This is the fourth 8B (B for business) that I have found out about. The original SCELBI was the 8H (for Hobby) and only supports 4K of memory. The 8B supports up to 16K of memory and a 4K PROM card.
The other three 8B’s are:
At the present time, I don’t believe that any of them work perfectly. I know that two of them have SRAM issues, but probably would work if the SRAM issues were resolved.
I’m looking forward to the day in the future, when I can say that I have reproductions of both the 8B and 8H running. However, I need to reproduce 4 additional boards before I can say that I have the 8B running.
As I am pretty busy with the 8H, at the present time, this is going to take some time.
Dave Larsen’s 8B
This 8B was built up by the original owner from a bare board set that he purchased from SCELBI Computer. The board in the middle is a TV Typewriter card that was sold by “The Digital Group”. This is the only SCELBI that I know of with a built in video card.
This one is in Dave Larsen’s collection and Dave provided the picture. Information about his collection can be found at http://bugbookmuseum.blogspot.com.
Hi Mike – Thank you for posting this about the SCELBI. I noticed the posting on my site with your link and a line of info about my SCELBI. Good info – I did not know the center card is a “Digital Group” as it does not seem to have any id info on the card.
The wiring done on the computer is quality so the original owner was a skilled technician. I have had this computer for many years and never looked at in in any detail before. This has been fun for me to look at all the cards and interface items he built into the system.
David Larsen at the “Bugbook Historical Microcomputer Museum”
Cameron recognized the Digital Group card, which was designed for the Mark 8. By the way, I have started exploring Mark 8 related newsletters for SCELBI stuff, since there is occasional SCELBI related information in the articles.