Willem Programmer + 27C400 EPROMS

[billt]

I had a lot of problems trying to get my Willem to deal withthe AmigaOne FLASH chip. Turns out the chip enable pin wasn't pulled either high or low (I forget which it needed but I think low) and was floating. Try the test section of the Willem software and make sure your pins are toggling as they should, and add any resistors or whatever that is needed.

[alexh]

@Motorolin,

If you havent already bought it and you intend to program lots of sets of EPROMs (Or, as I suspect, one pair of EPROMs lots of times). Get the more expensive version with ZIF sockets.

[Plaz]

There are serveral versions of willem, so this may not all apply but here are some tips. Your adapter may not look exactly like the one in the picture (mine doesn't), but it should have 27c400 stenciled some where on there so you know it's the right module. The program will prompt you to install the module, but can't tell if you have or not. So as long as you have it plugged in, ignore the message.

You need to match the switches you see on the screen with the switch settings on your board. Mind which is #1 and the oreintation of your board (up or upside down as you match the screen). If your willem has USB, you probably need to plug the USB cable in. It get's power from the USB for  programming voltages. Also the eprom on my module seats to the bottom of the chip socket leaving the top to pins open. If you have it seated to the top, you'll get trash when you read. I'll try to diagram what I mean but the text editing here is tough to work with....

Pin 1 and 42 open at the top of the socket
0 = open    @ = eprom legs

0 _open 0
@ rom  @
@ rom  @
@ rom  @
@ rom  @
@ rom  @
@ rom  @
@ rom  @

Plaz

[motorollin]

@billt
I will try that if I still can't get it working once I have the correct adapter.

@alexh
You're right, I will be programming the same EPROMS more than once. Will have a look for the ZIF version.

@plaz
My adapter board doesn't have the two extra pins at the top of the socket. It looks like this:

@ rom @
@ rom @
@ rom @
@ rom @
@ rom @
@ rom @
@ rom @

I'm going to order the correct one when I get back from holiday and try again.

--
moto

[irishmike]

I was wondering about how you would take a file like kick.rom and transfer it to EEPROMs.

I had another thread going, but figured that this one might be related.

Appreciate it if someone could enlighten me.

[alexh]

You buy an EPROM programmer, you get the RIGHT adapter ;-). Fire up the EPROM software, select kick.rom and hit PROGRAM.

You make sure that your kick.rom isnt encrypted
You make sure that you use the right EPROM's.
You make sure that you split the EPROMS (usually automatic in the programmer software) into HIGH and LOW bytes / words.

[TjLaZer]

Don't forget to do a byte swap or it won't work!

[motorollin]

Well, I feel like the biggest idiot in the world :-)

I posted a thread on the Willem forum about this, and someone posted a complete guide on using the equipment I had bought. Turns out I was using the wrong socket on the adapter :lol: I used the 40 pin one because the type of socket matched the one on the Amiga. The other socket was a different type, but turned out that it was the correct one and the 27C400 chips did fit!

The upshot: I've just watched my A1200 boot to a Kickstart 3.9 screen :-D

--
moto

[QuarX]

Hello.

Sorry i have the following idea view this topic.

Hmmmm. its possible port to the AMIGA any eprom programmer program to get working WILLEM programmer together the AMIGA.

 :idea:

Ciaooo.

Jose.

[motorollin]

It is possible. But you would either need the original source code, or write your own application. I have searched and cannot find any software for the Willem programmer except for Windows :-(

--
moto

Just reviving this old thread...

Reading what was in there confirms what I suspected...

Buying a Willem programmer is an attempt at saving money by going through tons of problems.

I decided to buy myself a 600$ USB device that supports nearly 11'000 devices without any adapters or jumpers.

So far it worked on first try with everything I could throw at it except the old Motorola MCM68764. It could read them but not program them. I contacted the manufacturer and a software update is already on the way.

It programs both memory chips AND microcontrollers of nearly all kinds such as PICs, Atmel's AVRs and ATMEGAs.

[countzero]

tons of problems ? I didn't get a single problem burning amiga roms when I got my willem, thanks to the good documentation in amiga user forums. And since I don't need to burn anything other than amiga roms (and the odd scsi roms every now and then) I'm glad I didn't pay X00$ for the burner !

OTOH, I'll soon receive a dead plus/4 computer, which is probably dead due to dead TED. I wonder if you could help me with that eslapion ?

countzero wrote:
tons of problems ? I didn't get a single problem burning amiga roms when I got my willem, thanks to the good documentation in amiga user forums. And since I don't need to burn anything other than amiga roms (and the odd scsi roms every now and then) I'm glad I didn't pay X00$ for the burner !

OTOH, I'll soon receive a dead plus/4 computer, which is probably dead due to dead TED. I wonder if you could help me with that eslapion ?

Perhaps I was interested in being able to do (much) more than just Amiga ROMs  ;-)

Concerning the Plus/4, what is a TED ? I can make substitute chips for the PLAs used in that machine but that's pretty much all I can do for them.