PDP 11/34

On Jul 1, 13:26, Mike Kenzie wrote: These are paper tape versions of XXDP+ diagnostics. There's some documentation on my web page about XXDP. Compaq still list the PDP-11 doc set: ZJADX-GZ PDP11 XXDP DOC. KIT $187.00 (By the way, does anyone have a copy of that? I'm curious to know how complete it is). Possibly a bootstrap loader or APT monitor program (for the diagnostics) MOS/Core diagnostic test, tests up to 124KW if you set 10000 in the switch register, otherwise tests 0-28KW Some kind of processor test (not processor-specific) or memory test (might be a core-specific test -- worst-case test patterns for core are different 11/34 CPU test 11/34 CPU test (part 3) 11/34 CPU test (part 2) 11/34 CPU test, part 1 (main instructions) MF11 diagnostic DL11 serial line test (this might need a loopback plug) DL11 serial line test (same test, later revision, I think) Several of these tests change their behaviour slightly according to the contents of the switch register when you run them. I don't have the details for most of these tests (anybody got an XXDP microfiche set?), but taking ZKMA for example: bit 15 set = halt on error bit 14 set = loop in selected subtest (see bits 0-3) bit 13 set = don't print errors bit 12 set = enable memory management bit 11 set = enable parity testing (default is ignore parity bits) bit 10 set = halt after each sub-test bit 9 set = don't do program relocation (so it can't test all of memory) bit 8 set = test in blocks of 4K, and print the first failing bit in each block bit 7 set = enable "long galloping test" (takes a while :-)) bit 6 set = don't size the memory (normally the diagnostic tries to work out how much memory there is to test) bit 5 set = don't print "END PASS xx" (normally does this every time round the loop) bit 4 set = don't print anything bits 0 to 3 are used to select a single subtest. See bit 14. -- Pete Peter Turnbull Network Manager University of York