5 Jun
2014
5 Jun
'14
8:54 a.m.
On 6/5/14 7:25 AM, Toby Thain wrote:
Pretty sure all the Mac/Lisa 3.5" drives are
variable speed as well, thanks to the IWM?
400K 3.5 and Mac Twiggy used PWM derived from the sound circuit.
Lisa Twiggy and all other variable-speed drives had dedicated hardware in the drives for
motor speed control.