1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Int 13h function AH=23h, |
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3 | ; Set Controller Features Register. |
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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 | ; Int 13h function AH=23h, Set Controller Features Register. |
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10 | ; |
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11 | ; AH23h_HandlerForSetControllerFeatures |
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12 | ; Parameters: |
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13 | ; AL, CX: Same as in INTPACK |
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14 | ; DL: Translated Drive number |
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15 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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16 | ; SS:BP: Ptr to IDEPACK |
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17 | ; Parameters on INTPACK: |
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18 | ; AL: Feature Number (parameter to Features Register = subcommand) |
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19 | ; (Parameter registers are undocumented, these are specific for this BIOS): |
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20 | ; BL: Parameter to Sector Count Register (subcommand specific) |
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21 | ; BH: Parameter to LBA Low / Sector Number Register (subcommand specific) |
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22 | ; CL: Parameter to LBA Middle / Cylinder Low Register (subcommand specific) |
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23 | ; CH: Parameter to LBA High / Cylinder High Register (subcommand specific) |
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24 | ; Returns with INTPACK: |
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25 | ; AH: Int 13h return status |
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26 | ; CF: 0 if succesfull, 1 if error |
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27 | ;-------------------------------------------------------------------- |
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28 | ALIGN JUMP_ALIGN |
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29 | AH23h_HandlerForSetControllerFeatures: |
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30 | xchg si, ax ; SI = Feature Number |
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31 | mov dx, [bp+IDEPACK.intpack+INTPACK.bx] |
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32 | %ifndef USE_186 |
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33 | call AH23h_SetControllerFeatures |
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34 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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35 | %else |
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36 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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37 | ; Fall to AH23h_SetControllerFeatures |
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38 | %endif |
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39 | |
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40 | |
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41 | ;-------------------------------------------------------------------- |
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42 | ; AH23h_SetControllerFeatures |
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43 | ; Parameters: |
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44 | ; DL: Parameter to Sector Count Register (subcommand specific) |
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45 | ; DH: Parameter to LBA Low / Sector Number Register (subcommand specific) |
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46 | ; CL: Parameter to LBA Middle / Cylinder Low Register (subcommand specific) |
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47 | ; CH: Parameter to LBA High / Cylinder High Register (subcommand specific) |
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48 | ; SI: Feature Number (parameter to Features Register = subcommand) |
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49 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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50 | ; SS:BP: Ptr to IDEPACK |
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51 | ; Returns: |
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52 | ; AH: Int 13h return status |
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53 | ; CF: 0 if succesfull, 1 if error |
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54 | ; Corrupts registers: |
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55 | ; AL, BX, CX, DX |
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56 | ;-------------------------------------------------------------------- |
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57 | ;ALIGN JUMP_ALIGN |
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58 | AH23h_SetControllerFeatures: |
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59 | mov al, COMMAND_SET_FEATURES |
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60 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY) |
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61 | jmp Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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