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> OS Construction > Custom int 21h |
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nkeck72 13 Jun 2015, 20:54
So, have been into the OS for a while now and i've started to wonder if it is possible to create a custom set of int 21h routines so that I don't have to keep calling (for instance) int 10h for individual characters and instead write whole strings stored in RAM?
_________________ It may look hard, but it won't take long if you take it one byte at a time. NOS: www.github.com/nkeck720/nos |
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13 Jun 2015, 20:54 |
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Trinitek 13 Jun 2015, 22:41
http://wiki.osdev.org/Interrupt_Vector_Table
Reprogram the IVT to point interrupt 0x21 to the location in memory where your interrupt code's entry point is. |
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13 Jun 2015, 22:41 |
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nkeck72 14 Jun 2015, 21:50
Thanks! Much appreciated.
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14 Jun 2015, 21:50 |
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