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#c16

1 post1 participant0 posts today
Home Computer
Public

DE MENOR A MAYOR 😍😎🕹

Mi primer computadora, allá por 1986, fue una Commodore 16. Luego de un tiempo, la vendí para comprar una Commodore 128 usada. Cuando empecé a coleccionar home computers, en 1999, recién pude conseguir ese eslabón faltante: la Commodore 64.

La alegría inmensa de hacer realidad ese sueño de pibe un día llegó. Tener las tres, una al lado de la otra, completas y funcionando: C16, C64 y C128.

#c16#c64#c128
John Small
Public

… now that it’s working, why not upgrading it from 16kilobyte to 64KB of Memory!?
so out with the old, in with the new :)
but first I made an intermediate step to only change it to 32KB, because to make the whole thing work it needs two bodge-wires added, so I tested it after adding the first wire :)
the 74 IC on the left had to be removed because the change to be made is in the middle under that IC!

This happened between Tuesday and Saturday. 🤷🏻‍♀️

John Small
Public

… after some scoping it turned out the CPU wasn’t working, after replacing it, and also placing a Diag-ROM into the socket the computer showed signs of life.
with the regular Kernal-ROM still no Keyboard life, that’s because the PLA did noch select the appropriate IC to read from the keyboard, everything else seemed to work.
The PLA has been replaced by a modern part, what I already had in stock.

John Small
Public

A new toy showed up at my door step the other day,
but it did not work also did not come with an original PSU so I had to use an alternative one, and that’s probably the issue the fuse was blown as new PSUs have center positive connectors, 40 year old computer has it center negative 🤷
an adapter has been built, but no luck of getting an operational C16, just a black screen!
📺⌨️