24 Jan
2016
24 Jan
'16
8:05 a.m.
On Sat, 23 Jan 2016, Eric Christopherson wrote:
How did these dumb drives interface with the computer
at a software
level? I'd think a DOS would need to be loaded somehow.
The drives had their DOS in ROM. Keep in mind that the 1541, 1571, etc.
essentially were computers unto themselves with a CPU (6502), ROM and RAM.
The host computer doesn't need to concern itself with what track & sector
the drive is reading from - it just tells the drive "send me <x>"
and the drive is smart enough to do just that.
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.
http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
Some people collect things for a hobby. Geeks collect hobbies.
ScarletDME - The red hot Data Management Environment
A Multi-Value database for the masses, not the classes.
http://scarlet.deltasoft.com - Get it _today_!