I just recently made a digikey cart for quad too, but the memory chip I picked is not yet proven. I received all the parts and pcbs a week ago, but haven't built and tested it yet.
Now I'm on vacation until the 2nd, and then a few days later is Tandy Assembly. I might possibly build them before TA, or at TA. In any event it'll be at least some weeks before I can say if it works. On Sep 21, 2017 6:33 AM, "Jim Anderson" <[email protected]> wrote: > > -----Original Message----- > > > > Thank you for spotting that. I have found it and uploaded a copy to the > > linked google drive folder. > > > > Just for the record, it was still there in the form of the reference > > links to the original files from Steven's upload folder on club100 and > > Ah, okay, I found it now. I think I missed the folder it was in when I > originally went looking. > > > I'm trying to make a recipe that can be followed, so that "build your > > own" does NOT translate as "figure it out". > > It's very much appreciated - I don't have the experience with this sort of > thing to be able to figure it out on my own where there are vague things > that someone with experience would 'just know' which chip was right and > which was wrong, etc. I'm a pretty adventurous person normally and I've > learned a wide range of skills over the years. I usually try to tackle > anything myself first, and I've rarely had to completely give up and throw > in the towel on projects of all sorts. > > I think I actually had a bit of a mental block when it came to the idea of > building something like this because I'd had some headache-inducing > experiences when I was a kid trying to build some simple circuits using 555 > timers that kept going up in smoke because I was too young to think about > things like how much current this chip might actually be able to pass :)... > then later had an EGA card for my PC which I'd got from a friend who worked > for a local company which built them. I only had a monochrome monitor at > the time and he told me it would work with it, it just needed 'a simple > modification', which turned out to be a daughterboard (which I tried making > myself with an etching kit) with a PAL or something on it which needed to > be programmed. For the guys at this company, that was 'simple' and no > doubt when you have easy access to the equipment to burn PALs or EEPROMs > it's as simple as it would be for me to see some part of my kids' swing set > fracturing and think 'I'll just weld that up, it's a simple fix'. That > whole thing with the EGA monochrome daughterboard kind of put me off > building anything involving ICs or PCBs and I guess it's an experience it's > taken the rest of my life (until this week) to get over. (I hope!) > > > I need to write something clearer about the roms too. There are a few > > I actually found the zip file you're referring to with the ROM images back > when I first started playing around with REX in VirtualT. That's how I > fell in love with it and first started trying to order one and/or find out > more about getting some for my physical machines... > > > I think there must also be some work-alike flash memory chips available > > from DigiKey that could be added to the digikey cart so you can get > > everything at once instead of having to do that annoying special order > > from Verical. > > If there is one available from DigiKey that will do the job, that would be > fantastic news. I haven't ordered the parts I need from DigiKey yet > because I was guessing at some of the ones for QUAD (there are a lot of > different subtypes of many of these parts and I don't have enough knowledge > to judge which ones are suitable equivalents and which ones aren't - I > might need to ask Stephen for some clarification but I need a breather > first after that shipping BS). If there was some equivalent flash chip I > could get from DigiKey instead of Verical that would absolutely make my day. > > > > > > > > jim >
