Mercurial > hg > Members > kono > nitros9-code

view defs/ide.d @ 3274:d80acb6d104b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
os9gen: Fix bitmap check/update where boot sector is non-zero And on builds where the boot track is zero, most likely for Dragon, don't check or update the bitmap because the boot track should be reserved already. Ideally all this should be a run-time checks of the disk parameters and not depend on the build target. Later.
author Tormod Volden <debian.tormod@gmail.com>
date Sat, 07 Mar 2020 21:32:30 +0100
parents b8c7b7fbf3c9
children
line wrap: on
line source

          IFNE      IDE.D-1
IDE.D    SET       1
********************************************************************
* ide.d - IDE definitions
*
* $Id$
*
* (C) 2004 Boisy G. Pitre - Licensed to Cloud-9
*
* Edt/Rev  YYYY/MM/DD  Modified by
* Comment
* ------------------------------------------------------------------
*          2005/12/11  Boisy G. Pitre
* Moved IDE base addresses and I/O offsets to here.

*
* ATAPI Commands
*
A$READ2        EQU       $A8
A$WRITE2       EQU       $AA
A$READ         EQU       $28
A$WRITE        EQU       $2A
A$STOP         EQU       $1B

*
* ATA Commands
*
S$READ         EQU       $20
S$WRITE        EQU       $30

*
* IDE Registers
*
DataReg        EQU       0                   Data (1st 8 bits, non-latched)
ErrorReg       EQU       1                   Error # when read
Features       EQU       1                   Features when write
SectCnt        EQU       2                   Sector count
SectNum        EQU       3                   Sector #
CylLow         EQU       4                   Low byte of cylinder
CylHigh        EQU       5                   High byte of cylinder
DevHead        EQU       6                   Device/Head
Status         EQU       7                   Status when read
Command        EQU       7                   Command when write
Latch          EQU       8                   Latch (2nd 8 bits of 16 bit word)

BusyBit        EQU       %10000000           BUSY=1 
DrdyBit        EQU       %01000000           drive ready=1 
DscBit         EQU       %00010000           seek finished=1 
DrqBit         EQU       %00001000           data requested=1 
ErrBit         EQU       %00000001           error_reg has it 
RdyTrk         EQU       %01010000           ready & over track 
RdyDrq         EQU       %01011000           ready w/ data 

**** IDE Interface Definitions
               IFNE      IDE
SDAddr         SET       $FF50
               ENDC      

               ENDC