Re: How much of a ][ is needed to twitch?

["mdj" <mdj.mdj@gmail.com>]

On Feb 13, 8:03 pm, biel...@terra.es wrote:

> > The only 'example' of the feature ever being utilised on the IIe that
> > I'm aware of (now that I really think about it) is the Videx
> > Ultraterm, which in IIe mode clobbered the built in ROM routines so it
> > could override the native 80 column hardware.
>
> > Matt
>
> Wasn't it that the slot 3 built-in ROM could be en/dis-abled by a
> softswitch in the IIe ?

It's also switchable by softswitch, yes, but the default is to enable
the motherboard ROM, and operating systems prior to ProDOS aren't
aware of the switch.

The Videx's force enable allows it to be the default card in slot 3,
regardless of the state of the softswitch, making it work
transparently with DOS 3.3 and Pascal applications.

Matt