note: if USB cable (5Vnormal usage for this chip of cause) . This is used the default posistions, so with a little luck you can only READ eproms .. wont have to write/burn eproms you will need a power adapter touch them at 9V, 12V or 15V to supply the 6V needed for writingall.
=== Step 6: The "write protection" jumper. Probably the only jumper you actually have 4 ===Select software version to set manually yourself When your are READING your eproms .. make sure to keep this at 5V normal positionfit board (default).
=== Step 75 ===Select power source. If your Willem was sold as a "usb"-kit it will most likely be in usb position and if your got a "poweradapter"-kit it will be in that position. Note: if USB cable (5V) is used you can only READ eproms .. to write/burn eproms you will need a power adapter at 9V, 12V or 15V to supply the 6V needed for writing. === Step 6 ===The "write protection" jumper. Probably the only jumper you actually have to set manually yourself When your are READING your eproms .. make sure to keep this at 5V normal position. === Step 7 ===insert your 27128 or 27C128 chip like shown. Make sure that the Notch points UP towards the handle (see green circle). Ensure that the chip is inserted at the BOTTOM and that all the chip legs fit correctly. Then press down the handle to secure the chip in place.
Warning: inserting the chip wrongly may damage both the chip and board. Always doublecheck the chip is correctly in place.
=== Step 8: ===hook up power source (adapter or usb cable). Again, if you really intend to use the Willem "for real" you will need a real adapter as even tho the usb cable feels like a nice plug and play-ish, its good to have the ability to write too. The "Jack in" on the board seems to be a normal round jack stick like used with most common adapters. Looks like the same jack as used by Amstrad monitors.
== Reading a (ep)rom ==
Better make a quick hardware test:
[[Image:Eprom06.JPGjpg|400px]]
And you hopefully get a "Hardware Present".
Then all you do is press the "READ" botton and the rom is read in 2-3 seconds. To see what has been fetched click on the "BUFFER" tab below and youll see something like:
http[[Image://pchan.250free.com/Eprom13.JPGjpg|400px]]
Then just hit the "SAVE" button to save the file. The software defaults the save format to a binary .bin file. Note that you may need rename the files after to a .ROM file (large letters) if you want them to be recognised by most amstrad emulators