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Re: Command(s) to read in Apple II ROM + save to disk? [message #395573 is a reply to message #395567] Tue, 09 June 2020 00:26 Go to previous messageGo to next message
sicklittlemonkey is currently offline  sicklittlemonkey
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On Tuesday, 9 June 2020 08:05:50 UTC+10, schmidtd wrote:
> On 6/8/20 5:22 PM, Antoine Vignau wrote:
>> No thanks, David!
>
> Any time. The only other slot with non-floating RAM is slot 3, so I
> dumped that too.

Yeah, that was already captured in the C100-FFFF dump.
(Probably why Geoff only asked for the slot 2 ROM.)

The slot 2 ROM is byte identical to the SSC ROM. (The garbage at CE00 is where the SSC has the code which maps to C200.)

What about the software? Is that easy to get from the carts?
Or does it need "speakering" out?

Cheers,
Nick.
Re: Command(s) to read in Apple II ROM + save to disk? [message #395574 is a reply to message #395573] Tue, 09 June 2020 01:50 Go to previous messageGo to next message
gbody4 is currently offline  gbody4
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Thanks David for the slot 2 dump.
I have compared the C800-CEFF range with the SSC ROM and the contents are the same.
What I have noticed there is no second crystal in any of the known photos, just the 28.6363 master clock.

Regards
Geoff Body
Re: Command(s) to read in Apple II ROM + save to disk? [message #395575 is a reply to message #395573] Tue, 09 June 2020 02:14 Go to previous messageGo to next message
David Schmidt is currently offline  David Schmidt
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On 6/9/20 12:26 AM, Nick Westgate wrote:
> On Tuesday, 9 June 2020 08:05:50 UTC+10, schmidtd wrote:
>> On 6/8/20 5:22 PM, Antoine Vignau wrote:
>>> No thanks, David!
>>
>> Any time. The only other slot with non-floating RAM is slot 3, so I
>> dumped that too.
>
> Yeah, that was already captured in the C100-FFFF dump.
> (Probably why Geoff only asked for the slot 2 ROM.)
>
> The slot 2 ROM is byte identical to the SSC ROM. (The garbage at CE00 is where the SSC has the code which maps to C200.)
>
> What about the software? Is that easy to get from the carts?
> Or does it need "speakering" out?

Well, that's where my story started all those years ago. I was
interested in ADTPro'ing the cartridge contents out into the real world.
They're ProDOS entities in slot 6, drives 1 and 2 - so it would be
awesome to dump them one by one. But comms software into the machine is
proving difficult - and bi-directional I/O is the heart of the matter.

I know I could write a utility to blast a length followed by a set of
blocks via audio out, but that would be a depressingly long program to
type on that keyboard. We haven't talked about that keyboard yet... it
is a hellscape of horrific proportions. If this machine ever made it
out into the mainstream, the keyboard would be its undoing. It simply
can't handle keypresses more frequent than the laziest hunt-and-peck
typist. It's maddening. I literally stick out one finger and use it to
type to keep from dropping characters. And I end up dropping them
anyway for two consecutive 00's. Don't be jealous you don't have one of
these, y'all. They suck.
Re: Command(s) to read in Apple II ROM + save to disk? [message #395576 is a reply to message #395556] Tue, 09 June 2020 02:20 Go to previous message
David Schmidt is currently offline  David Schmidt
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On 6/8/20 7:26 AM, geoff body wrote:
> Those that have been looking a the TLC would have come across the photo of a prototype. You notice in the photo that the two emproms go to pads for two chips. I would think they dies would be mount on PCBs to reduce the size of the footprint compared to the standard layout of the chips. You can zoom in very nicely with the photo
>
> If I had access I would trace out pins 9-12 of both ADM202JN chips with respect U15. I am guessing is a ACIA 6551, this would possibly allow pin positions so the transmit clock could be checked/located.
>
> https://onlineonly.christies.com/s/first-bytes-iconic-techno logy-twentieth-century/prototype-tiger-learning-computer-9/8 95

I took some snaps of the innards of my machine - it differs somewhat
from the prototype you reference. Take a look at these:
https://github.com/david-schmidt/tlc-apple2/blob/master/doc/ images/Open2.jpg
https://github.com/david-schmidt/tlc-apple2/blob/master/doc/ images/Open3.jpg
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