Re: An idea that might go nowhere - ProDOS + CC65 = :>?

[ol.sc@web.de (Oliver Schmidt)]

Hi Steve,

>BLuRry wrote:
>> Why not just interrogate the standard text entry buffer at
>> 0x0200-0x02ff?  Might be able to use it as a dual-purpose command
>> buffer for manual or script entry that way.

>I'd have to rewrite part of the libc.

Rather the opposite...

I presume you already checked out this:
http://www.cc65.org/doc/apple2-9.html#ss9.1

The argument passing method described there means for the cc65 C
library picking up the arguments from the keyboard buffer. So if you
create a shell that puts arguments intended for a cc65 program into
the keyboard buffer "in the right way" then this *THE* way to get
along without any modification on the cc65 side of things.

"The right way" is quite simple:

- Place $B2 at $200
- Place the arguments at $201 with hibit clear
- Place $00 behind the arguments

You don't have the whole kayboard buffer to do that because cc65
programs expect the their path to be present at $280 (lenght at $280,
content at $281) as done by BASIC.SYSTEM. This ends up as argv[0].

If you have issues, just download the cc65 sources and check out
libsrc/apple2/mainargs.s to view the parsing code.

Regards,
Oliver