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Last change
on this file since 132 was 131, checked in by Tomi Tilli, 14 years ago |
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Changes to Assembly Library:
- Some functions are now excluded from XTIDE Universal BIOS with EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS define.
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File size:
1.7 KB
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| 1 | ; Project name : Assembly Library
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| 2 | ; Description : Functions for register operations.
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| 3 |
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| 4 |
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| 5 | ; Section containing code
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| 6 | SECTION .text
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| 7 |
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| 8 | ;--------------------------------------------------------------------
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| 9 | ; Registers_ExchangeDSSIwithESDI
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| 10 | ; Parameters
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| 11 | ; Nothing
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| 12 | ; Returns:
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| 13 | ; DS:SI and ES:DI are exchanged.
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| 14 | ; Corrupts registers:
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| 15 | ; Nothing
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| 16 | ;--------------------------------------------------------------------
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| 17 | ALIGN JUMP_ALIGN
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| 18 | Registers_ExchangeDSSIwithESDI:
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| 19 | push ds
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| 20 | push es
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| 21 | pop ds
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| 22 | pop es
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| 23 | xchg si, di
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| 24 | ret
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| 25 |
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| 26 |
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| 27 | ;--------------------------------------------------------------------
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| 28 | ; Registers_CopySSBPtoESDI
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| 29 | ; Registers_CopySSBPtoDSSI
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| 30 | ; Registers_CopyDSSItoESDI
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| 31 | ; Registers_CopyESDItoDSSI
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| 32 | ; Parameters
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| 33 | ; Nothing
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| 34 | ; Returns:
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| 35 | ; Copies farm pointer to different segment/pointer register pair
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| 36 | ; Corrupts registers:
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| 37 | ; Nothing
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| 38 | ;--------------------------------------------------------------------
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| 39 | ALIGN JUMP_ALIGN
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| 40 | Registers_CopySSBPtoESDI:
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| 41 | COPY_SSBP_TO_ESDI
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| 42 | ret
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| 43 |
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| 44 | %ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
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| 45 | ALIGN JUMP_ALIGN
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| 46 | Registers_CopySSBPtoDSSI:
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| 47 | COPY_SSBP_TO_DSSI
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| 48 | ret
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| 49 |
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| 50 | ALIGN JUMP_ALIGN
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| 51 | Registers_CopyDSSItoESDI:
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| 52 | COPY_DSSI_TO_ESDI
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| 53 | ret
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| 54 |
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| 55 | ALIGN JUMP_ALIGN
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| 56 | Registers_CopyESDItoDSSI:
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| 57 | COPY_ESDI_to_DSSI
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| 58 | ret
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| 59 | %endif
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| 60 |
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| 61 |
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| 62 | ;--------------------------------------------------------------------
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| 63 | ; Registers_SetZFifNullPointerInDSSI (commented to save bytes)
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| 64 | ; Parameters
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| 65 | ; DS:SI: Far pointer
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| 66 | ; Returns:
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| 67 | ; ZF: Set if NULL pointer in DS:SI
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| 68 | ; Corrupts registers:
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| 69 | ; Nothing
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| 70 | ;--------------------------------------------------------------------
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| 71 | ;ALIGN JUMP_ALIGN
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| 72 | ;Registers_SetZFifNullPointerInDSSI:
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| 73 | ; push ax
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| 74 | ; mov ax, ds
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| 75 | ; or ax, si
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| 76 | ; pop ax
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| 77 | ; ret
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