On Sep 2, 8:56 pm, schmidtd<schmi...@my-deja.com> wrote:
On Sep 2, 7:28 am, schmidtd<schmi...@my-deja.com> wrote:
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... ;-)
I'm not convinced the serial port is viable on my machine. I get the
normal status out of the status register when nothing's attached, but
when I hook up the other side via a null modem, the status doesn't
change (at all) the way other SSC machines do. So, lots of tweaks to
the configuration registers later, I still don't have anything coming
out the wire.
I pulled the top off the machine - lots of custom logic (and trace
wires...), but no big juicy 6551 to replace. :-(
Anything that resembles traces to a tape or joystick port?