2 Oct
2004
2 Oct
'04
2:22 a.m.
--- Bill Sudbrink <wh.sudbrink(a)verizon.net> wrote:
(Use a 470 board for disk interfacing, but)
would then also have to re-do the monitor ROM, as
the boot loader code in the C4P monitor (according
to rumor)
doesn't work anyway.
Actually, the floppy circuit on the 505 is identical
to the 470. Before the 505, all floppy machines had a
470 board. The bank-select jumpers from the ROM will
have to be reconfigured, since either the floppy or
ROM-basic boot section is mapped to 0000H. I think I
have some docs on this on my web site, and would be
willing to help out with advice or instructions.
There is no conflict with the cassette port--it's just
some analog electronics on the same serial port that
the 505 has. In fact, the 540 video board also had a
"cassette port", just the KCS modulation circuitry
that hooked into a regular serial interface.
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