On 02/28/2018 08:15 PM, Douglas Taylor via cctalk wrote: > Is there a document that describes the bank 7 memory page and what > addresses are reserved for what? I think I've seen this before but > can't seem to put my hands on it. > > Another question, bootstrap is reserved for 173000, how many words are > allowed there for this? How do the more complicated bootstraps, e.g. > microPDP11-53, accommodate this limitation? > > Doug > I strongly suggest RTFM the PDP-11 handbooks.
Till you do... Page 7 is the upper most memory area and is reserved as EPROM and IO peripherals. On many of the PDP-11s that page is signified by asserting BBS7 ( a partially decode address) and the MMU also understands that peripherals live in that physical space be it 16/18/22 bit memory map. Boot and diagnostic roms are a special case as more often their size was not limited to the area of bank 7 but the available devices of the day. They do however map roms so that they cannot overlap the IO devices. FYI the microPDP-11/53 is the 11/23+ cpu card so you can look that up. Allison
