Lars Brinkhoff wrote: > Lars Brinkhoff wrote: >> Below is the PDP-6 Microtape (DECtape) bootstrap code used at the MIT >> AI Lab. There are some of us wondering why it was written this way? > Has anyone imaged any MIT DECtapes?
Thanks to Peter Samson and Al Kossow, we got some MIT DECtape images. They didn't have any suitable boot blocks, but in a deleted block there was this source code: https://github.com/PDP-10/its-vault/blob/master/system-tape-generator The HACK macro takes input words and writes them as two halfword instruction and a SETZM. All which have the high bit set as needed by the loader. Also, they are subtracted with 1. _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
