Re: Got myself a Tiger Learning Computer today

[schmidtd <schmidtd@my-deja.com>]

On Sep 2, 1:21 am, BLuRry <brendan.rob...@gmail.com> wrote:
> On Aug 31, 9:32 pm, schmidtd <schmi...@my-deja.com> wrote:
>
>
>
> > On Aug 31, 5:37 pm, BLuRry <brendan.rob...@gmail.com> wrote:
>
> > > On Aug 31, 9:47 am, "bill.mart...@gmail.com" <bill.mart...@gmail.com>
> > > wrote:
>
> > > > On Aug 31, 10:45 pm, "sfahey" <sfa...@a2central.com.remove-trg-this>
> > > > wrote:
>
> > > > >   To: bill.mart...@gmail.com
> > > > >   Re: Re: Got myself a Tiger Learning Computer today
> > > > >   By: bill.mart...@gmail.com to comp.sys.apple2 on Tue Aug 31 2010 03:47 am
>
> > > > >  > The only other one I have seen is the one Ed Eastman brought to KFest
> > > > >  > 2003.  Maybe he has a bit more of a clue on how the beast works and
> > > > >  > can help you out.
>
> > > > > Jay Edwards, not Ed Eastman.
>
> > > > >http://www.gamebits.net/gallery/kfest/2003/source/29.html
>
> > > > > Sean Faheywww.a2central.com
> > > > > bbs.a2central.com
>
> > > > Thanks for correcting me Sean.   My memory is getting a bit hazy these
> > > > days.
>
> > > Can you get to the monitor?  If so, might want to have a look from
> > > c200 to c2ff -- also see if accessing that memory range does any
> > > bankswitching of c800-cfff -- could be some buried treasure in the
> > > rom.
> > > If not, I can send you a short routine to key-in just to blast out a
> > > test message.
>
> > @Sean - I got in touch with Jay, thanks.
>
> > @B - Yep, you get full access to the machine.  Firmware in c200-c2ff
> > is identical to AppleWin's in the same slot.  No telling what the
> > hardware is doing behind the scenes, though.  I forgot to check if
> > c8xx changes on c2xx access... will have to do that another time.
>
> > I keyed in a modified Apple /// grub bootstrapper, just to see if it
> > would recognize incoming serial characters - it did not, based on my
> > assumptions:
> > 0) Port is set to 9600,n,8,1 by default and embedded COM program
> > 1) Standard SSC ACIA hardware addresses in slot 2
> > 2) The serial port is the male DE-9 connector
> > 3) You need a null modem between the TLC and the Real World
>
> I recommend having it blast out the same series of characters over and
> over -- then on the real world side keep adjusting the serial port
> parameters until you get the correct data over the wire.  You could
> probably write a small assembler loop like the following:
>
> loop1 ldy #'A'
> loop2 lda ACIA_STATUS
>          bit #CLEAR TO SEND MASK  (forgot that one off the top of my
> head)
>          beq loop2
> (note: you could replace the polling above with some other function
> that takes 55 cycles to finish, in the case of 115200 baud.  For
> slower speeds, double/triple that, etc)
>          sty ACIA_DATA
>          cpy #'Z'
>          beq loop1
>          bne loop2
>
> Something like that anyway

Yep, perfect - I can muck about with that to see if it's trying to
send anything.  And I'll check with a voltmeter first to see if
anything ends up on the wire in the first place... ;-)