Re: Prodos Woes

["Bill Garber" <willy46pa@comcast.net>]

"Charlie" <charlied@NOSPAMbboard.com> wrote in message
brihfk04vs@enews3.newsguy.com">news:brihfk04vs@enews3.newsguy.com...
:
: "Bill Garber" <willy46pa@comcast.net> wrote in message
: b9OdnYNUcbSxNUGi4p2dnA@comcast.com">news:b9OdnYNUcbSxNUGi4p2dnA@comcast.com...
: >
: > Ok, first, I think you need to define your memory location
: > as A$xxxx as HEX. You should anyway.
:
: In ProDOS it doesn't matter, you can use hex or decimal.

Interesting. However, if you are going to program in
assembler, wouldn't it be wise to continue to think
in terms of hex?

: > Also, on a BLOAD the
: > file that you have previously BSAVE'd will contain a few
bytes
: > header with the location to be BLOAD'd into.
:
: In ProDOS the bytes you are talking about are not stored in the
file (they are
: in DOS 3.3).

Ok, then how does it know to BLOAD at the same location
that I assigned when I BSAVE'd the file without specifying
one?

: > No need to define this location on a BLOAD.
:
: True, unless you want to BLOAD to a different location.

This is also interesting. Now I know I can BSAVE a memory
block and BLOAD it in another area. Cool!

: There is a seldom used "page 2" of text, starting at $800 and
ending at $BFF. I
: believe accessing $C055 (49237) turns on page 2.  On a IIgs I
believe you have
: to have the "Alternate Display Mode" turned on for this to
work.

Nice. So I can load up a Page1, show it, and while working in
Page1
load up a Page2 and switch, then load a new Page1 and switch
again?

: It is not always the fault of the emulator when something
doesn't work, but the
: image that we are trying to run on it.  Most disk images don't
contain all the
: information that the original disk had.

For sure. I've downloaded many a disk image that had missing
data or program files, or have had files moved into or out of
folders and hence original systems can't find them.

: > I agree wholeheartedly. Apple IIs are fun though.
:
: They sure are.

At first they weren't, but the more I know the more I want
to learn and the more fun I have. ;-)

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy4SPAM6pa@comXcast.net
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