Real Old School Programming (was: Re: Where to buy a Selectric?)
cclist at sydex.com
Sun Jan 1 16:33:13 CST 2006
On 1/1/2006 at 3:12 PM Mike Loewen wrote:
> It's the real deal, as far as I know. I know next to nothing about
>systems. The sign says it's a model 6600, serial number 1.
I recall a CE friend once telling me that he'd worked on that particular
system and that the divide unit had been modified considerably such that it
didn't deliver the same results as any of the other 6600's. It might be
that SN 1 is so old that it wasn't possible to put CEJ into it without
rebuilding the whole darned thing.
The DS program in the CDC reference manual makes no sense from an IPL
standpoint on a stock 6600:
0001 7505 DCN 5
0002 7705 2020 FNC 2020,5
0004 1437 LDN 37
0005 7405 ACN 5
0006 7305 0011 OAM 11,5
0010 0300 UJN 0 (hang)
Since, at deadstart, PP5 would be active and waiting for input on channel
5, the code makes no sense. My best guess is that the photographer shot a
photo of a lashup with 4 PPs or less used for debugging the I/O interface
at Chippewa Falls.
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