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The awesome GQ-4X programmer arrived early this morning, and it works like a charm (less than 4 seconds to burn and verify 16K on a 27C128). I am now the proud owner of a Dragon 64 with HD63C09E processor and Steve Woolham's Enhanced Dragon 64 ROMs v3.0 . 8-) I can now verify that the v3.0 ROMs wor...

The awesome GQ-4X programmer arrived early this morning, and it works like a charm (less than 4 seconds to burn and verify 16K on a 27C128). I am now the proud owner of a Dragon 64 with HD63C09E processor and Steve Woolham's Enhanced Dragon 64 ROMs v3.0 . 8-) I can now verify that the v3.0 ROMs work...

One thing that has struck me, does anyone have a list of bugs in Superdos that need fixing, as I may as well try and fix them whilst I'm about it, I can of course back port them to the main superdos code, so that we can fix the bugs in the normal version too. The only list I know of is attached bel...

No, you can't. Mask programmable ROMs are programmed during manufacturing. PROMs can be programmed once with a programmer. EPROMS can be programmed and subsequently erased using UV light. EEPROMS can be programmed and erased electrically. -- Rolf My apologies, Rolf. I deleted my post because I had ...

Thanks, Rolf!

Ciaran, I notice that you have released two snapshot versions since. What changes did you make after the release of 20120922? A few bits and bobs but the biggest work in progress (and I stress that it is *horribly* incomplete) would be the -machine-cpu option. Excellent (Hitachi 6309)! :D Hope it w...

I've had a go at fixing most of the issues in this thread, and pushed new snapshot builds out here: http://www.6809.org.uk/tmp/xroar/ Hopefully no regressions... The Address-Dependent CPU rate mode doesn't seem to quite tally, but it's much closer. This also includes new VDG code that copes with su...

Welcome to the Dragon forums!

Thank You for taking the time to explain this. Your help is very much appreciated. and the 24 pin AM2732's mentioned above? Hmmm... These are 25Vpp. You could probably buy a more expensive programmer that supports 21 & 25 Vpp Like this one: http://www.mcumall.com/comersus/store/comersus_viewitem.asp...

Hi Steve, Regarding your previous question, I'm not an expert on this issue, but I believe that any EPROM rated at 200ms or faster would work fine. The AM27C128 150ms will surely be fine. Ken, The original EPROMs in my Dragon 64 are HN4827128G's. Is this programmer capable of programming the HN6827...