{"id":480,"date":"2015-01-05T22:08:06","date_gmt":"2015-01-05T22:08:06","guid":{"rendered":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/?p=480"},"modified":"2015-01-05T22:24:44","modified_gmt":"2015-01-05T22:24:44","slug":"simh-revamp-episode-2","status":"publish","type":"post","link":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/2015\/01\/05\/simh-revamp-episode-2\/","title":{"rendered":"SIMH revamp episode #2"},"content":{"rendered":"

OK, so a confession – I may have contributed to my SIMH VAX emulator DECnet connectivity issues. At various times I’ve had the bridge software (that squirts TCP\/IP UDP packets containing DECnet data too and forth between DECnet area routers) running on a Raspberry PI. The Kingston SD CARD I had in the PI started exhibiting weird errors so I ordered another one pre-installed with noobs. \u00a0SD CARDS seem to vary enormously in quality, speed and reliability so I thought I’d just spend a couple more quid and get one that was recommended.<\/p>\n

So last night I compiled up the bridge software on the Raspberry PI, went to configure my ADSL router to change routing of UDP packets on port 4711 to the PI rather than the HP Microserver that was causing all the grief only to find that the NAT configuration was already pointing to the PI! This would have caused no end of grief – and could have been the root cause of my problems. Anyway, I thought I persevere with this option as I’d also found other issues with the HP Microserver networking and am now happy to report that connectivity issues appear resolved.<\/p>\n

The SIMH VAX instance on the HP Microserver appears on hecnet as SIMVAX (node address 4.248). Success means an area list like this:<\/p>\n

SIMVAX$ mcr ncp show known areas\r\n \r\n \r\nKnown Area Volatile Summary as of  5-JAN-2015 21:58:34\r\n \r\n  Area    State          Circuit           Next node to area\r\n \r\n  1       reachable       QNA-0              1.15 (PONDUS)\r\n  2       reachable       QNA-0             59.11 (DIMMA)\r\n  4       reachable                          4.248 (SIMVAX)\r\n  7       reachable       QNA-0              7.60 (BITXOV)\r\n  8       reachable       QNA-0              8.400 (GORVAX)\r\n  9       reachable       QNA-0             59.11 (DIMMA)\r\n  11      reachable       QNA-0             11.2 (MAISA)\r\n  12      reachable       QNA-0             59.11 (DIMMA)\r\n  18      reachable       QNA-0             59.11 (DIMMA)\r\n  22      reachable       QNA-0             42.1022 (HUB)\r\n  23      reachable       QNA-0             59.11 (DIMMA)\r\n  28      reachable       QNA-0             28.41 (RULLFS)\r\n  33      reachable       QNA-0             59.11 (DIMMA)\r\n  42      reachable       QNA-0             42.1022 (HUB)\r\n  47      reachable       QNA-0             47.556 (KUHAVX)\r\n  59      reachable       QNA-0             59.11 (DIMMA)\r\n  61      reachable       QNA-0             42.1022 (HUB)\r\n<\/pre>\n
This is now reflected on the internet at http:\/\/hecnet.eu\/area-list.html<\/a>.<\/p>\n
Showing the circuit give a list of the adjacent router nodes:<\/p>\n
SIMVAX$ mcr ncp show circuit *\r\n \r\n \r\nKnown Circuit Volatile Summary as of  5-JAN-2015 22:03:41\r\n \r\n   Circuit          State                   Loopback     Adjacent\r\n                                              Name      Routing Node\r\n \r\n  QNA-0             on                               59.11 (DIMMA)\r\n  QNA-0                                               1.13 (MIM)\r\n  QNA-0                                              42.1022 (HUB)\r\n  QNA-0                                               8.400 (GORVAX)\r\n  QNA-0                                               7.60 (BITXOV)\r\n  QNA-0                                               1.15 (PONDUS)\r\n  QNA-0                                              11.2 (MAISA)\r\n  QNA-0                                              28.41 (RULLFS)\r\n  QNA-0                                              47.556 (KUHAVX)\r\n<\/pre>\n
I can now do fun things like jumping on other machines in the network, including simulated and real PDP, VAX, Alpha and Itanium boxes, for example:<\/p>\n
SIMVAX$ set host chimpy\r\n****************************************************\r\n\r\nXXXXXXX  XX   XX  XX  XXX   XXX  XXXXXX  XXX   XXX\r\nXX       XX   XX  XX  XXXX XXXX  XX   XX  XXX XXX\r\nXX       XXXXXXX  XX  XX XXX XX  XXXXXX     XXX \r\nXX       XX   XX  XX  XX     XX  XX         XXX\r\nXXXXXXX  XX   XX  XX  XX     XX  XX         XXX\r\n\r\n        Part of the SAMPSACOM network\r\n\r\n****************************************************\r\n\r\n   Welcome to CHIMPY::, HECnet host 8.401\r\n\r\n   NEW! Access to a reborn WAFFLE!  Login as PYFFLE\r\n\r\n   Launchpad to various services:   Login with LAUNCH \r\n   VT100 Tetris Game:               Login with TETRIS\r\n   B4BBS, Yesterday's Tech Today:   Login with B4BBS       \r\n   CP\/M-O-Tron: Get your own Z80    Login with CPMOTRON\r\n   NEW - Cory's MPE\/IX box:         Login with MPEIX\r\n   To request an account, login with ACCOUNT\r\n<\/pre>\n
This may be somewhat unrelated to my Retrochallenge goals but I was really quite sick of this issue and thought I’d just persevere under the auspices of Retrochallenge until I was happy this was all now working.<\/p>\n
Onwards and upwards…<\/p>\n","protected":false},"excerpt":{"rendered":"
OK, so a confession – I may have contributed to my SIMH VAX emulator DECnet connectivity issues. At various times I’ve had the bridge software (that squirts TCP\/IP UDP packets containing DECnet data too and forth between DECnet area routers) running on a Raspberry PI. The Kingston SD CARD I had in the PI started …<\/p>\n
Continue reading ‘SIMH revamp episode #2’ »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[1],"tags":[41],"class_list":["post-480","post","type-post","status-publish","format-standard","hentry","category-general","tag-rc201501"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p73JhD-7K","jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/posts\/480"}],"collection":[{"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/comments?post=480"}],"version-history":[{"count":10,"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/posts\/480\/revisions"}],"predecessor-version":[{"id":490,"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/posts\/480\/revisions\/490"}],"wp:attachment":[{"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/media?parent=480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/categories?post=480"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.wickensonline.co.uk\/rc2012sc\/wp-json\/wp\/v2\/tags?post=480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}