Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

PCMCIA cdrom controller, Harddrive ??

Status
Not open for further replies.

kyndal

Member level 4
Joined
Feb 16, 2003
Messages
68
Helped
6
Reputation
12
Reaction score
5
Trophy points
1,288
Activity points
878
Im the "lucky" owner of an old ARCHOS 24x Pcmcia cdrom.
and last night i took it apart (to bored :) ) and yes, as expected it was a
100% standard ATAPI Drive..
And Clever as i can be. i thought What would stop me from
hacking it to do for a harddrive insted!

there is no "intelligence" in the PCB inside the cdrom case,
so alle conversion needed is made in the pcmcia card.

Does any of you know about PCMCIA - IDE controllers / adapters?
i know that CF cards are pcmcia compatible, but aparently they run as "memorycard" when in pcmca?

Is it posible to more or les directly hook up a harddrive to pcmcia?
Pinouts of this conversion?

Any input??

/Kyndal
 

robotman

Member level 3
Joined
Jan 11, 2002
Messages
60
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
693
PCMCIA is just an extention of the PC's ISA bus. Almost all of the timing is the same. In the case of a PCI adapter, it performs a bridging function.

As for the controller, it is a simple IDE interface inside the PCMCIA card. It includes a few extra goodies for PCMCIA support (config memory, power sequencing, etc), but in the end, it usually maps into one of the four IDE addresses (1F0, 1E0, ....).

As for CF cards, they DO NOT map into a memorycard. It uses I/O space just like the IDE interfaces do. If fact, the address space is limited (A10 or A15 I think) so that the memory window would be really small. A CF card also has a mode to directly look like a IDE/ATAPI harddrive (no config space needed).

As for the hookup, I think that it might be possible. The big problem is the intialization of the PCMCIA controller on the PC side (I am making an assumption here). A PCMCIA controller is just a bridge/mapper to open memory windows in the PC space into the PCMCIA card space. Most controller (at least the older ones) were Intel SL365 (??) compatible.

Hope this helps..
 

kyndal

Member level 4
Joined
Feb 16, 2003
Messages
68
Helped
6
Reputation
12
Reaction score
5
Trophy points
1,288
Activity points
878
Yes..
The pcmcia card only contains a AT27C010 memory chip, and a 74HC02
and the rest is almost direvtly passed to the connector (som resistors) pull up/down i suppose!.

The card is initiallized by the PC, as a ATAPI controller.
so i guess it is possible
The thing i need now, is probally just some pinout on how to hook the connector to the harddrive?


/Kyndal
 

robotman

Member level 3
Joined
Jan 11, 2002
Messages
60
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
693
Do you have the specs? It should be straight forward if you do. If not let me know....

robotman
 

kyndal

Member level 4
Joined
Feb 16, 2003
Messages
68
Helped
6
Reputation
12
Reaction score
5
Trophy points
1,288
Activity points
878
I dont have any specs..
i you refer to the inside og the card.. well i took that apart too :)

if you have anything that could help me,
it would be great!

/Kyndal
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top