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Fixed a "blue screen" hang when trying to write a configuration to a read-only device

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git-svn-id: svn://kolibrios.org@9942 a494cfbc-eb01-0410-851d-a64ba20cac60
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turbocat
2023-09-22 19:17:33 +00:00
parent 69f5ec5ac7
commit e4362a1edc
7 changed files with 63 additions and 42 deletions
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64
kernel/trunk/boot/bootcode.inc
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@@ -93,6 +93,14 @@ macro _ask_question question,range,variable_to_set
mov [variable_to_set], al
}
clear_status_field:
mov si, space_msg
mov byte [si+80], 0
_setcursor 16,0
call printplain
_setcursor 16,0
ret
boot_read_floppy:
push si
xor si, si
@@ -276,7 +284,6 @@ else
cld
push 0
pop es
; \begin{diamond}[02.12.2005]
; if bootloader sets ax = 'KL', then ds:si points to loader block
cmp ax, 'KL'
jnz @f
@@ -284,8 +291,6 @@ else
mov word [cs:cfgmanager.loader_block+2], ds
mov word [es:BOOT_LO.kernel_restart], kernel_restart_bootblock
@@:
; \end{diamond}[02.12.2005]
; if bootloader sets cx = 'HA' and dx = 'RD', then bx contains identifier of source disk
; (see comment to BOOT_LO.sys_disk and loader_doc.txt)
mov word [es:BOOT_LO.sys_disk], 'r1' ; default value: /rd/1
@@ -420,7 +425,6 @@ sayerr:
loopz @b
in al, 0x60
;;;/diamond today 5.02.2008
; set keyboard typematic rate & delay
mov al, 0xf3
out 0x60, al
@@ -494,7 +498,6 @@ noloaderblock:
call calc_vmodes_table
call check_first_parm ;check and enable cursor_pos
; \begin{diamond}[30.11.2005]
cfgmanager:
; settings:
; a) preboot_graph = graphical mode
@@ -931,20 +934,30 @@ if ~ defined extended_primary_loader
push cs
push .cont
push eax
retf ;call back
retf ;call back
.loadc:
pop eax
.cont:
push cs
pop ds
mov si, space_msg
mov byte [si+80], 0
_setcursor 16,0
call printplain
_setcursor 16,0
push es
les bx, [.loader_block]
cmp byte [es:bx+7], 0 ; get write error flag
pop es
jz .load
call clear_status_field
mov si, write_err_msg
call print
.wait_any_key:
xor ax, ax
int 16h
test ax, ax
jz .wait_any_key
.load:
call clear_status_field
end if
; \end{diamond}[02.12.2005]
; ASK GRAPHICS MODE
@@ -998,37 +1011,38 @@ include '../detect/biosmem.inc'
jne no_sys_on_floppy
mov si, diskload
call print
xor ax, ax ; reset drive
xor dx, dx
xor ax, ax ; reset drive
xor dx, dx ; 1st floppy disk (0)
int 0x13
; do we boot from CD-ROM?
mov ah, 41h
mov bx, 55AAh
xor dx, dx
mov ah, 41h ; check extended mode
mov bx, 55AAh ; test 2 bytes to check that this function is supported
xor dx, dx ; 1st floppy disk (0)
int 0x13
jc .nocd
jc .nocd ; extended mode not supported
cmp bx, 0AA55h
jnz .nocd
mov ah, 48h
jnz .nocd ; extended mode not supported
mov ah, 48h ; extended read drive parameters
push ds
push es
pop ds
mov si, 0xa000
mov word [si], 30
mov word [si], 30 ; size of result buffer
int 0x13
pop ds
jc .nocd
jc .nocd ; error getting parameters
push ds
lds si, [es:si+26]
test byte [ds:si+10], 40h
lds si, [es:si+26] ; pointer to Enhanced Disk Drive (EDD) configuration parameters
test byte [ds:si+10], 40h ; check ATAPI device
pop ds
jz .nocd
; yes - read all floppy by 18 sectors
; TODO: !!!! read only first sector and set variables !!!!!
; ...
; TODO: !!! then read flippy image track by track
mov cx, 0x0001 ; startcyl,startsector
.a1:
push cx dx