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- Path: sparky!uunet!munnari.oz.au!metro!socs.uts.edu.au!kralizec.zeta.org.au!ixgate!michael.smith
- From: michael.smith@f842.n800.z3.fido.zeta.org.au (michael smith)
- Message-ID: <3_800_842_fidonet2b3c3667@Kralizec.fido.zeta.org.au>
- Newsgroups: comp.sys.atari.st.tech
- Subject: Re: Info about IDE-bus wanted.
- Organization: Fidonet. Gate admin is fido@socs.uts.edu.au
- Date: 26 Dec 92 11:27:32 GMT
- Lines: 43
-
- Original to: epklel@kaepk.ericsson.se
- In a message of <10 Dec 92 13:11:57>, epklel@kaepk.ericsson.se (3:713/602)
- writes:
-
- e> I need information about the IDE-bus:
-
- I can give you some general information, but I should warn you - to the best
- of my knowledge, there was only ever a draft specification produced, which
- bears only a superficial resemblance to the interface as it stands.
-
- e> - Pinouts of the port.
- e> - Signal timing diagram.
-
- Sorry, can't help there. (I had the info, but having determined that the
- ST's parallel port couldn't drive it, unlike a PC's, I threw it out)
-
- e> - How does it work:
- e> - Is it a sort of protcol used or
- e> - does it use register map (like an ordinary periferal)?
-
- The IDE interface emulates very closely the register map and operation
- principles of the standard ISA bus harddisk controllers.
-
- To talk to them you'll need a 16-bit wide bidirectional databus (although
- some can be convinced to talk 8 bits wide, and all commands are only 8bits
- wide)
-
- If you intend to talk to it with any speed, you'll need to provide
- appropriate DMA-type signals, otherwise you can just read a sector at a time
- out of the sector buffer.
-
- From memory, you'll also need about 5 outgoing control lines, and 3 incoming
- ones.
-
- Sorry I can't be more specific - if you still need the details after the
- summary, I'll see if my source can get the data again.
-
- e> Lennart
-
- \`miff` /|\
-
- --- ScanMail 0.68 X0501
- * Origin: That Which Is Not, ST in SA. 61-8-232-5722 (3:800/842)
-