Il faut d'abord que tu nous dise la version de fat agnus et de ta carte mère. Si c'est un 8372a, tu a juste besoin de faire un strap sur JP4 pour passer en NTSC.
iv-6. Installing the 8372a to Revision 6a A500's
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1. Remove the 8371 from its socket. Insert the new 8372a. NTSC users who do
not wish to use the PAL mode should go to step 3. When installing the new
Agnus, note that on the 6a board, the Agnus socket has been rotated 90 degrees
anti-clockwise from the orientation on the revision 5 board. For this reason,
plugging in the Agnus correctly is no longer an intuitive operation !
2. JP4 controls PAL/NTSC video mode. If you are in North America or Hong Kong
or anywhere else the National Television Standards Committee TV format is
used, this should be bridged by a track or a blob of solder. If you are in
Australia, Europe or anywhere else the Phase-Alternated Linescan TV format is
used, this jumper should be cut open. If you wish to install a switch, then
simply connect it across the two pads of the jumper.
3. Cut the track joining the center and upper pads of JP2, and the track
joining the center and upper pads of JP7a. (JP2 is between the CPU and the ROM
and JP7a is just to the left of the A501 connector). If you wish to install a
memory switch, proceed to step 4 otherwise solder the center and lower pads of
JP2 together. You have now completed the installation procedure.
4. Connect a DPDT switch as follows :
+-----+ BACK VIEW OF SWITCH
Upper pad of JP2 --+-o o | When held as shown, UP=512K CHIP, DOWN=1M CHIP
Center pad of JP2 -+-o o-+-- Center pad of JP7a
Lower pad of JP2 --+-o o-+-- Upper pad of JP7a
+-----+
You have now completed the installation procedure.
PS : C'est con avant il y avait le blog de cosmos pour toutes ces info, mais des boites l'on fait fermer.
