View allAll Photos Tagged sdk
OO-SDK Boeing 737-229C (20916) Sabena Belgian World Airlines - Landing London Heathrow Airport around 1992/1993
This is my Intel SDK-80 board before restoration - it had really been hacked around over the years, and from the various additional components and mods, it appeared to have been used for several projects. Fortunately, the PCB itself is in reasonably good condition, with no corrosion evident. Note the hacked bus buffer sockets - with think wire links jammed into them, they were a write-off.
Fortunately, there was not too much old junk in the user expansion area, though what was there was in generally poor condition. Note the really old LEDs - the white-expoy HP one with the metal band was not working until I zapped it with a higher voltage; it was not worth saving.
Also note the nice white ceramic zebra-striped 8205 decoders; along with the RAM and odd other chips, these were really the only decent chips on the board. The CPU had two end pins badly bent out at 90 degrees from the socket, and the 93S16 chip had no markings, as well as being in the wrong socket. Several other smaller chips had bent and dirty pins; the board would not have worked as supplied. The dodgy-looking 8255 PIA appears to be a factory reject, as it fails the register-level test I developed for this board.
The 47R resistor immediately under the right hand PIA socket has been badly overloaded at some stage - it connects between 12V and some pins on the serial connector - if shorted to ground, it would dissipate 3W, which explains why it is rather burnt, as it is only a 0.25W device.