Hi Bo, > The C64's original kernal rom isnt that different from the vic20's kernal > rom. It's simply shifted up 3 bytes because the basic rom needs a jmp $e000 > to span the gap the I/O space causes between the two roms. In the vic20, > these roms are adjacent in the memory map, and the jmp is unneeded. You well, that is not true. For the BASIC portion, you're right; but the ROMs contain a second part, the KERNEL. The KERNEL starts at $E3xx, if I remember correctly. While there aren't really much differences with the BASIC part, except for what you have described and the USR()-vector, there ARE differences with the KERNEL part. Gruß, Spiro. - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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