Hello,
I am starting to write the driver for a computer. It has a three 8255, one of which has a diagnostics port in its port B. Lectures on this port are done with a LED add-on that displays a the code of the last executed test. I have some skeleton of the driver, but I cannot find the library for the LEDs. I have looked into the IBM6580 Displaywriter as I know it uses them but I am still clueless.
Please, could anybody point me to the right direction?
Thank you in advance!
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Bits Passats
- Posts: 4
- Joined: Mon Dec 23, 2024 11:53 am
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Bits Passats
- Posts: 4
- Joined: Mon Dec 23, 2024 11:53 am
Re: LEDs
Hello again.
At the end I settled with 7-segment LED displays to show the diagnostics of the computer. However, the segments are driven directly, whereas I would be more interested in having an hex display. I imagine a conversion array/table may already exist somewhere around the code, so implementing it may be reinventing the wheel. Does anybody know where could I find such a piece of code?
Thank you in advance!
At the end I settled with 7-segment LED displays to show the diagnostics of the computer. However, the segments are driven directly, whereas I would be more interested in having an hex display. I imagine a conversion array/table may already exist somewhere around the code, so implementing it may be reinventing the wheel. Does anybody know where could I find such a piece of code?
Thank you in advance!
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Bits Passats
- Posts: 4
- Joined: Mon Dec 23, 2024 11:53 am
Datamaster
I have advanced a bit in the development of this system, however I am stuck. I do have lost the capability to add breakpoints when debugging, without them I am completely lost and cannot continue. I am sure it is the result of misconfiguration of the virtual machine, but I don't have enough experience to know where I am failing.
My code is at github.
Please, could you take a look at it?
Thank you in advance!
My code is at github.
Please, could you take a look at it?
Thank you in advance!