On Sep 2, 6:28*am, schmidtd <schmi...@my-deja.com> wrote:
> On Sep 2, 1:21*am, BLuRry <brendan.rob...@gmail.com> wrote:
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> > On Aug 31, 9:32*pm, schmidtd <schmi...@my-deja.com> wrote:
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> > > On Aug 31, 5:37*pm, BLuRry <brendan.rob...@gmail.com> wrote:
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> > > > On Aug 31, 9:47*am, "bill.mart...@gmail.com" <bill.mart...@gmail.com>
> > > > wrote:
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> > > > > On Aug 31, 10:45*pm, "sfahey" <sfa...@a2central.com.remove-trg-this>
> > > > > wrote:
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> > > > > > * 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 312010 03:47 am
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> > > > > > *> 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.
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> > > > > > Jay Edwards, not Ed Eastman.
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> > > > > >http://www.gamebits.net/gallery/kfes...source/29.html
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> > > > > > Sean Faheywww.a2central.com
> > > > > > bbs.a2central.com
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> > > > > Thanks for correcting me Sean. * My memory is getting a bit hazy these
> > > > > days.
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> > > > 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.
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> > > @Sean - I got in touch with Jay, thanks.
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> > > @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.
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> > > 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
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> > 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... ;-)
Volt meter? :-) You can see the voltage reading bounce around on the
RX pin when there's data coming over. If anything, it's the best
thing to check that you're not going to blow a serial port elsewhere.
-B