Recent content by hjohnson

https://forum.vcfed.org/index.php?threads/website.1246951/ some recent discussion of Norton blocking the forum from user's browsers who have Norton 360 protection. It's in the "off topic" forum, and so may be unnoticed by Forum management. I and the thread originator did not find this "VCF...

Norton on one's PC has a "firewall" feature. Under "intrusion and browser protection" there's "URLs to exclude from app monitoring" with a line "configure". that brings up an editable list of URLs that supposedly will be ignored. I've tried to add "forum.vcfed.org" but I have not had success...

https://www.retrotechnology.com/restore/exorset_other.html Reference to some Mikul 6809 boards, owned by a colleague of mine. Contact me to arrange contact. As these were an industrial product, tech details on them may have been (still be) proprietary. Sellers of these on eBay still service the...

First: to Davey. This won't immediately help, but as a favor please identify the exact iMac model, there were many. It's a pain to identify iMacs, I grant. The value of the Apple "service manuals" is to identify boards in use with given models, so start there. How about, the Apple part number...

https://www.applerepairmanuals.com/index.php (access with caution, avoid downloading "PDF" software) (or use archive.org and search for "imac g3 apple service manual") There's many iMac G3 models. These Apple manuals provide basic board-level descriptions and parts. Won't provide component...

I came across this thread and original post from early July. Time has passed by this discussion, but I don't think the questions of the original post were fully addressed, in my opinion of course. There's an off-topic question about the transaction, and an on-topic question about some unknown...

As a follow up to this thread. There was discussion about floppy controllers for the intellec 80. After my correspondence with Mattis, I found this reference on the Web: https://collections.museumsvictoria.com.au/items/397473 iCom produced a stand-alone floppy controller in in the era, and...

Thanks to Al Kossow, for gathering and scanning these SSM 80-pin boards. The thread caught my attention today, as did the boards. I took some time to look at Al's photos and compare the boards, see if they all fit together. The short story from my view, is that the CB-2 board seems to be...

Vector's VSX eight -bit and 16 -bit dual -processor micro offers a Z -80B and 8086 with 128K RAM. Prices start at £3,800. More information on [reference number for mail-in get-more-info postcard] this was in a July 1984 edition of Practical Computing magazine, essentially a product...

Thanks Bruce, good to hear from you. I sent Mattis a disassembly some days ago, of the disassembler and what seems to be a "V4.0" of Intel's MON-80. (It's possible someone modified a 3.0 or earlier and called it "V4.0".) And that disassembly is on my MON-80 Web page with other versions of...

http://www.nj7p.org/Manuals/PDFs/Intel/9800031A.pdf - the AP-7 document the Intel in-481 document is listed on this Web page via https://www.intel-vintage.info/intelmemory.htm look for the in-481 reference; it's to a Google drive with a long URL that may be time-limited Regarding the AP-7...

Someone directed my attention to this thread, seeing as my name and interests were discussed here. This Web page explains what I mean: https://www.retrotechnology.com/dri/torode_origins.html There's a few loose threads I can pick up on from this discussion. 1) Mattis contacted me about his...

It's an interesting board. Essentially it has both a hard-sectored controller, and a soft-sectored LSI-chip controller, and its own Z80 locally. But what you call "PROMs" also include programmed logic chips, essential to basic operation. You'll have to verify programmed those chips, almost...

Hmmm. Seems conversations are contained with XenForo and are not actual emails. At best I found a profile option "alert me if my conversation gets a reply" or some such. Is that how "private messages" will work? I and recipient get a real-email alert? - regards Herb

Well, I followed that suggestion - left the forum, came back - and this message stub was waiting. I had a second such abandoned message, I used the "delete draft" dialog, I'll see if that happened. Otherwise, another go-away strategy seemed to work. While editing the reply, I simply refreshed...