lenny@alps.UUCP (Lenny Tropiano) (08/04/89)
Paging through the UNIX PC Reference Manual, I happened to see something of interest ... In the section on the Tape controller board they mention doing adjustments to the board. What they said in the instructions is to: ... 1. With power off, remove the Floppy Tape Controller board and insert an _extender board_ in its place. ... Now this sound useful for those hardware hackers out there (Gil, you listening?) ... -Lenny -- Lenny Tropiano, Project Manager / Sr. Software Engineer American LP Systems, Inc. 305-1 Knickerbocker Avenue UUCP : ...icus!alps!lenny Bohemia, New York 11716 PHONE: 1-516-589-7930
jmm@ecijmm.UUCP (08/08/89)
In article <170@alps.UUCP> lenny@alps.UUCP (Lenny Tropiano) writes: |Paging through the UNIX PC Reference Manual, I happened to see something |of interest ... In the section on the Tape controller board they |mention doing adjustments to the board. What they said in the |instructions is to: | |... |1. With power off, remove the Floppy Tape Controller board and | insert an _extender board_ in its place. |... | |Now this sound useful for those hardware hackers out there (Gil, you |listening?) ... This sounds like something I've seen for Multibus. Its a card with an edge connector on one end, a matching edge socket on the other, and a lot of straight-line traces between. It allows you to have a board in a running system and still get probes to various points for debugging purposes. There might be a few extra features (e.g. a switch to disconnect the board from the bus). Apologies if you already knew this and read the subject as Physical Extender rather than System Capability Extender. -- John Macdonald
jbm@uncle.UUCP (John B. Milton) (08/09/89)
In article <896@ecijmm.UUCP> jmm@ecijmm.UUCP (John Macdonald) writes: >In article <170@alps.UUCP> lenny@alps.UUCP (Lenny Tropiano) writes: >|1. With power off, remove the Floppy Tape Controller board and >| insert an _extender board_ in its place. Yes, this did/does exist. The problem, word has it, is that most of the boards, memory in particular stop working at the end of a LONG UNIXpc extender card. I recently shelled out bucks to get an Expansion box, just for hardware testing. With the cover off, it's easy to get at all the signals. The down side is that memory cards are not supported in the Exapnsion box. The UNIXpc bus spec leads one to believe that the memory specific lines are not even run out there :( John -- John Bly Milton IV, jbm@uncle.UUCP, n8emr!uncle!jbm@osu-cis.cis.ohio-state.edu (614) h:294-4823, w:785-1110; N8KSN, AMPR: 44.70.0.52; Don't FLAME, inform!