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HP-IL floppy disk commands ?
Message #1 Posted by Pavel Korensky on 9 Dec 2003, 12:58 p.m.

Hello,

anyone have the listing of DDT/DDL HP-IL commands for HP9114 floppy disk ?

I am not able to find them in any available documentation.

I especially need the description od bits in Status byte.

Also, I need to know what commands behave differently from cassette drive. For example, during SEEK command, the tape unit signal Size error, if the Track is more than 1 (tape organisation is 2 tracks, 256 records).

I suppose that because the FD disk is organised as 2x77 tracks, 16 records per track, the SEEK command should also have two bytes (for compatibility), first byte is track number (0..153) and second byte is record number (0..15) right ?

My mass storage now emulates all operations with the tape (writing part of program is almost finished). Now, I need to extend the functionality to floppy disk emulation.

Thx for any informations

PavelK

      
Re: HP-IL floppy disk commands ?
Message #2 Posted by HrastProgrammer on 10 Dec 2003, 2:01 a.m.,
in response to message #1 by Pavel Korensky

I collected information about disk drive from HP-71B HP-IL ROM while worked on HP-IL emulation for HP-71X. There are few new DDL & DDT commands compared to the cassete drive:

DDL11: Verify Medium

DDT5: Transfer Buffer
DDT6: Send Implementation
DDT7: Send Max Record (#099F)

Regards.

            
Re: HP-IL floppy disk commands ?
Message #3 Posted by Pavel Korensky on 10 Dec 2003, 7:50 a.m.,
in response to message #2 by HrastProgrammer

Thank you very much.

Do you know the more detailed description of Verify medium and Send implementation commands ?

Status byte definition is the same as in cassett drive ?

                  
Re: HP-IL floppy disk commands ?
Message #4 Posted by HrastProgrammer on 10 Dec 2003, 8:15 a.m.,
in response to message #3 by Pavel Korensky

I really don't know about Verify Medium and I have left it unimplemented because it doesn't have much sense in my implementation of HP-IL, anyway.

Send Implementation is sending the following bytes to the controller:

#00 #00 #00 #4D #00 #00 #00 #02 #00 #00 #00 #10

AFAIK, the status byte hasn't changed.

Regards.

                        
Re: HP-IL floppy disk commands ?
Message #5 Posted by HrastProgrammer on 10 Dec 2003, 8:32 a.m.,
in response to message #4 by HrastProgrammer

... it doesn't have much sense in my implementation of HP-IL, anyway

... and because it hasn't been used in the HP-71B firmware.

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