| 1 | ; Project name : XTIDE Universal BIOS |
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| 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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| 8 | ; Emulates INSW for XTIDE dual (8-bit) data port. |
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| 9 | ; |
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| 10 | ; eDUAL_BYTE_PORT_INSW |
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| 11 | ; Parameters: |
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| 12 | ; BX: Bit mask for toggling XTIDE data low/high reg |
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| 13 | ; DX: Port address (must be IDE Data Register) |
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| 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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| 20 | %macro eDUAL_BYTE_PORT_INSW 0 |
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| 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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| 38 | ; Emulates OUTSW for XTIDE dual (8-bit) data port. |
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| 39 | ; |
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| 40 | ; eDUAL_BYTE_PORT_OUTSW |
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| 41 | ; Parameters: |
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| 42 | ; BX: Bit mask for toggling XTIDE data low/high reg |
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| 43 | ; DX: Port address (must be IDE Data Register) |
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| 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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| 50 | %macro eDUAL_BYTE_PORT_OUTSW 0 |
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| 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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| 55 | xor dx, bx ; IDE Data Reg to XTIDE Data Low Reg |
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| 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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| 62 | xor dx, bx ; XTIDE Data High Reg to IDE Data Reg |
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| 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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| 69 | %endif ; IDE_8BIT_INC |
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