[150] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Macros for accessing data port(s) on 8-bit |
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| 3 | ; IDE controllers. |
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[376] | 4 | |
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| 5 | ; |
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[445] | 6 | ; XTIDE Universal BIOS and Associated Tools |
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[526] | 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[376] | 8 | ; |
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| 9 | ; This program is free software; you can redistribute it and/or modify |
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| 10 | ; it under the terms of the GNU General Public License as published by |
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| 11 | ; the Free Software Foundation; either version 2 of the License, or |
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| 12 | ; (at your option) any later version. |
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[445] | 13 | ; |
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[376] | 14 | ; This program is distributed in the hope that it will be useful, |
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| 15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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[445] | 17 | ; GNU General Public License for more details. |
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[376] | 18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 19 | ; |
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| 20 | |
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[3] | 21 | %ifndef IDE_8BIT_INC |
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| 22 | %define IDE_8BIT_INC |
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| 23 | |
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| 24 | ;-------------------------------------------------------------------- |
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[152] | 25 | ; Emulates INSW for XTIDE. |
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[3] | 26 | ; |
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[152] | 27 | ; XTIDE_INSW |
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[3] | 28 | ; Parameters: |
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[370] | 29 | ; BL: Bit mask for toggling XTIDE data low/high reg |
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[152] | 30 | ; DX: XTIDE Data Low Register address |
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[3] | 31 | ; ES:DI: Ptr to destination buffer |
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| 32 | ; Returns: |
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| 33 | ; ES:DI: Incremented/decremented for next word |
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| 34 | ; Corrupts registers: |
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| 35 | ; AL, FLAGS |
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| 36 | ;-------------------------------------------------------------------- |
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[152] | 37 | %macro XTIDE_INSW 0 |
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[3] | 38 | %ifdef USE_186 ; INS instruction available |
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| 39 | insb ; Load low byte from port DX to [ES:DI] |
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[370] | 40 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 41 | insb ; Load high byte from port DX to [ES:DI] |
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[370] | 42 | xor dl, bl ; Restore to IDE Data Register |
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[3] | 43 | %else ; If 8088/8086 |
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| 44 | in al, dx ; Load low byte from port |
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[370] | 45 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 46 | stosb ; Store byte to [ES:DI] |
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| 47 | in al, dx ; Load high byte from port |
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[370] | 48 | xor dl, bl ; Restore to IDE Data Register |
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[3] | 49 | stosb ; Store byte to [ES:DI] |
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| 50 | %endif |
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| 51 | %endmacro |
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| 52 | |
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| 53 | |
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| 54 | ;-------------------------------------------------------------------- |
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[152] | 55 | ; Emulates OUTSW for XTIDE. |
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[3] | 56 | ; |
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[152] | 57 | ; XTIDE_OUTSW |
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[3] | 58 | ; Parameters: |
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[370] | 59 | ; BL: Bit mask for toggling XTIDE data low/high reg |
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[152] | 60 | ; DX: XTIDE Data Low Register address |
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[3] | 61 | ; DS:SI: Ptr to source buffer |
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| 62 | ; Returns: |
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| 63 | ; SI: Incremented/decremented for next word |
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| 64 | ; Corrupts registers: |
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| 65 | ; AX, FLAGS |
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| 66 | ;-------------------------------------------------------------------- |
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[152] | 67 | %macro XTIDE_OUTSW 0 |
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[3] | 68 | %ifdef USE_186 ; OUTS instruction available |
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| 69 | lodsb ; Load low byte from [DS:SI] to AL |
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[370] | 70 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 71 | outsb ; Output high byte from [DS:SI] |
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[370] | 72 | xor dl, bl ; XTIDE Data High Reg to Data Low Reg |
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[3] | 73 | out dx, al ; Output low byte from AL |
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| 74 | %else ; If 8088/8086 |
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| 75 | lodsw ; Load word from [DS:SI] |
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[370] | 76 | xor dl, bl ; IDE Data Reg to XTIDE Data High Reg |
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[3] | 77 | xchg al, ah ; => AL=high byte, AH=low byte |
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| 78 | out dx, al ; Output high byte |
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[370] | 79 | xor dl, bl ; XTIDE Data High Reg to Data Low Reg |
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[3] | 80 | mov al, ah ; Copy low byte to AL |
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| 81 | out dx, al ; Output low byte |
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| 82 | %endif |
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| 83 | %endmacro |
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| 84 | |
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| 85 | |
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[152] | 86 | ;-------------------------------------------------------------------- |
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| 87 | ; Emulates OUTSW for modified XTIDE. |
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| 88 | ; |
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| 89 | ; XTIDE_MOD_OUTSW |
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| 90 | ; Parameters: |
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| 91 | ; DX: XTIDE Data Low Register address |
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| 92 | ; DS:SI: Ptr to source buffer |
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| 93 | ; Returns: |
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| 94 | ; SI: Incremented/decremented for next word |
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| 95 | ; Corrupts registers: |
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| 96 | ; AX, FLAGS |
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| 97 | ;-------------------------------------------------------------------- |
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| 98 | %macro XTIDE_MOD_OUTSW 0 |
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| 99 | %ifdef USE_186 ; OUTS instruction available |
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| 100 | lodsb ; Load low byte from [DS:SI] to AL |
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| 101 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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| 102 | outsb ; Output high byte from [DS:SI] |
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| 103 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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| 104 | out dx, al ; Output low byte from AL |
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| 105 | %else ; If 8088/8086 |
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| 106 | lodsw ; Load word from [DS:SI] |
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| 107 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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| 108 | xchg al, ah ; => AL=high byte, AH=low byte |
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| 109 | out dx, al ; Output high byte |
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| 110 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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| 111 | mov al, ah ; Copy low byte to AL |
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| 112 | out dx, al ; Output low byte |
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| 113 | %endif |
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| 114 | %endmacro |
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| 115 | |
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| 116 | |
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[3] | 117 | %endif ; IDE_8BIT_INC |
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