news:22iapuo8gsi4oa3rnlpebo04o25vo1nv82@4ax.com...
> Jeremy,
>
> I really appreciate your replying to this topic.
> I've got the tuples decoded, so the easy part is done :)
>
> I have one last question, and it goes more to my understanding of the
> way the book I'm reading explains things
> (PCMCIA Developers Guide, 3rd Edition)
>
> My understanding of what the book says,
>
> "To switch to I/O Mode from Attribute Mode:"
>
> De-assert REG#, OE#  & WR#  (Make them outputs and set them high)
> Place 0x3E0 on the Address Lines
> Place 0x01 on the Data Lines
> Strobe IOWR
> Wait 500ms
> Check -Ready#-      (If asserted, wait more)
>
> "...The card is now in I/O mode. "
>
>
> Does this sound basically correct?

No, using IOWR implies you're already in I/O mode. Use WR (i.e. do a write
to attribute memory at  address 3E0), assuming you've checked the tuples to
make sure the config reg is at 3E0 (bytes 4-7 of CISTPL_CONFIG, which has
code 1Ah).

Jeremy Bentham
Iosoft Ltd.


Thanks Jeremy,

I re-read it and now it makes sence. 
Now if I could only get it to actualy work...

I remember reading an eariler post from you regarding level converters
and that you didn't think they were needed.
 
I take it the the mico you used is 5 volt ?

The one I'm trying is 3.3 volt and it looks like it can read from the
card, but cannot write to it.

Using WE# as a write strobe, I cannot get it to accept the 01 at 0x3E0
and switch modes. The card I'm trying is  based on the Prisim 2.5
chipset. I thought it was 3.3/5.0, but it doesn't seem to wite at 3.3

But, on the brighter side, as least I can read from the card !

Steve

[Samples from my card]

0=1
2=3
4=0
6=0
8=ff
a=17
c=4
e=67
10=5a
12=8
14=ff
......
3dc=ff
3de=ff
3e0=0
3e2=80

[Sample of Decoded Tuples]

0=1a  #1A CISTPL_CONFIG
2=7  Link to next Tuple
4=3  Size of field bytes
6=1  Index To Last Entry In Table
8=e0 Configuration Register Base (0x03e0)
a=3
c=0
e=0
0=1

0=1d #1D CISTPL_DEVICE_0A (For Attribute Memory)
2=5 Link to next Tuple
4=1 Other Conditions info field
6=67 1100111 (My book does not explain this tuple)
8=5a 1011010 
A=8 0001000
C=ff  End of Tuple


On Sun, 29 Sep 2002 12:25:33 +0100, "Jeremy Bentham"
 wrote:
>No, using IOWR implies you're already in I/O mode. Use WR (i.e. do a write
>to attribute memory at  address 3E0), assuming you've checked the tuples to
>make sure the config reg is at 3E0 (bytes 4-7 of CISTPL_CONFIG, which has
>code 1Ah).
>
>Jeremy Bentham
>Iosoft Ltd.
>