20 Aug
2006
20 Aug
'06
9:37 p.m.
On 8/20/2006 at 9:08 PM dwight elvey wrote:
The part is used on a floppy controller for hard
sectored double density
floppies. It is a little unusual but that is what it is used for.
Not that unusual! I've used a 2651 USART on a floppy controller. Used a
9914 data separator and the USART handshaking lines for drive control.
Worked just fine. Wasn't terribly hard to program either.
IIRC, some of the USRTs will not include SYN characters in the CRC (if it
computes one for you), so you may have use a bit of software for your CRCs.
Where the USRT shines is in detecting the bit pattern (address mark) that
signifies the start of a sector.
Cheers,
Chuck