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...asm =================================================================== --- syslinux-3.82-440-g6483c80.orig/modules/gfxboot.asm +++ syslinux-3.82-440-g6483c80/modules/gfxboot.asm @@ -968,7 +968,6 @@ msg_missing db 'missing',0 msg_usage db 'Usage: gfxboot.com <bootlogo>',0dh,0ah,0 msg_memory db 'Could not detect available memory size',0dh,0ah,0 msg_bootlogo_toobig db 'bootlogo file too big',0dh,0ah,0 -msg_pxelinux db 'pxelinux is not supported',0dh,0ah,0 msg_unknown_file_size db 'unknown file size',0dh,0ah,0 msg_not_found db ' not...

...error + +apm0101_ok: + mov ax,5307h ; Set Power State (07h) + mov bx,0001h ; All devices power managed by the APM BIOS + mov cx,0003h ; Power state off + int 15h + jnc off + + mov bx, msg_failed + +error: + mov ax,2 + int 22h +off: + ret + +msg_notpresent: db 'APM not present.',0dh,0ah,0 +msg_notsup: db 'APM 1.1+ not supported.',0dh,0ah,0 +msg_pmdisabled: db 'Power management disabled.',0dh,0ah,0 +msg_connect: db 'APM RM interface connect failed.',0dh,0ah,0 +msg_failed: db 'Power off failed.',0dh,0ah,0

...ad_file: mov si,pspCmdArg+1 int 22h jnc gfx_file_read + + mov ax,2 + mov bx,pspCmdArg+1 + int 22h + + mov ax,2 + mov bx,msg_not_found + int 22h stc ret @@ -890,6 +898,7 @@ msg_memory db 'Could not detect availab msg_bootlogo_toobig db 'bootlogo file too big',0dh,0ah,0 msg_pxelinux db 'pxelinux is not supported',0dh,0ah,0 msg_unknown_file_size db 'unknown file size',0dh,0ah,0 +msg_not_found db ' not found',0dh,0ah,0 msg_space db ' ',0 msg_crlf db 0dh,0ah,0

...g + cmp word [label_cnt],0 + ja labels_defined + mov bx,msg_no_labels_defined + mov ax,2 + int 22h + ret + +labels_defined: ; get_gfx_file mov ax,cs add ax,2000h @@ -899,6 +907,7 @@ msg_bootlogo_toobig db 'bootlogo file to msg_pxelinux db 'pxelinux is not supported',0dh,0ah,0 msg_unknown_file_size db 'unknown file size',0dh,0ah,0 msg_not_found db ' not found',0dh,0ah,0 +msg_no_labels_defined db 'No labels defined in config file',0dh,0ah,0 msg_space db ' ',0 msg_crlf db 0dh,0ah,0

...******************** + + absolute 0 +pspInt20: resw 1 +pspNextP: resw 1 + resb 124 +pspCmdLen: resb 1 +pspCmdArg: resb 127 + +;%define DEBUG + + section .text + org 100h + +_start: + mov ax,2 + mov bx, msg_progname + int 22h + + mov ax,2 + mov bx, msg_crlf + int 22h + + push es + mov ax,0ah + mov cl,9 + int 22h + pop es + cmp al,32h + jnz not_pxelinux + + mov dl,0 ; fake drive number + mov cl,11 ; fake sector size 2048 bytes + +not_pxelinux: + mov [derivative_id],al + mov [drivenumber],dl + mov [sectorshift],cl + mov ax,1 + shl ax,cl + mov [sectorsize],ax + mov ax,trackb...

...:01:10.000000000 +0100 @@ -0,0 +1,883 @@ + absolute 0 +pspInt20: resw 1 +pspNextP: resw 1 + resb 124 +pspCmdLen: resb 1 +pspCmdArg: resb 127 + + section .text + org 100h + +_start: + mov ax,2 + mov bx, msg_progname + int 22h + + mov ax,2 + mov bx, msg_crlf + int 22h + + push es + mov ax,0ah + mov cl,9 + int 22h + pop es + cmp al,32h + jnz not_pxelinux + + mov ax,2 + mov bx,msg_pxelinux + int 22h + ret +not_pxelinux: + mov [derivative_id],al + mov [drivenumber],dl + mov [sectorshift],cl + mov ax,1 + shl ax,cl + mov [sectorsize],ax + mov ax,trackbufsize + shr ax,cl + m...

Sensei H. Peter Anvin, I have successfully modified/enhanced memdisk so that one can chainload a local operating system after running diskless FreeDOS. I would like your advice regarding the appropriate interface for invoking this functionality. In addition, I would like to know what steps to take so that you feel comfortable considering including this in the standard syslinux distribution.

