|
Last change
on this file since 623 was 294, checked in by krille_n_@…, 12 years ago |
|
Commit 2/2 (BIOS):
- Fixed a bug in AH1h_HStatus.asm.
- Minor optimizations.
- Fixed spelling and did some cleaning.
|
|
File size:
1.2 KB
|
| Line | |
|---|
| 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : Int 13h function AH=41h, Check if Extensions Present.
|
|---|
| 3 |
|
|---|
| 4 | ; Section containing code
|
|---|
| 5 | SECTION .text
|
|---|
| 6 |
|
|---|
| 7 | ;--------------------------------------------------------------------
|
|---|
| 8 | ; Int 13h function AH=41h, Check if Extensions Present.
|
|---|
| 9 | ;
|
|---|
| 10 | ; AH41h_HandlerForCheckIfExtensionsPresent
|
|---|
| 11 | ; Parameters:
|
|---|
| 12 | ; DL: Translated Drive number
|
|---|
| 13 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 14 | ; SS:BP: Ptr to IDEPACK
|
|---|
| 15 | ; Parameters on INTPACK:
|
|---|
| 16 | ; BX: 55AAh
|
|---|
| 17 | ; Returns with INTPACK:
|
|---|
| 18 | ; AH: Major version of EBIOS extensions
|
|---|
| 19 | ; BX: AA55h
|
|---|
| 20 | ; CX: Support bits
|
|---|
| 21 | ; CF: 0 if successful, 1 if error
|
|---|
| 22 | ;--------------------------------------------------------------------
|
|---|
| 23 | ALIGN JUMP_ALIGN
|
|---|
| 24 | AH41h_HandlerForCheckIfExtensionsPresent:
|
|---|
| 25 | cmp WORD [bp+IDEPACK.intpack+INTPACK.bx], 55AAh
|
|---|
| 26 | jne SHORT .EbiosNotSupported
|
|---|
| 27 |
|
|---|
| 28 | mov BYTE [bp+IDEPACK.intpack+INTPACK.ah], EBIOS_VERSION
|
|---|
| 29 | mov WORD [bp+IDEPACK.intpack+INTPACK.bx], 0AA55h
|
|---|
| 30 | mov WORD [bp+IDEPACK.intpack+INTPACK.cx], ENHANCED_DRIVE_ACCESS_SUPPORT
|
|---|
| 31 | and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF ; Return with CF cleared
|
|---|
| 32 | jmp Int13h_ReturnFromHandlerWithoutStoringErrorCode
|
|---|
| 33 | .EbiosNotSupported:
|
|---|
| 34 | jmp Int13h_UnsupportedFunction
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
