68kMLA Classic Interface
This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.
| Click here to select a new forum. | |
| First pictures of the inside of a Mac Plus HAL | |
Posted by: al kossow on 2023-03-30 19:40:56
bitsavers (@bitsavers@oldbytes.space)Attached: 3 images First pictures of the inside of a Mac Plus 341-0514-A 16R8 HAL taken by Travis Goodspeed The green marks point to the chip connections that replace the programmed fuses of a PAL This may be the first time anyone has taken a picture of a HAL "HAL - Hard Array Logic The HAL...
| |
| Posted by: al kossow on 2023-04-01 12:08:22 some progress bitsavers (@bitsavers@oldbytes.space)Some progress on reverse engineering mac plus PALs Travis has decapped and read the bits out of the 341-0522-A It wasn't at all what I expected. It is a work-alike 24 pin part bonded out to 20. The array is much more complicated than the simple fuse-link parts. Investigations continue. Trying to...
| |
| 1 |