Ignore:
Timestamp:
Feb 22, 2012, 7:01:53 PM (13 years ago)
Author:
gregli@…
google:author:
gregli@hotmail.com
Message:

Added floppy drive emulation over the serial connection (MODULE_SERIAL_FLOPPY). Along the way, various optimizations were made to stay within the 8K ROM size target. Also, serial code now returns the number of sectors transferred.

File:
1 edited

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  • trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH1h_HStatus.asm

    r150 r258  
    2020AH1h_HandlerForReadDiskStatus:
    2121    LOAD_BDA_SEGMENT_TO ds, ax, !
     22
     23%ifdef MODULE_SERIAL_FLOPPY
     24    test    dl, dl
     25    jns     .HardDisk
     26    mov     ah, [BDA.bFDRetST]      ; Unlike for hard disks below, floppy version does not clear the status
     27    jmp     .done
     28.HardDisk: 
     29%endif
     30       
    2231    xchg    ah, [BDA.bHDLastSt]     ; Load and clear last error
     32                                    ; Note that AH is cleared with the LOAD_BDA_SEGMENT above
     33               
     34.done:
    2335    call    Int13h_SetErrorCodeToIntpackInSSBPfromAH
    2436    jmp     Int13h_ReturnFromHandlerWithoutStoringErrorCode
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