Hugo Holden
Veteran Member
I have attached a photo of the personality module I found in the SOL-20 I am restoring.
I have found all kinds of issues on the motherboard so far such as IC's with missing pins(including the CPU) and corrosion and socket issues, so I think the computer was not working recently and various IC's were pulled and re-fitted poorly. I'm working through all this before I'm game to power it.
In the meantime I am concerned about the ROM module:
One of the IC pins on U2 wasn't in the socket hole it was bent over so not connected! Also I am wondering if the IC array has been plugged in out of order,or not.
The ROMs had a small paper sticker on the window, except one sticker was totally missing on U2. This worried me so I put light occlusive foil over all of them to help reduce the total light exposure from now at least, and transferred the label markings that were on the original paper stickers onto these new aluminium stickers. But the labels look out of order with respect to the U1 to U-4 socket labels.
So the first question is, does this look right or not or is it likely the roms are in the wrong sockets ?
Secondly, does anybody know how I can contact Mr. Martin Eberhard ? I want to buy his MM5204Q programmer kit, it is looking like I might need one.
I have found all kinds of issues on the motherboard so far such as IC's with missing pins(including the CPU) and corrosion and socket issues, so I think the computer was not working recently and various IC's were pulled and re-fitted poorly. I'm working through all this before I'm game to power it.
In the meantime I am concerned about the ROM module:
One of the IC pins on U2 wasn't in the socket hole it was bent over so not connected! Also I am wondering if the IC array has been plugged in out of order,or not.
The ROMs had a small paper sticker on the window, except one sticker was totally missing on U2. This worried me so I put light occlusive foil over all of them to help reduce the total light exposure from now at least, and transferred the label markings that were on the original paper stickers onto these new aluminium stickers. But the labels look out of order with respect to the U1 to U-4 socket labels.
So the first question is, does this look right or not or is it likely the roms are in the wrong sockets ?
Secondly, does anybody know how I can contact Mr. Martin Eberhard ? I want to buy his MM5204Q programmer kit, it is looking like I might need one.