🚀 go-pugleaf

Re: Kevin Bertram's request for info -

                Notes on Inmos IBM board

  This board occupies 32 locations on the IBM I/O bus, from 0150 through to
016F.  This space is divided into two parts, each of  which is individually
selectable by jump links at the back of the board.

  The area 0150-F is designated  "LADP" and contains  the C002 link adaptor
as follows:-

        0150    Input data register
        0151    Output data register
        0152    Input status register
        0153    Output status register

This  repeats throughout the block.   This area is only  selected if pin b6
("NotLink") is grounded on the  back  connector.   These addresses are also
repeated at 0550, 0950 and 0D50.

 The area  0160-F  is  designated  "SYS" and contains   the reset and error
status lines.  These are mapped as follows:-

    Write
        0160    Reset (Including link adaptor) (Bit 0, active "1")
        0161    Analyse (Bit 0, active "1")
        0162    (Interrupt on error enable ?????)
        0163

    Read
        All locations read the inverse of the error line in D0

These repeat throughout  the block and are also  repeated at 0560, 0960 and
0D60.  This area is only selected if  pin b27 ("NotSystem")  is grounded on
the    back connector.  These  lines are    not directly  connected to  the
transputer but appear on the back  connector, and  may then be  jumped onto
the transputer system.


  The address decode is performed by a 16L8 (which does nothing else) and so
is easy to customise.  On ours the interrupt on error does not seem to exist.

  Please note that above information is gathered by observation, not from
Inmos.

                                Jim Garside