#2 C128+VDC+SwiftLink+ppp = machine lockup

[Maciej Witkowiak]

There are (almost) random lockups of my C128 when using
ppp connection. I have IRQ LED indicator and it is off, so
I can only guess that either IRQs are disabled or NMI causes
it.

[Maciej Witkowiak]

forgot to mention that 2MHz are ofcourse ON. Another bug is
that swiftlink driver don't use RTS/CTS signals, AFAIK

[Maciej Witkowiak]

more info:
2MHz seems to have nothing to do with it, ppp works in lower
speeds (<9600) but sooner or later it will lock, I think that swiftlink driver is the cause.
Partially it was because the other end is an old ISA MultiIO
card with 8255 and not FIFO64 ACIA.
Yet another issue here is that drive access will cause machine to lock-up (just like with network accesses) if other side RS232 (PC) is uninitialized i.e. for ppp I must start pppd during loading ppp driver on C= side.