Vintage Computer Hardware | Forum profile

Quote: Originally Posted by lynchaj Hi Chuck! The jumper on the PCB is normally open for AT to XT conversion right? The PICs are on their way to Hargle so we should be hearing something soon on the AT2XTKBD project status. My board is working fine and all the PICs programmed OK, AFAIK. Hi Andrew! Yes, that jumper's just there for future expansion. I'll keep my fingers crossed.

Actually, there is a general aversion to making stuff unless it is absolutely necessary. Rent or buy is the rule. Partly because of time constraints and partly because there are many props people with limited construction skills. A good props person has a huge file of contacts of where to get stuff. However, I used to brag that I could make something faster than you could rent it. That was only sometimes true but I liked the challange!

Thanks Mike! I'll let you know when they get here. Merry Christmas to you too!! Kyle

Hi! Would there be any interest in an 8 bit ISA USB adapter? I saw a recent thread on CCTALK mailing list on the subject and wondered if there were sufficient interest to do VCF group project. Working with Chuck and Hargle, there have been a couple recent VCF homebrew projects that turned out well (XT-IDE, AT2XTKBD) Here is the thread on CCTALK: http://classiccmp.org/pipermail/ccta...er/279840.html Of particular interest is this comment...

Quote: Originally Posted by hexsane In my PET I discovered that the huge 15V 23000MFD Filter Cap was bad after installing a SuperPET board set. I've replaced it with a 15V 18000MFD cap that I had here. Power supplies are not my forte. The signal is nice an clean on my scope and there are no odd voltage spikes on power up. Will this work without a problem or will I need to get a 23000MFD to replace the original? Also will adding another...

The rule for adding capacitors is parrallel is the same as resistors in series. I would attempt to stay as close as possible to the original design specification. Given that the tollerance of those fiter caps is about +/- 20%, I think you would be just fine replacing that bad cap with the 18000MFD cap. The test for power regulation of your board would be to look at the DC voltage on the AC scale of you multimeter. If the the ripple value...

Quote: Originally Posted by MikeS @ Hargle &c: is the ~$10.00 just for the PCB, or the whole kit & kaboodle? I'm thinking the whole thing, but I've been known to underestimate things, so take that with a grain o' salt. If you make me solder the device together, it may be a bit more. I think the device is ~3 bucks worth of components, I can't imagine a 3/4"x3/4" PCB can cost more than $7...

Did mention I spoke with the producer of The Red Green Show, he said the keyboard was a C64, this was conveyed to me in an email.

Quote: Originally Posted by per The only thing would be that it is able to update the screen faster. However, at the time PCI graphics card started to appear, software programmers abadonned DOS and went over to Windows 95. Because of this, there is not really any DOS programs that takes advantage of the greater speed. Actually, there were quite a few DOS games that did take advantage of the faster PCI cards through VBE 2.0 . There were even...

Doesn't a USB controller depend on the CPU to function? Its an interesting proposition to add USB to an 8 bit machine, but what do you envision it being used for? Are we talking mostly HID devices? or Mass storage?