Re: Apple2 disk controller questions

[supertimer@aol.com (Supertimer)]

david@uow.edu.au wrote:

>Here is a table of floppy disk formats I have built up over the years
>(I must add 21MB and 120MB floptical drives and Sony's HiFD drive soon):
>
>
>disk	speed		data rate	trk	sector	trk/hd
>size	rpm	s/rev	kb/s	scheme	kb	cnt*sz	count	KB
>-------------------------------------------------------------------------
-------
>8"	360	0.167	500	FM	41.67	26*128	77/1	260	SSSD
(8)
>8"	360	0.167	500	FM	41.67	26*128	77/2	520	DSSD
(8)
>
>8"	360	0.167	500	MFM	83.33	26*256	77/1	520	SSDD
(9)
>8"	360	0.167	500	MFM	83.33	26*256	77/2	1040	DSDD
(9)
>
>5.25"	300	0.200	250	FM	25.00	8*256	40/1	80	SSSD
>5.25"	300	0.200	250	FM	25.00	8*256	40/2	160	DSSD
>
>5.25"	300	0.200	245	GCR	49.00	16*256	35/1	140	SSDD
(1)
>5.25"	300	0.200	250	MFM	50.00	8*512	40/1	160	SSDD
(3)
>5.25"	300	0.200	250	MFM	50.00	9*512	40/1	180	SSDD
(3)
>5.25"	300	0.200	250	MFM	50.00	8*512	40/2	320	DSDD
(3)
>5.25"	300	0.200	250	MFM	50.00	9*512	40/2	360	DSDD
(3)
>5.25"	300	0.200	250	MFM	50.00	9*512	80/2	720	DSDD
>
>5.25"	360	0.200	300	MFM	50.00	9*512	40/2	360	DSDD
(4)
>5.25"	360	0.200	300	MFM	50.00	9*512	80/2	720	DSDD
>
>5.25"	360	0.167	500	MFM	83.33	15*512	80/2	1200	DSHD
(4)
>
>3.5"	300	0.167	250	MFM	50.00	9*512	80/2	720	DSDD
(5)
>3.5"	300	0.167	250	MFM	50.00	5*1024	80/2	800	DSDD
(2)
>3.5"	var	var	var	GCR	var	var*512	80/2	800
DSDD (7)
>
>3.5"	300	0.167	500	MFM	100.00	18*512	80/2	1440	DSHD
(6)
>3.5"	var	var	var	GCR	var	var*512	80/2	1600
DSHD (A)
>
>3.5"	300	0.167	1000	MFM	200.00	36*512	80/2	2880	DSED
>
>(1)	Apple ][
>(2)	Applix
>(3)	IBM PC
>(4)	IBM PC/AT
>(5)	IBM PS/2 25,30
>(6)	IBM PS/2 > 30
>(7)	Macintosh & Apple //
>(8)	IBM 3740
>(9)	IBM System 34
>(A)	AE 1.6MB drive on Apple //

Wow!  Ok, next question: how does the Amiga fit 880k into a DS/DD 3.5" disk?