Re: C64 board ROM chip spacing

From: Michał Pleban <>
Date: Thu, 02 May 2013 13:57:10 +0200
Message-ID: <>
Hello! wrote:

> The raster for placing them is 0.8" in the regular 64 

On all boards, right? I know there are several revisions of both the new
board (the mega-PLA has or has not the color RAM inside) and the old
board (different placement of SID/VIC/PLA).

> .. 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.

Ah, then a separate version for the SX-64 would need to be made.
Fortunately, I split this into two small boards - one with the ROM
plugin, and one above it with the Flash/CPLD chip. Only the bottom one
is changing :-)

> Don't you like the layout I did? ;-)

I didn't see you made any? Where?


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Received on 2013-05-02 12:01:00

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