The large number of different clock patches that can be found in the falcon,
often causes uncertainties when installing the FX accelerator. For better
understanding this is a rough plan of the interestingarea:


                  | <- central source of 16MHz-CPU-clockt
                  R                      from COMBEL U56
    (1)    (2)    R <- R217
     |      |     |
   R216    R221   :
     |      |     :
     :......:.....:
                 :
                 |
               R222
                 |
                (3)



              .:. means: invisible conducting connection
              (1) leads to expansion slot
              (2) leads to DMA-chip and to the FPU
              (3) leads to the CPU
In all clock patch variations at least the resistors R216/R221 are removed and
an 74F04 or 74F08 is installed instead. For that on/two wire(s) lead from R217
or the lower connections of R216/R221 to the clockpatch.
Version 1: One wire from 74F04/08 connects the twoupper connections (1) and (2)
           of R216/R221.Version 2: Two wires separately lead from the 4F04/08
           to the upper pads of R216 (1) / R221 (2). Additionaly there can be:
           Version A: R222 is removed and a wire leads from the 74F04/08
           to (3). Then this wire has to be removed and the enclosed 33-Ohm
           resistor has to be soldered at R222. If there is already a
           clockpatch installed it should be generally left installed, but
           perhaps has to be modified:

With Version 1 AND FPU installed:
Re-solder the wire, so that it only contacts (1). At this connection also the
wire to the DMA chip should be soldered. Besides from this the clockpatch can
be left untouched. Only if problems/unstabilities occur in accelerated
condition, which cannot be resolved as described in the file DMA_PROB.GB,
installation of our version of the clockpatch, described in the manual
should be considered.

