Posted By
JamesD
on 2013-08-07
06:22:49
|  Re: Z80 GUI: SymbOS
@Litwr
It doesn't mean the system is closed, it just means you didn't do the math
Drives rotate at 300rpm
300 / 60 = 5 revolutions per second
DOS 3.1 and 3.2 have 13 sectors per track
DOS 3.3 has 16 sectors per track
Sectors are 256 bytes
13 * 256 = 3328 bytes per track for DOS 3.1 and DOS 3.2
16 * 256 = 4096 bytes per track for DOS 3.3
5 * 3328 = 16640 bytes per second transfer rate
5 * 4096 = 20480 bytes per second transfer rate
etc...
But it's easy from there if you bothered to read the DOS wiki (which I posted a link to) you would find this:
"DOS's RWTS routine could read or write a track in two revolutions with proper interleaving"
20480 / 2 = 10240 bytes per second
*edit*
That's if you don't have to step the head and I didn't screw up the math operating on too little sleep
|
