mort@apollo.HP.COM (Stephen Moriarty) (11/15/89)
I'm just getting my new IIe online and need a serial card.
Although $50 is very reasonable for a new one, I can't believe
it's that difficult to build one for much less money. Any info on
magazine articles, sources for blank IIe circuit boards, etc.
would be greatly appreciated.
Also, I'd like a slotless clock circuit, too. Maybe there exists
a do-it-yourself version of the Serial-Pro card. Thanks.
Stephen
ARPA: mort@apollo.hp.com UUCP: ...{decvax, umix, mit-eddie}!apollo!mort
Apollo, a subsidiary of Hewlett Packard, 330 Billerica Rd., Chelmsford MA. 01824
If we had been meant to play with electricity,
electrons would be big enough to see.blochowi@rt3.cs.wisc.edu (Jason Blochowiak) (11/17/89)
In article <46da0b3e.20b6d@apollo.HP.COM> mort@apollo.HP.COM (Stephen Moriarty) writes: >I'm just getting my new IIe online and need a serial card. >Although $50 is very reasonable for a new one, I can't believe >it's that difficult to build one for much less money. It may not be all that difficult, but unless you want to write your own terminal program to drive it, you'll probably have to make it compatible with something - the most common serial card is the Super Serial card (or clones). >Any info on >magazine articles, sources for blank IIe circuit boards, etc. >would be greatly appreciated. > [...] Uh, me too - I was also told that someone sold a bread board that stuck into one of the slots. I'm working on something for the //gs with a friend, and I'm just wondering if there's anyone out there that could give us some tips or "things to avoid" in //e (or, preferably, //gs) card design. We'd at least like to get past this without losing any motherboards ;) This will be a DMA card as well, so any tips there would also be appreciated. >Stephen >ARPA: mort@apollo.hp.com UUCP: ...{decvax, umix, mit-eddie}!apollo!mort -- Jason Blochowiak - blochowi@garfield.cs.wisc.edu or jason@madnix.uucp "Education, like neurosis, begins at home." - Milton R. Sapirstein
mort@apollo.HP.COM (Stephen Moriarty) (11/18/89)
In article <3759@puff.cs.wisc.edu> blochowi@rt3.cs.wisc.edu (Jason Blochowiak) writes: > It may not be all that difficult, but unless you want to write your >own terminal program to drive it, you'll probably have to make it compatible >with something - Absolutely. >I'm just wondering if there's anyone out there that could give us some tips >or "things to avoid" in //e (or, preferably, //gs) card design. jetzer@studsys.mu.edu pointed out that for starters, the blank IIe circuit boards cost $30! This isn't necessarily a consideration for you, but it does put a crimp in my "economy" design. ARPA: mort@apollo.hp.com UUCP: ...{decvax, umix, mit-eddie}!apollo!mort Apollo, a subsidiary of Hewlett Packard, 300 Billerica Rd., Chelmsford MA. 01824 If we had been meant to play with electricity, electrons would be big enough to see.
ericmcg@pro-generic.cts.COM (Eric Mcgillicuddy) (11/22/89)
In-Reply-To: message from puff!rt3.cs.wisc.edu!blochowi%speedy.wisc.edu@BRL.MIL A suggestion for would be card designers. Design a test jig first!! At Rye High we used a 6809 single board computer with two STD slots slaved to a PC. By the end of the year only one board functioned correctly. Most of the boards had various address or data line burned either high or low. The technician spent most of his time replacing 6522's as well (ever wonder what happens if you tie RTR to +12V? Apparently you aren't the only one.)