Perfect match. I like this idea of giving 2nd life to older terminal with never parts. Looking forward when this PCB is ready for release. I have three identical terminals seeking 2nd life too - Burroughs TD 830.
Seeking on EBay I’ve encountered a 950 keyboard priced around 85€ + shipping. It might be of your interest despite a bit pricey. I really would like to see the Televideo back in its former glory.
@@JerryWalker001thanks for the reply. Looks like I need to invest in on mcs-48 adapter for my eprom programmer or build the arduino mcs-48 reader I see on the web. I was hoping a simple circuit could test the main functions on the P8049. Love your videos although much is above my knowledge level.😊
@@richardmerifield3263 That is only true for certain recent 8042/49 clones but does not apply to older 8048 devices which should be readable as they do not contain any code protection. Even for devices which are code protected this does not prevent the data lines from functioning when a clock is applied as this would make them useless. A good reader will still return a valid read cycle for protected devices but will not be able to read the actual code.
Perfect match. I like this idea of giving 2nd life to older terminal with never parts. Looking forward when this PCB is ready for release. I have three identical terminals seeking 2nd life too - Burroughs TD 830.
Definitely way more visible on the the YT video. Congrats Jerry! What an adaptation. It is visibly better.
Just love it when things come together like that! Nice fit :)
Looks great! Nice functional setup.
Very nice!
Seeking on EBay I’ve encountered a 950 keyboard priced around 85€ + shipping. It might be of your interest despite a bit pricey. I really would like to see the Televideo back in its former glory.
Oh the cryptic opening… z80 is dead.
I am curious how you determine whether a P8048 pr P8049 is actually faulty? Is there a simple test circuit?
You should be able to read the internal program code.
@@JerryWalker001thanks for the reply. Looks like I need to invest in on mcs-48 adapter for my eprom programmer or build the arduino mcs-48 reader I see on the web. I was hoping a simple circuit could test the main functions on the P8049. Love your videos although much is above my knowledge level.😊
I guess this is not definitive as I understand it is also possible to block the reading of the code from 8049 when originally programmed ?
@@richardmerifield3263 That is only true for certain recent 8042/49 clones but does not apply to older 8048 devices which should be readable as they do not contain any code protection. Even for devices which are code protected this does not prevent the data lines from functioning when a clock is applied as this would make them useless. A good reader will still return a valid read cycle for protected devices but will not be able to read the actual code.
Can I ask what reader is considered a good reader of the MCS-48?