Marko Mäkelä [mailto:msmakela@cc.hut.fi]wrote:
>
> On Wed, 5 Sep 2001, Christopher Phillips wrote:
>
> > I've currently got my c64 linked to my mac via a swiftlink cartridge
> > and a USB to serial adaptor.
>
> It seems that I've lost a prospective customer. :-) I'm developing a
> device that ... plugs into the cassette port
> of almost any 8-bit Commodore (e.g. the SX-64 doesn't have a cassette
> port).
Not necessarily; my big objection to resorting to swiftlink was
that it displaces my Action Replay, which makes development
much harder than it would otherwise be. (prior to standard serial,
which I didn't have all the right cables and adaptors for before
last night, I considered transfering via MIDI, but my c64 MIDI
cart failed, and by video capture, but my composite to DV
adaptor doesn't like the c64 video signal!)
> I also read that newer Macs don't come with RS-232 any more.
> Christopher, how hard is it to use that USB-RS232 converter?
> Or is there a standard serial line library interface on the Mac?
yup; the OS supplies a communications toolbox. The USB drivers
just add named ports to complement the original Modem and Printer
ports if you have them. Actually, the pod I have contains
two ports, one of which supports some additional capabilities
so it can emulate the original mac Printer port, so I have a
choice between Modem (which reaches the internal modem),
Printer (port 1 on the pod) and USA28x#2 (port2 on the pod).
I'm actually using a terminal program that pre-dates the USB
macintoshes for my XModem transfers, and it has no clue that
USB is involved at all. Quite odd typing on my mac and
seeing 80-column text on my c64 :-) I might have
to start using my c64 for serial debug printfs...
>
> Currently I'm writing AVR assembler part of the software. The first
> function I'm implementing is the measurement of pulse widths on the
> cassette write line. Emulating the low-level cassette read and write
> protocol will be next in the line. Once that stuff works,
> I'll implement
> something prlink-like that would provide an alternative
> solution to your
> problem.
>
Cool. As I have spent the last four or five years meaning to get
around to this, you may yet have that working before I manage
an alternative.
Christopher.
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