Previous Thread
Next Thread
Print Thread
Page 15 of 419 1 2 13 14 15 16 17 418 419
Joined: May 2012
Posts: 570
Likes: 12
S
Senior Member
Senior Member
S Offline
Joined: May 2012
Posts: 570
Likes: 12
There's a Lisa teardown over at EEVblog ->

Joined: Mar 2001
Posts: 17,239
Likes: 263
R
Very Senior Member
Very Senior Member
R Offline
Joined: Mar 2001
Posts: 17,239
Likes: 263
I had no idea a Lisa was a handheld game running on a 4-bit microcontroller ;-) No wonder the driver's all wrong!

Joined: Jan 2011
Posts: 266
Likes: 4
Senior Member
Senior Member
Joined: Jan 2011
Posts: 266
Likes: 4
Originally Posted by R. Belmont
I had no idea a Lisa was a handheld game running on a 4-bit microcontroller ;-) No wonder the driver's all wrong!


What is the current setup people are using to dump COP 420's?
I was going to try dumping all the HP-HIL chips. The last one I
did was for Looping back in the 90's. I think I still have the code for talking to a PCI parallel port card that I used.

Joined: Mar 2001
Posts: 17,239
Likes: 263
R
Very Senior Member
Very Senior Member
R Offline
Joined: Mar 2001
Posts: 17,239
Likes: 263
I don't actually know, I remember the Lisa COP 420s being dumped at least 2-3 years ago now but I don't remember who did it.

Joined: Mar 2006
Posts: 1,080
Likes: 7
L
Very Senior Member
Very Senior Member
L Offline
Joined: Mar 2006
Posts: 1,080
Likes: 7
IIRC it was done as a decap and segher figured out the bit order, but there's actually a way to dump cop420s without decap at all, electrically, explained on a natsemi application note.

LN


"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
Joined: Jan 2011
Posts: 266
Likes: 4
Senior Member
Senior Member
Joined: Jan 2011
Posts: 266
Likes: 4
Originally Posted by Lord Nightmare
IIRC it was done as a decap and segher figured out the bit order, but there's actually a way to dump cop420s without decap at all, electrically, explained on a natsemi application note.

LN


yes, that's what I used when I dumped the one on Looping.
I never really followed up if the information got used or was correct.

Joined: May 2010
Posts: 1,051
S
Very Senior Member
Very Senior Member
S Offline
Joined: May 2010
Posts: 1,051
Anyone know the appnote #? I looked through a bunch on bitsavers but didn't come across it. Thanks!

Joined: Mar 2006
Posts: 1,080
Likes: 7
L
Very Senior Member
Very Senior Member
L Offline
Joined: Mar 2006
Posts: 1,080
Likes: 7


"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"
Joined: May 2010
Posts: 1,051
S
Very Senior Member
Very Senior Member
S Offline
Joined: May 2010
Posts: 1,051
Very handy- thanks! It looks very similar to the 3870.

The TI57 patent mentions a test pin, and describes how to dump the TMS1500 ROM. It looks much simpler than the TMS1000/1100! HrastProgrammer mentioned that a friend of his was able to dump the ROM, so I guess there is enough info in the patent. I'll probably still decap one, even though the instruction PLA is likely stock (since his emulator runs the ROM dump) and the output PLA would be easy to figure out.

Joined: Jun 2001
Posts: 530
Likes: 37
O
Senior Member
Senior Member
O Offline
Joined: Jun 2001
Posts: 530
Likes: 37

Page 15 of 419 1 2 13 14 15 16 17 418 419

Link Copied to Clipboard
Who's Online Now
2 members (AJR, Duke), 190 guests, and 0 robots.
Key: Admin, Global Mod, Mod
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Forum Statistics
Forums9
Topics9,331
Posts122,189
Members5,076
Most Online1,283
Dec 21st, 2022
Our Sponsor
These forums are sponsored by Superior Solitaire, an ad-free card game collection for macOS and iOS. Download it today!

Superior Solitaire
Powered by UBB.threads™ PHP Forum Software 8.0.0