...sub rsp, 18h mov ebx, 0FFFFFFFFh cmp edi, 2 jnz loc_100000F29 mov rdi, [rsi+8] ; char * xor r14d, r14d xor esi, esi ; char ** mov edx, 0Ah ; int call _strtol mov r15, rax shl rax, 20h mov rsi, offset __mh_execute_header add rsi, rax sar rsi, 20h ; size_t mov edi, 4 ; size_t...

...x, 0FFFFFFFFh >> cmp edi, 2 >> jnz loc_100000F29 >> mov rdi, [rsi+8] ; char * >> xor r14d, r14d >> xor esi, esi ; char ** >> mov edx, 0Ah ; int >> call _strtol >> mov r15, rax >> shl rax, 20h >> mov rsi, offset __mh_execute_header >> add rsi, rax >> sar rsi, 20h ; siz...

Hi folks, I've got a problem with COMBoot (16 bit) in SYSLINUX 2.06: while the write string call (ax=2, int 22h) works just fine, the open file call (ax=6, int 22h) does nothing at all. Calling that function doesn't modify any register, and doesn't modify the carry flag. I then modified comapi_open in comboot.inc so it sets ax to some value and recompiled SYSLINUX, reinstalled it

...77,9 +882,6 @@ memcmp: ret section .data -label_keyword db 6,'label',0 -default_keyword db 7,'default',0 - msg_progname db 'gfxboot: ',0 msg_config_file db 'Configuration file',0 msg_missing db 'missing',0 @@ -894,6 +896,15 @@ msg_crlf db 0dh,0ah,0 gfx_slash db '/', 0 db0 db 0 +keyword_text_label db 6,'label',0 +keyword_text_default db 7,'default',0 +keywords equ $ + dw keyword_text_label + dw do_label + dw keyword_text_default + dw do_default +keyword_cnt dw ($-keywords)/4 + ; menu entry descriptor...

...b al,'0' + imul ebx,ecx + add ebx,eax + jmp short .loop +.done: + clc +.ret: + pop ecx + pop eax + ret +.err: + stc + jmp short .ret + section .data msg_progname db 'gfxboot: ',0 msg_config_file db 'Configuration file',0 @@ -913,14 +977,18 @@ msg_crlf db 0dh,0ah,0 gfx_slash db '/', 0 db0 db 0 +menu_timeout dd 100 keyword_text_label db 6,'label',0 keyword_text_default db 7,'default',0 +keyword_text_timeout db 7,'timeout',0 keywords equ $ dw keyword_text_label dw do_label dw keyword_text_default d...

...mp edi, 2 >>>> jnz loc_100000F29 >>>> mov rdi, [rsi+8] ; char * >>>> xor r14d, r14d >>>> xor esi, esi ; char ** >>>> mov edx, 0Ah ; int >>>> call _strtol >>>> mov r15, rax >>>> shl rax, 20h >>>> mov rsi, offset __mh_execute_header >>>> add rsi, rax >>>&g...

...nvalid ; 06h - FORMAT TRACK AND SET BAD FLAGS dw Invalid ; 07h - FORMAT DRIVE AT TRACK dw GetParms ; 08h - GET PARAMETERS - dw InitWithParms ; 09h - INITIALIZE CONTROLLER WITH DRIVE PARAMETERS + dw InitWithParms ; 09h - INITIALIZE CONTROLLER WITH + ; DRIVE PARAMETERS dw Invalid ; 0Ah dw Invalid ; 0Bh dw Seek ; 0Ch - SEEK TO CYLINDER diff --git a/memdisk/postprocess.pl b/memdisk/postprocess.pl index f8cba96..fcda478 100755 --- a/memdisk/postprocess.pl +++ b/memdisk/postprocess.pl @@ -12,8 +12,10 @@ ## --------------------------------------------------------------------...

...f0000000000000 PUBLIC _thread_call EXTRN _printf:PROC EXTRN __imp__GetCurrentThreadId at 0:PROC EXTRN __fltused:DWORD ; COMDAT ??_C at _0CG@LBAPCNHJ@?6?$CI2?$CJleu?5?$CFld?5threadid?5?$DN?5?5?$CFld?5seqt@ CONST SEGMENT ??_C at _0CG@LBAPCNHJ@?6?$CI2?$CJleu?5?$CFld?5threadid?5?$DN?5?5?$CFld?5seqt@ DB 0aH DB '(2)leu %ld threadid = %ld seqt=%ld ', 00H ; `string' CONST ENDS ; COMDAT __real at 3ff0000000000000 CONST SEGMENT __real at 3ff0000000000000 DQ 03ff0000000000000r ; 1 ; Function compile flags: /Ogtpy CONST ENDS ; COMDAT _thread_call _TEXT SEGMENT _c$ = 8 ; size = 4 _thread_c...