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Re: Apple II ROMs?
- Subject: Re: Apple II ROMs?
- From: mjmahon@aol.com (Michael J. Mahon)
- Date: 26 Jan 2004 04:37:14 GMT
- Newsgroups: comp.sys.apple2
- Organization: AOL http://www.aol.com
- References: <hMNQb.27070$Wa.269@news-server.bigpond.net.au>
- Xref: archiver1.google.com comp.sys.apple2:2786
RedskullDC wrote:
<snip>
>The BASE64 (and a few other clones) had a function key, that in combinatuion
>with the other keys on the keyboard, produced all of the normal FP BASIC
>commands from the single key-press.
>
>Since there is no room in the monitor to store the routine to do that, it
>employed
>a 2732 ROM whose high address line was attached to a soft-switch in the
>$Cxxx
>space somewhere. (Much like a 32k Apple2C which uses $C028)
>The code in the keyboard read routine in the monitor would bring in the
>other 2k
>bank which housed the extra code, then switch it back out before it exited.
>
>Neat way of expanding some of the monitor routines, or add the mini-assem to
>Autostart for example.
I have a keyboard that generates Applseoft keywords using a function
key, but it does it entirely within the keyboard microcontroller. The
main board is completely unaware of the "macro" keys' existence.
-michael
Check out amazing quality sound for 8-bit Apples on my
Home page: http://members.aol.com/MJMahon/