Subject: Re: progress
To: None <>
From: Real Artificial Leather-like Brad Grantham <>
List: macbsd-general
Date: 01/07/1994 00:12:37
> Great to hear you made some progress over the holiday season.
> What chip were you referring to when you said the //si uses a new
> chip that Apple does not give out information about?

The IIsi and possibly also the IIvx (and every desktop Mac since
then, if Apple was smart (but we know better than to wish)) use something
called the "ADB microcontroller."  It handles access to the ADB bus,
the real-time clock (seconds since 1904), parameter RAM, and some other
bits.  We don't have docs, and Apple certainly won't give/sell us any
without a non-disclosure agreement or some kind of license.  Since we
want to give the source to MacBSD away, we'd rather just guess.
Fortunately, they also mention that it is a version of the Motorola
68HC05 microcontroller, for which I ordered documentation yesterday.
With some luck, MacBSD will also run (in the same limited fashion as
the CI) on the IIsi and IIvx shortly.

(I apologize if this repeats some of my earlier message.  I wish I
had more sleep and less caffeine.)

		      Brad Grantham,
	      11 0010010000111111011010101 - It's as easy as pie.
			  Ask me about NetBSD/HP-48!
	     Pinniped-O-Rama, discount seal supplies!  Oort, oort!