[593] | 1 | ; Project name : Assembly Library |
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| 2 | ; Description : Defines for accessing CMOS. |
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| 3 | |
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| 4 | ; |
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| 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2018 by XTIDE Universal BIOS Team. |
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| 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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| 12 | ; |
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| 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | ; GNU General Public License for more details. |
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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| 19 | |
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| 20 | %ifndef CMOS_INC |
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| 21 | %define CMOS_INC |
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| 22 | |
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| 23 | ; CMOS Ports |
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| 24 | ; Note that a data register read or write must follow every write to the address register |
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| 25 | CMOS_INDEX_REGISTER EQU 70h ; Is this write only? |
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| 26 | CMOS_DATA_REGISTER EQU 71h |
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| 27 | |
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| 28 | FLG_CMOS_INDEX_NMI_DISABLE EQU (1<<7) ; CMOS Index Register bit 7 is NMI disable/enable bit |
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| 29 | |
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| 30 | |
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| 31 | ; Almost all of the CMOS locations are vendor specific and |
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| 32 | ; there is very little standardation |
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| 33 | HARD_DISK_TYPES EQU 12h ; Windows 95 reads this to check if IDE drives |
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| 34 | ; are present so it should be safe to access this. |
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| 35 | ; Bits 0...3 Hard Disk 1 type (Primary Slave) |
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| 36 | ; Bits 4...7 Hard Disk 0 type (Primary Master) |
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| 37 | ; Fh = Types 16...47 (defined elsewhere in CMOS) |
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| 38 | CHECKSUM_OF_BYTES_10hTo2Dh_LOW EQU 2Fh ; Most BIOSes store checksum of bytes 10h to 2Dh here |
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| 39 | CHECKSUM_OF_BYTES_10hTo2Dh_HIGH EQU 2Eh ; High byte of the checksum |
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| 40 | |
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| 41 | |
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| 42 | %endif ; CMOS_INC |
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