Hello! Jim Brain wrote: > I so notice that the 6509-powered B128 halts for a few seconds before > the BASIC prompt appears, while the 6502 one immediately boots to > BASIC. So, I must still have something wrong. No, this is exactly what is expected. The original 610 "halting" during boot is the memory test - it tries to test every byte in the DRAM and notes the amount of total memory found. This takes lots time in an unmodified KERNAL (I modified mine so that it tests only every 256th byte). Whereas your 610 with 6502 has no memory banking as of yet, so it cannot find any DRAM, therefore it does not perform any RAM test and boots instantly (or more precisely, it fails the memory test on the very first byte). That's what it should do. If you try to type any BASIC program, it should give you "OUT OF MEMORY ERROR". The function keys will also do not work. However, I *think* you should be able to issue immediate statements such as CATALOG. > But it does boot. And, I removed the synthesized clock and just used > !PHI2_6509 and all works, as does PHI1_6509 (as defined by the > datasheet). I also removed the '245 buffer on the data pins, and it Well, congrats on that! Regards, Michau. Message was sent through the cbm-hackers mailing listReceived on 2018-02-28 10:00:03
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