Search found 502 matches

by Kakemoms
Thu Jan 18, 2018 3:34 pm
Forum: Hardware and Tech
Topic: 6561 Die Shot Reversing Explorations
Replies: 145
Views: 2750

Re: 6561 Die Shot Reversing Explorations

Well, it didn't 'wet' my cutting disks, it reduced them to splinters in the blink of an eye. Good thing I was wearing eye protection! When looking at the seam material on the edge of the metal cover on my 6567R5, it doesn't look like solder as it did with the Pentium 75. It looks like a mixture of ...
by Kakemoms
Wed Jan 17, 2018 10:45 pm
Forum: Hardware and Tech
Topic: 6561 Die Shot Reversing Explorations
Replies: 145
Views: 2750

Re: 6561 Die Shot Reversing Explorations

Hot air gun. The cover is soldered in place. Brad Can somebody tell me what is required to make a clean cut through which won't damage the die ? And preferably not destroy my cutting tool... I do have a very good hot air gun which will liquify tin-lead solder. Its not tin-lead, that would not work ...
by Kakemoms
Wed Jan 17, 2018 2:21 pm
Forum: Other Systems
Topic: Strange-looking C64
Replies: 4
Views: 102

Strange-looking C64

Looks like a C64C or something, but with a different case:

C64-case.jpg

On ebay here

Anyone knows were this case came from?
by Kakemoms
Wed Jan 17, 2018 3:50 am
Forum: Hardware and Tech
Topic: VIC - why 22 Columns?
Replies: 13
Views: 208

Re: VIC - why 22 Columns?

You can also read more about how the Atari 400 (and its predecessor Atari 2600) solved the video buffering here . Basically the Atari 400 required two IC's to be able to both display video (CTIA chip) and feed the videochip memory from a framebuffer (ANTIC chip). Both the Vic-I and Vic-II does this ...
by Kakemoms
Tue Jan 16, 2018 10:38 am
Forum: Hardware and Tech
Topic: VIC - why 22 Columns?
Replies: 13
Views: 208

Re: VIC - why 22 Columns?

I don't see your point. Other home-computers like Atari 400 and TI-99/4 used 40 columns on TV in the year 1979. If I remember right the VIC I with its 22 columns was developed in the same year. Best regards, Schnurri The 6560 Vic-I chip was developed in 1976-77, and based on a 5um Nmos process. Lat...
by Kakemoms
Tue Jan 16, 2018 7:23 am
Forum: Hardware and Tech
Topic: VIC - why 22 Columns?
Replies: 13
Views: 208

Re: VIC - why 22 Columns?

Well, you can change it to 20 or 28. If you have an adjustable monitor I think you can get it up to around 32 columns before it starts looking strange. 20 columns would be 160 pixel which is half of 320 and quarter of 640, which eventually became the VGA standard. At the time of the Vic-20 there was...
by Kakemoms
Sat Jan 13, 2018 5:39 am
Forum: Hardware and Tech
Topic: SuperCPU for the Vic-20
Replies: 88
Views: 4631

Re: SuperCPU for the Vic-20

Some very good news: :mrgreen: :mrgreen: :mrgreen: The lattice representative has confirmed that they have sent me 10 sample of the Mach XO3-9400-C which (probably) constitutes a new packaging which supposedly fixes the thermal problem they initially had. I will run thermal tests to confirm this. Th...
by Kakemoms
Thu Jan 11, 2018 1:11 am
Forum: Hardware and Tech
Topic: 6561 Die Shot Reversing Explorations
Replies: 145
Views: 2750

Re: 6561 Die Shot Reversing Explorations

Do you know what would really help with the 6560 image? If there was some way of combining the 3D nature of the electron microscope image with the optical image. So a coloured 3D terrain. That would make the transistors stand out a bit more. Not sure how we'd go about combining the images in that w...
by Kakemoms
Tue Jan 09, 2018 5:58 am
Forum: Hardware and Tech
Topic: Introducing VFLI for VIC-20: 208x256 pixels in 16 colours!
Replies: 104
Views: 36035

Re: Introducing VFLI for VIC-20: 208x256 pixels in 16 colours!

Wow! Thats a really great picture.. maybe I need to modify one of my 5 Vic's.. :roll:
by Kakemoms
Tue Jan 09, 2018 5:22 am
Forum: Hardware and Tech
Topic: 6561 Die Shot Reversing Explorations
Replies: 145
Views: 2750

Re: 6561 Die Shot Reversing Explorations

Ok. Here is a couple of samples with 200X nominal optical magnification: SNAP-120840-0047.jpg SNAP-120936-0051.jpg The extra cleaning in acid has stripped some metal here and there, but not enough to make a difference (you can still see were the edges have been). The color in the picture is very dep...
by Kakemoms
Mon Jan 08, 2018 3:00 am
Forum: Hardware and Tech
Topic: 6561 Die Shot Reversing Explorations
Replies: 145
Views: 2750

Re: 6561 Die Shot Reversing Explorations

Here is a snapshot of one of the corners. As I expected, you don't see any color were there is metal.

SNAP-095928-0028.jpg


It requires about 25 pictures to cover the whole chip at this resolution.

I think the best way is to remove the metal & oxide.
by Kakemoms
Sun Jan 07, 2018 2:40 pm
Forum: Hardware and Tech
Topic: 6561 Die Shot Reversing Explorations
Replies: 145
Views: 2750

Re: 6561 Die Shot Reversing Explorations

Just to sport the infrared idea I'm wondering what kind of movie you'd get if you'd heat the chip up very slowly. Well, not much would happend until you melt Aluminium at 660C. Since the buried doped layers are not visible until one strips away the top metal and oxide, you wouldn't see the change i...
by Kakemoms
Sun Jan 07, 2018 2:35 pm
Forum: Hardware and Tech
Topic: 6561 Die Shot Reversing Explorations
Replies: 145
Views: 2750

Re: 6561 Die Shot Reversing Explorations

Ok. I think what is confusing me is that you draw the diffusion areas as contineous green areas even beneath the polysilicon. I've been thinking more about this and suspect that before it can be useful to someone else, I'll have to go back through the SVG that I've been slowly putting together in I...
by Kakemoms
Sun Jan 07, 2018 5:43 am
Forum: Hardware and Tech
Topic: 6561 Die Shot Reversing Explorations
Replies: 145
Views: 2750

Re: 6561 Die Shot Reversing Explorations

Would certainly be worth trying optical. In the 6561 image, the detail can still be seen under the metal, but its much less clear Probably not strictly required, but would certainly be nice. In most cases I can make out what is under the metal in the 6561 images, but not having the metal there in a...

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