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In response to Steve's question viewtopic.php?f=7&t=619#p4044, here's what I'm using to burn EPROMs for the Dragon

1) Willem Eprom Programmer
http://www.ebay.com/itm/Willem-EPROM-Pr ... 3a7ab6e27b
You will also need a standard 12V power supply to power it, and a Windows PC with a parallel port. I'm using Windows XP, not sure if the burning utility will run on Vista/Win7.

2) UV Eprom Eraser
http://www.ebay.com/itm/UV-Eprom-Eraser ... 2ebeb25902

3) IC extraction tool - highly recommended (although you can also use a flat screwdriver, but be careful).
http://www.ebay.com/itm/IC-Extraction-T ... 41680b1073

4) EPROMS
The Dragon's ROMS (IC17 & IC18 as well as DragonDos) are 16K (128 bits) 27C128 eproms.
You can just as well use 32K/64K 28 pin eproms like the 27c256 / 27c512, which are easier to find .
http://www.ebay.com/itm/5PCS-IC-M27C256 ... 43b1d016dc

For the larger eproms, just create a binary image in the appropriate size (32768 or 65536 bytes), with your rom data as the last 16384 bytes of the bin file.
If you use these larger Eproms, you can also quite easily build a bank switching adapter. See this post for instructions: http://www.delcohacking.net/forums/view ... ?f=11&t=56

This may look like a lot of details, but actually once you have it running burning EPROMS is a snap.

Thanks Ken!

KenH wrote: 1) Willem Eprom Programmer
http://www.ebay.com/itm/Willem-EPROM-Pr ... 3a7ab6e27b

Is it possible to re-use the original Dragon 64 EPROM chips with this programmer?

zephyr wrote: Is it possible to re-use the original Dragon 64 EPROM chips with this programmer?

Sure, but you do need the UV EPROM eraser.
Peel off the sticker which covers the window in the top of the Dragon's EPROMS and expose them to UV light for about 10 minutes.
Once they are erased they can be reprogrammed.

I have ordered all three items. Will let you know if/when they arrive.

Regards,
Steve

Both items were shipped on the 16th, but I have been informed that the EPROM programmer could take up-to four weeks to arrive.

Vatanu wrote: Vatanu : Notification of a payment and day delivery
Sawasdee and Hello Steve,
Thanks you for shopping to us.
Delivery : We can shipping the products on 16 October 2012
We will sending image Bill from post office Confirms shipped by email, after process shipped complete.
Shipping & Handling by Standard Air Parcel Post
Delivery : The products will arrive in 2 to 4 Weeks. ( Worldwide )
Order Date: Oct 15, 2012

zephyr wrote:Both items were shipped on the 16th, but I have been informed that the EPROM programmer could take up-to four weeks to arrive.

Yeah, shipping time from China/Far east can take a while.
I'm still waiting for the Max232 level shifter I've purchased a couple of weeks ago for a Dragon-Parallel to Drivewire adapter.
http://www.ebay.com/itm/MAX232-RS232-To ... 43b406f710

Ken, Which make/model of EPROM eraser/programmer do you use?

zephyr wrote:Ken, Which make/model of EPROM eraser/programmer do you use?

I use the Willem EPROM programmer. The same model as in the list above.
It's an entry level programmer, but for occasional EPROM programming it does the job fine. Never had any problem.

What is the make/model of your UV EPROM eraser?

zephyr wrote:What is the make/model of your UV EPROM eraser?

The list above is exactly what I have. There may be other more advanced solutions, but this is what I've been using now for over 5 years and it works!
The UV eraser is simply a box with a UV light bulb inside. Very low-tech...