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Re: The ATA is ignoring my driver

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[
 With the 'posting etiquette' discussion in other threads/groups
 I'm sorry for the top post.  Outlook Express doesn't add the
 '>' to some replies. :-)
]

Just a quick question.  Are you reading the Status byte or the
Alternate Status byte when checking for a 'done' state?  You should
only read the Status byte after an IRQ, while reading the Alternate
Status byte any other time.

Just curious.

Ben

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"Isaac D. Cohen" <8switchsoftware@gmail.com> wrote in message 
news:834280f5-9052-4ec9-aea3-0fd35b384507@googlegroups.com...
Hi,

I have a strange problem with my ATA driver. After resetting the drive I 
send the command to get the identification block and it fires an IRQ (as it 
is supposed to). But when I'm done reading the block through port 0x170, and 
the DRQ bit is clear, no IRQ comes. I can read from the ATA device, but no 
IRQs will fire. I have to figure out when it's ready by polling. If I try 
reading the identification block again, no IRQ will fire even right after 
sending the command before reading the data (it does the first time). In 
other words, after that first IRQ, the drive will no longer send IRQs.

With ATAPI the problem gets even stranger. The first part is the same. An 
IRQ fires when I send the command to get the identification block, but no 
IRQ fires when I finish reading it. But when I try to read using the packet 
interface, things get worse. I send the command to send a packet (0xA0) and 
it doesn't send an IRQ, but at least it sets DRQ. However, once I send the 
packet the drive completely ignores me. No IRQ fires, DRQ is clear, and 
nothing happens. I'm not sure if these two problems (i.e. no IRQs and ATAPI 
doing nothing) are interrelated, but I'd appreciate if anyone can point out 
what may be causing either problem.

I'm using bochs, so the problem is obviously in my code. But I'm not sure 
where in my code, and there would be a lot to post if I posted it all, so if 
you want to see a certain part let me know and I can post it.

Thank you very much,
Isaac D. Cohen

"Legitimate use of violence can only be that which is required in 
self-defense."  - Ron Paul 

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Thread

The ATA is ignoring my driver "Isaac D. Cohen" <8switchsoftware@gmail.com> - 2016-03-01 14:29 -0800
  Re: The ATA is ignoring my driver "Benjamin David Lunt" <zfysz@fysnet.net> - 2016-03-01 16:45 -0700
  Re: The ATA is ignoring my driver "Isaac D. Cohen" <8switchsoftware@gmail.com> - 2016-03-01 19:40 -0800
    Re: The ATA is ignoring my driver "Benjamin David Lunt" <zfysz@fysnet.net> - 2016-03-01 23:41 -0700
  Re: The ATA is ignoring my driver "Isaac D. Cohen" <8switchsoftware@gmail.com> - 2016-03-02 21:21 -0800
    Re: The ATA is ignoring my driver "Benjamin David Lunt" <zfysz@fysnet.net> - 2016-03-03 12:15 -0700
  Re: The ATA is ignoring my driver "Isaac D. Cohen" <8switchsoftware@gmail.com> - 2016-03-06 18:45 -0800
    Re: The ATA is ignoring my driver "Benjamin David Lunt" <zfysz@fysnet.net> - 2016-03-07 08:07 -0700
  Re: The ATA is ignoring my driver "Isaac D. Cohen" <8switchsoftware@gmail.com> - 2016-03-07 10:35 -0800
    Re: The ATA is ignoring my driver "Benjamin David Lunt" <zfysz@fysnet.net> - 2016-03-08 11:43 -0700
  Re: The ATA is ignoring my driver "Isaac D. Cohen" <8switchsoftware@gmail.com> - 2016-03-09 07:44 -0800
    Re: The ATA is ignoring my driver "Benjamin David Lunt" <zfysz@fysnet.net> - 2016-03-09 12:04 -0700

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