Changeset 75

Timestamp:

Apr 8, 2017, 12:26:10 AM (8 years ago)

Author:

Ben Rietbroek

Message:

Added debug hotkeys '0'-'9' for dumping disk info [v1.1.1-testing]

Key '0' corresponds to BIOS disk 80h, '1' to 81h, etc.
It uses INT13(X) BIOS calls, of which the functionality can depend on
adapter BIOSes, UEFI CSM, BIOS USB MSD implementations and whatnot.

CAUTION:
This is a testbuild !
AirBoot uses the BIOS to access disks and a small coding error can trash
partition tables or other vital disk structures. You are advised to make
backups of TRACK0 and EBRs before using this testbuild. More info at:
​https://rousseaux.github.io/netlabs.air-boot/pdf/AirBoot-v1.1.0-manual.pdf

File:

• trunk/bootcode/regular/debug.asm (modified) (4 diffs)

trunk/bootcode/regular/debug.asm

@@ -69 +69 @@
 ; Show help on keys.
 ;
-dbh     db  10,'h=HELP, d=DRIVE-LETTERS, g=GEO, i=IPT, r=RESTART, v=VOL-LETTERS, x=XREF',10,10,0
+dbh     db  10
+        db  'h=HELP, d=DRIVE-LETTERS, g=GEO, i=IPT, r=RESTART, v=VOL-LETTERS, x=XREF',10
+        db  '0-9=disk 80h-89h info',10
+        db  10,0
+
 DEBUG_ShowHelp      Proc
         pushf
@@ -118 +122 @@
         cmp     al,'9'
         ja      DEBUG_HandleKeypress_try_alpha
-        ; It was a digit.
-        jmp     DEBUG_HandleKeypress_check_it
+        ; It was a digit, dump disk info ('0' for 80h, '1' for 81h, etc)
+        call    DEBUG_DumpDiskInfo
+        ;~ jmp     DEBUG_HandleKeypress_check_it
+        jmp     DEBUG_HandleKeypress_exit
 
         ; Check for alpha.
@@ -496 +502 @@
 DEBUG_DumpDriveLetters      EndP
 
+;
+; Dump some disk information.
+;
+__DUMP_DI__     EQU
+DEBUG_DumpDiskInfo          Proc
+    IFDEF   __DUMP_DI__
+        pushf
+        pusha
+
+        add     al, 50h                 ; ASCII '0' to BIOS 80h, '1'->81h, etc.
+
+        mov     si, offset [ddi]
+        call    AuxIO_Print
+
+        call    AuxIO_TeletypeHexByte
+        call    AuxIO_TeletypeNL
+
+        popa
+        popf
+    ENDIF
+        ret
+DEBUG_DumpDiskInfo          EndP
 
 ;
@@ -888 +916 @@
 xrt     db  10,'XrefTable:',10,0
 ddl     db  10,'Driveletters:',10,0
+ddi     db  10,'DumpDiskInfo:',10,0
 dvl     db  10,'VolumeLetters:',10,0
 dlra    db  10,'LVM_DoLetterReassignment: ',0