Jumper settings for baby M68k CPU board version 1.0.002

 

     Jumper          Schematic          Setting

 

          J1                 p. 5               Flash:  1-2 & 3-4     (see schematic)

                                                   EPROM 1-3 & 2-4

 

          J2                 p. 7               3-5 & 4-6   (most conservative)   (I/O wait states:  rd = 2 w.s., wr = 3 w.s.)

                                                   or [1-3 & 2-4]       (I/O wait states:  rd = 1 w.s., wr = 2 w.s.)

 

          J3                 p. 7               2-3          (most conservative)  (Memory wait states:  write = 1 w.s.)

                                                   or [1-2]              (memory write = 0 w.s.)

 

          J4                 p. 8               open        (no external memory beyond 0x300000)

                                                   closed     (external board with memory up to 0x380000)

 

 

It is strongly suggested that you consult the schematic pages to confirm

the jumper settings that you want to use.  J2/J4 may be altered for fewer

wait states; the above are the most conservative settings.

 

10-Aug-2011   jrc