25 May
2020
25 May
'20
3:12 p.m.
On Mon, May 25, 2020 at 02:27:26PM +1000, Warren Toomey wrote:
Next question, is it possible to do 16-bit division when the hardware
can only do 8-bit divided by 8-bit. Ditto 16-bit modulo with only 8-bit
modulo?
I believe so.
I've seen code for a 68000 to do division of 32 bit values when the chip
only provides for division of 16 bit values. So the same approach should
apply for extending an 8 bit divide to provide 16 bit division.
The book I have this in attributes the algorith to a Dr. Arthur Norman.
See
https://archive.org/stream/Programming_The_M68000_1983_Adn-Wesley_Publishin…
Section 5.8 & 5.9, page 99 in the actual printed book.
DF