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GeneralRe: Smoke and/or drink? Pin
Sander Rossel14-May-16 6:04
professionalSander Rossel14-May-16 6:04 
GeneralRe: Smoke and/or drink? Pin
PIEBALDconsult14-May-16 6:01
mvePIEBALDconsult14-May-16 6:01 
GeneralRe: Smoke and/or drink? Pin
Eddy Vluggen14-May-16 8:33
professionalEddy Vluggen14-May-16 8:33 
GeneralRe: Smoke and/or drink? Pin
RedDk15-May-16 8:19
RedDk15-May-16 8:19 
GeneralRe: Smoke and/or drink? Pin
H.Brydon15-May-16 10:08
professionalH.Brydon15-May-16 10:08 
GeneralStill no sleep Pin
CDP180213-May-16 14:22
CDP180213-May-16 14:22 
GeneralRe: Still no sleep Pin
Ron Anders13-May-16 17:44
Ron Anders13-May-16 17:44 
GeneralRe: Still no sleep Pin
CDP180214-May-16 0:37
CDP180214-May-16 0:37 
The graphics chip, the CDP1861, is out of production since the early 1980s. All the other parts are still in production and available as SMD, so I could save a lot of space. Space is not much of a problem, but manually soldering is. All parts are CMOS (the 74LSXX logic ICs are actually going to be 74HCTXX), so I prefer to have sockets in case I zap one. Also, this way I can first test the board with empty sockets and then add the ICs group by group and measure the signals.

This is my plan:
- Check the entire schematic for logical errors. Twice, better three times.
- Order the board and parts
- Assemble the board, still leaving the sockets empty.
- Check the voltages and look for shorts.
- Add the logic ICs, now we should have a clean clock signal.
- Add the processor and the EPROM with a small test program to blink the LED.
- Add the RAMs and expand the test routine in the EPROM with a memory check.
- Add the graphics chip and expand the test routine to put something on the screen.
- Add the IO port and test the communication with the host computer.
- From here on it's just a matter of developing the software in the EPROM, so that the host can comfortably send graphics commands over the IO port and leave all the dirty work to the processor on this graphics card.

35 years ago I would have commited serious crimes to get my hands on something like this. Smile | :)
The language is JavaScript. that of Mordor, which I will not utter here

This is Javascript. If you put big wheels and a racing stripe on a golf cart, it's still a f***ing golf cart.

"I don't know, extraterrestrial?"
"You mean like from space?"
"No, from Canada."

If software development were a circus, we would all be the clowns.

GeneralRe: Still no sleep Pin
Roger Wright14-May-16 3:39
professionalRoger Wright14-May-16 3:39 
GeneralRe: Still no sleep Pin
CDP180214-May-16 6:28
CDP180214-May-16 6:28 
GeneralRe: Still no sleep Pin
OriginalGriff13-May-16 19:55
mveOriginalGriff13-May-16 19:55 
GeneralRe: Still no sleep Pin
CDP180214-May-16 0:42
CDP180214-May-16 0:42 
GeneralRe: Still no sleep Pin
RTek2314-May-16 4:00
professionalRTek2314-May-16 4:00 
GeneralRe: Still no sleep Pin
CDP180214-May-16 6:47
CDP180214-May-16 6:47 
GeneralPasting Code Into CP Pin
Kevin Marois13-May-16 7:53
professionalKevin Marois13-May-16 7:53 
GeneralRe: Pasting Code Into CP Pin
OriginalGriff13-May-16 8:02
mveOriginalGriff13-May-16 8:02 
GeneralRe: Pasting Code Into CP Pin
Kevin Marois13-May-16 8:04
professionalKevin Marois13-May-16 8:04 
GeneralRe: Pasting Code Into CP Pin
OriginalGriff13-May-16 8:15
mveOriginalGriff13-May-16 8:15 
GeneralRe: Pasting Code Into CP Pin
Brisingr Aerowing13-May-16 14:43
professionalBrisingr Aerowing13-May-16 14:43 
Joke"Friday The 13th".. Pin
Eytukan13-May-16 7:10
Eytukan13-May-16 7:10 
GeneralRe: "Friday The 13th".. Pin
Patrice T13-May-16 10:34
mvePatrice T13-May-16 10:34 
GeneralRe: "Friday The 13th".. Pin
Sander Rossel13-May-16 11:31
professionalSander Rossel13-May-16 11:31 
GeneralRe: "Friday The 13th".. Pin
908236513-May-16 12:53
908236513-May-16 12:53 
GeneralRe: "Friday The 13th".. Pin
Sander Rossel13-May-16 14:30
professionalSander Rossel13-May-16 14:30 
GeneralRe: "Friday The 13th".. Pin
908236514-May-16 1:17
908236514-May-16 1:17 

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