diff options
Diffstat (limited to 'core/comboot.inc')
| -rw-r--r-- | core/comboot.inc | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/core/comboot.inc b/core/comboot.inc index 7210b8b8..2ff5f33e 100644 --- a/core/comboot.inc +++ b/core/comboot.inc @@ -1047,6 +1047,72 @@ comapi_kbdtable: stc ret +; +; INT 22h AX=001Fh Get current working directory +; +comapi_getcwd: + mov P_ES,cs + mov P_BX,CurrentDirName + clc + ret + +; +; INT 22h AX=0020h Open directory +; +%if IS_SYSLINUX +comapi_opendir: + push ds + mov ds,P_ES + mov si,P_SI + mov di,InitRD + call mangle_name + pop ds + call searchdir + jnz comapi_err ; Didn't find a directory + cmp eax,0 + jz comapi_err ; Found nothing + ;ZF is unset + call alloc_fill_dir + mov P_EAX,eax + mov P_CX,SECTOR_SIZE + mov P_SI,si + clc + ret +%else +comapi_opendir equ comapi_err +%endif + +; +; INT 22h AX=0021h Read directory +; +%if IS_SYSLINUX +comapi_readdir: + mov es,P_ES + mov di,P_DI + mov si,P_SI + call readdir + mov P_EAX,eax + mov P_DL,dl + mov P_EBX,ebx + mov P_SI,si + ret +%else +comapi_readdir equ comapi_err +%endif + +; +; INT 22h AX=0022h Close directory +; +%if IS_SYSLINUX +comapi_closedir: + mov si,P_SI + call close_dir + clc + ret +%else +comapi_closedir equ comapi_err +%endif + section .data %macro int21 2 @@ -1100,6 +1166,10 @@ int22_table: dw comapi_getadv ; 001C get pointer to ADV dw comapi_writeadv ; 001D write ADV to disk dw comapi_kbdtable ; 001E keyboard remapping table + dw comapi_getcwd ; 001F get current working directory + dw comapi_opendir ; 0020 open directory + dw comapi_readdir ; 0021 read directory + dw comapi_closedir ; 0022 close directory int22_count equ ($-int22_table)/2 APIKeyWait db 0 @@ -1124,3 +1194,4 @@ err_comlarge db 'COMBOOT image too large.', CR, LF, 0 alignb 4 DOSErrTramp resd 33 ; Error trampolines ConfigName resb FILENAME_MAX +CurrentDirName resb FILENAME_MAX |