[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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| 4 | %ifndef IDE_8BIT_INC |
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| 5 | %define IDE_8BIT_INC |
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| 6 | |
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| 7 | ;-------------------------------------------------------------------- |
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[152] | 8 | ; Emulates INSW for XTIDE. |
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[3] | 9 | ; |
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[152] | 10 | ; XTIDE_INSW |
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[3] | 11 | ; Parameters: |
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| 12 | ; BX: Bit mask for toggling XTIDE data low/high reg |
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[152] | 13 | ; DX: XTIDE Data Low Register address |
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[3] | 14 | ; ES:DI: Ptr to destination buffer |
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| 15 | ; Returns: |
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| 16 | ; ES:DI: Incremented/decremented for next word |
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| 17 | ; Corrupts registers: |
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| 18 | ; AL, FLAGS |
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| 19 | ;-------------------------------------------------------------------- |
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[152] | 20 | %macro XTIDE_INSW 0 |
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[3] | 21 | %ifdef USE_186 ; INS instruction available |
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| 22 | insb ; Load low byte from port DX to [ES:DI] |
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| 23 | xor dx, bx ; IDE Data Reg to XTIDE Data High Reg |
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| 24 | insb ; Load high byte from port DX to [ES:DI] |
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| 25 | xor dx, bx ; Restore to IDE Data Register |
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| 26 | %else ; If 8088/8086 |
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| 27 | in al, dx ; Load low byte from port |
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| 28 | xor dx, bx ; IDE Data Reg to XTIDE Data High Reg |
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| 29 | stosb ; Store byte to [ES:DI] |
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| 30 | in al, dx ; Load high byte from port |
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| 31 | xor dx, bx ; Restore to IDE Data Register |
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| 32 | stosb ; Store byte to [ES:DI] |
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| 33 | %endif |
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| 34 | %endmacro |
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| 35 | |
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| 36 | |
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| 37 | ;-------------------------------------------------------------------- |
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[152] | 38 | ; Emulates OUTSW for XTIDE. |
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[3] | 39 | ; |
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[152] | 40 | ; XTIDE_OUTSW |
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[3] | 41 | ; Parameters: |
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| 42 | ; BX: Bit mask for toggling XTIDE data low/high reg |
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[152] | 43 | ; DX: XTIDE Data Low Register address |
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[3] | 44 | ; DS:SI: Ptr to source buffer |
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| 45 | ; Returns: |
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| 46 | ; SI: Incremented/decremented for next word |
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| 47 | ; Corrupts registers: |
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| 48 | ; AX, FLAGS |
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| 49 | ;-------------------------------------------------------------------- |
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[152] | 50 | %macro XTIDE_OUTSW 0 |
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[3] | 51 | %ifdef USE_186 ; OUTS instruction available |
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| 52 | lodsb ; Load low byte from [DS:SI] to AL |
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| 53 | xor dx, bx ; IDE Data Reg to XTIDE Data High Reg |
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| 54 | outsb ; Output high byte from [DS:SI] |
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[152] | 55 | xor dx, bx ; XTIDE Data High Reg to Data Low Reg |
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[3] | 56 | out dx, al ; Output low byte from AL |
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| 57 | %else ; If 8088/8086 |
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| 58 | lodsw ; Load word from [DS:SI] |
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| 59 | xor dx, bx ; IDE Data Reg to XTIDE Data High Reg |
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| 60 | xchg al, ah ; => AL=high byte, AH=low byte |
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| 61 | out dx, al ; Output high byte |
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[152] | 62 | xor dx, bx ; XTIDE Data High Reg to Data Low Reg |
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[3] | 63 | mov al, ah ; Copy low byte to AL |
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| 64 | out dx, al ; Output low byte |
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| 65 | %endif |
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| 66 | %endmacro |
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| 67 | |
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| 68 | |
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[152] | 69 | ;-------------------------------------------------------------------- |
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| 70 | ; Emulates OUTSW for modified XTIDE. |
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| 71 | ; |
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| 72 | ; XTIDE_MOD_OUTSW |
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| 73 | ; Parameters: |
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| 74 | ; DX: XTIDE Data Low Register address |
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| 75 | ; DS:SI: Ptr to source buffer |
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| 76 | ; Returns: |
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| 77 | ; SI: Incremented/decremented for next word |
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| 78 | ; Corrupts registers: |
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| 79 | ; AX, FLAGS |
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| 80 | ;-------------------------------------------------------------------- |
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| 81 | %macro XTIDE_MOD_OUTSW 0 |
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| 82 | %ifdef USE_186 ; OUTS instruction available |
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| 83 | lodsb ; Load low byte from [DS:SI] to AL |
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| 84 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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| 85 | outsb ; Output high byte from [DS:SI] |
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| 86 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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| 87 | out dx, al ; Output low byte from AL |
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| 88 | %else ; If 8088/8086 |
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| 89 | lodsw ; Load word from [DS:SI] |
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| 90 | inc dx ; IDE Data Reg to XTIDE MOD Data High Reg |
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| 91 | xchg al, ah ; => AL=high byte, AH=low byte |
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| 92 | out dx, al ; Output high byte |
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| 93 | dec dx ; XTIDE Data High Reg to Data Low Reg |
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| 94 | mov al, ah ; Copy low byte to AL |
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| 95 | out dx, al ; Output low byte |
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| 96 | %endif |
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| 97 | %endmacro |
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| 98 | |
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| 99 | |
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[3] | 100 | %endif ; IDE_8BIT_INC |
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