This message is from the T13 list server.
Two words.... BAD DEVICE
This is ONLY going to COST you MAJOR support $ and anyone
who uses it or it gets attached to.
In the PC world I hope the WHQL tests would fail you.
The following ASSUMES you never intend to hook
up INTR (if it was just a bond out error, you will
just have to spin the chip again).
1) Without a INTR how do I do anything but PIO ?
(No DMA, UDMA, etc)
2) Without a INTR, you are saying I am going to
constantly poll while you are doing a seek ?
Gee I guess you don't care at about CPU utilization ?
For what: Saving one pin... gee what about the other 30
signals... -
Let me count the ways we can BREAK this interface:
1) If you only wanted to do PIO, why not get rid of IORDY ?
Just don't try and stretch the cycle (your not using IORDY
for PIO are you -:)
Hey you can still do MWDMA
2) And since you don't want to support DMA, I assume you did
not include DMARQ, DMACK (That's 2 more PINS)
3) Reset: Never hang and do a good power on reset... -:)
That is another PIN
4) Take off CSEL and the MS/SL jumper and answer for both
the Master and Slave position... and if you do that
you don't need the DASP signal (cause you don't care
if there is a Slave drive or not -:)
That's two more PINS
This tongue-n-cheek message is from:
Jeff
Jeff Wolford Email: [EMAIL PROTECTED]
Senior Storage Architect
Storage Interface and Tools - PC Storage Group
Voice: (281) 514-9465, Pager: (800) 973-5739
Compaq Computer Corporation
> -----Original Message-----
> From: liman Munandar [mailto:[EMAIL PROTECTED]]
> Sent: Monday, January 21, 2002 5:53 PM
> To: [EMAIL PROTECTED]
> Subject: [t13] INTRQ
>
>
> This message is from the T13 list server.
>
>
> Dear T13:
>
> Does anyone know where I can get more info on the use of the
> interrupt? The
> question I have is whether the INTRQ pin is optional or not.
> I have a design
> using a chip with ATA/ATAPI interface. The INTRQ pin was left
> open. I wonder
> if this is ok. Can an ATA/ATAPI device operate without any interrupt
> service?
>
> Thank you in advance.
>
> Regards,
>
> Liman Munandar
> Associate Engineer
> Dura Micro
>
>
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