G'day Dave - I will contact you off-group with information... Bruce Bruce Ray Wild Hare Computer Systems, Inc. On 2/13/2014 2:35 PM, David Williams wrote:

On Feb 13, 2014, at 1:35 PM, David Williams <dave at willomail.co.uk> wrote: You're looking for a 4010 "basic I/O board". They tend to turn up fairly regularly on ePay in the US; if you can't find one I'm pretty sure Bruce or I can find a spare. The 800/1200 all use the Nova 800 console board. Yes. I don't have a 1200 in my collection and thus haven't bothered to find prints for the 1200, but I'm pretty sure Bruce has a copy. Good question. In a 1200, 800, 830 or 840 I'd know the answer to be "yes", but the 820, 1210 and 1220 use an integral power supply that I've never seen in my life. The How To Use and Abuse manual specifies input as 115 or 230 VAC, 47 to 63 Hz, but it's certainly not auto sensing -- you'll have to move jumpers. The common traps are failing to understand how the interrupt and data channel priority and acknowledge lines (intp, inta, dchp, dacha) need to be jumpered around empty slots and the need in larger chassis to keep a board in the topmost slot if there's not an external terminator on the I/O bus ) -- otherwise the bus rings like a bell and the machine will exhibit seriously unwanted behavior. The 1210 is a baby chassis. CPU goes in slot one, slot two would *typically* get the basic I/O board (unless you have the 8107 hardware multiply/divide option which needs to be in slot two) with slots three and four available for memory or I/O. On the 1210 (when viewed from the back) there's a large edge connector on the backplane that is the external I/O bus; you may or may not find a terminator sitting on it. Next out from that (if present) would be a card with three edge connectors; the top most would be the connector for the factory paper tape reader option, the middle the EIA option and the bottom the paper tape punch option. The teletype would be a push-on connector on the backplane, although from the sounds of it you won't have this present on your machine and you'll need to wire wrap one into place. If you're looking for a discrete paper tape reader (as opposed to using the reader on an ASR TTY) you'll need the paper tape reader option on the basic I/O board, option 4011 (or you'll have to add it yourself -- it's not hard). You should look for a copy of "How To Use The Nova Computers". I have a preference for the 1972 (brown-covered with a photo of a stack of 1200s) version over the 1970 version (white cover with a photo of a stack consisting of a nova 800, a supernova and a unicorn, aka supernova SC). It's a good one-stop shop for a lot of stuff (although you'll still need the prints) Welcome to the brotherhood of Edson de Castro ;) Cheers, Chris -- Christian Kennedy, Ph.D. chris at mainecoon.com AF6AP | DB00000692 | PG00029419 http://www.mainecoon.com PGP KeyID 108DAB97 PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97 "Mr. McKittrick, after careful consideration?"