Search found 567 matches

by tin
Sat May 15, 2010 12:50 pm
Forum: Prevue Discussion
Topic: Prevue Channel System Disk
Replies: 36
Views: 24958

Re: Prevue Channel System Disk

@swest77 - very good to hear from you I knew AriX was in touch with you and read both the info you put on Wikipedia and the talk page. I want to say thanks for providing the world with information about a system that so many people must have seen, but so few seem to know anything about. Very interes...
by tin
Fri May 14, 2010 11:24 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

BTW new youtube video is called for surely! :)
by tin
Fri May 14, 2010 10:50 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

Example 1: I will change the date and time via the K command. I therefore need to insert these bytes into the buffer:- 55 AA 41 2A 00 94 (training, start marker, asterisk, zero, checksum) 55 AA 4B (training, command 4B "K") 01 04 09 0A 16 27 1E 01 01 9D (monday may 10th 2010 22 hours 39 mi...
by tin
Fri May 14, 2010 10:46 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

I'm not massively clear on the data format as yet...but here are some things I do know. First bit is 55 AA (some training) 41 (come code that means start I think) 2A (a * which means all EPGS perform this command - all or part of the serial number can go here for individual addressing of each or gro...
by tin
Fri May 14, 2010 10:16 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

BTW the data recieving cursor stays flashing, I take it that I have not done something quite right, like there's an end-of-data message missing or something..... I am sure I will learn more in the next few days :)
by tin
Fri May 14, 2010 10:12 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

Looks like it's a string, so I presume it inserts some listings or something :O If so, major congrats/props. However, I was not able to get it to work. What exactly do you mean by $3800? I put in the address 3800, added what you said, and set 00c8 to 13, but nothing seemed to change. Any advice? mm...
by tin
Fri May 14, 2010 7:35 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

Bolt96 wrote:Sorry to ask now but what exactly will this reverse engineering do? It seems like a very complicated process. :?
BTW it's not so much complicated as time consuming, it's been a real interesting excercise though :)
by tin
Fri May 14, 2010 7:33 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

It will tell us the format of the data (or maybe just some of it) that the atari is expecting and will act upon, which will tell us the format to arrange the data we want it to display, which will hopefully lead to figuring out how to send it to a real or emulated atari over serial, and even if we'r...
by tin
Fri May 14, 2010 7:06 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

AriX wrote:
tin wrote:Sounds great! :D I'll give this a try a little later. What does it do? :)
that's the fun :)
by tin
Fri May 14, 2010 4:33 pm
Forum: Prevue Emulation
Topic: Atari EPG jr reverse engineer
Replies: 69
Views: 33486

Re: Atari EPG jr reverse engineer

So. If someone wants to try..... In your emulator, modify the memory at $3800 to 55 AA 41 2A 00 94 55 AA 4B 01 04 09 0A 16 27 1E 01 01 9D and the byte at 00c8 to 13 and resume. Now can anyone work out how to inject that data via the serial port in any emulator?! (edit: oops, the long string, not the...