On 2013-05-02, at 13:12, Michał Pleban wrote: > Hello! > > I am building a ROM replacement for the C64, and I am finalizing the PCB > layout. The PCB will be plugged into the sockets for all three ROMs > (CHAR, KERNAL and BASIC), so I need to know the exact spacing between > these ROM chips. I had to measure this too, not so long ago :-) > > I have the ASSY 250425 (old) board, with three DIL24 sockets. I measured > that they are spaced 0.2" apart. > > Then I have the ASSY 250469 (new) board, with one DIL24 and one DIL28 > chips. They are also spaced 0.2" apart. The raster for placing them is 0.8" in the regular 64 > Unfortunately I have no other boards. From what I saw in various photos > found in Google, all the other boards should also follow one of these > two ROM layouts and spacing, but I am not sure. And I have no idea about > the SX-64. Any help would be appreciated. .. and 0.9" in the SX. Also on my SX boards (I am not sure if there were other revisions than 251102A) KERNAL is 28 pin (2564) while the other are regular 901225/6 with 24 pins. My guess is that for the quantities of the SX-64 CBM was able to shifting at the price, it didn't pay to make a new ROM chip. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2013-05-02 12:00:43
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