440 lines
9.6 KiB
NASM
440 lines
9.6 KiB
NASM
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;
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; LibInit.asm library stub to do local init for a Dynamic linked library
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;
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; NOTE!!!! link this MODULE first or you will be sorry!!!!
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;
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?PLM=1 ; pascal call convention
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?WIN=0 ; Windows prolog/epilog code
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?DF=1
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PMODE=1
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.286
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.xlist
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include cmacros.inc
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include windows.inc
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include sysinfo.inc
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include mmddk.inc
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include mmsystem.inc
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include timer.inc
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;include vtdapi.inc
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.list
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.list
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sBegin Data
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;
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; Stuff needed to avoid the C runtime coming in
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;
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; also known as "MAGIC THAT SAVED ME" - Glenn Steffler 2/7/90
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;
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; Do not remove!!
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;
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DD 0 ; So null pointers get 0
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maxRsrvPtrs = 5
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DW maxRsrvPtrs
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usedRsrvPtrs = 0
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labelDP <PUBLIC,rsrvptrs>
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DefRsrvPtr MACRO name
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globalW name,0
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usedRsrvPtrs = usedRsrvPtrs + 1
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ENDM
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DefRsrvPtr pLocalHeap ; Local heap pointer
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DefRsrvPtr pAtomTable ; Atom table pointer
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DefRsrvPtr pStackTop ; top of stack
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DefRsrvPtr pStackMin ; minimum value of SP
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DefRsrvPtr pStackBot ; bottom of stack
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if maxRsrvPtrs-usedRsrvPtrs
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DW maxRsrvPtrs-usedRsrvPtrs DUP (0)
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endif
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public __acrtused
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__acrtused = 1
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sEnd Data
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;
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;
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; END of nasty stuff...
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;
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externA WinFlags
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externFP LocalInit
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externFP Disable286
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externFP Enable286
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externW wMaxResolution
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externW wMinPeriod
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; here lies the global data
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sBegin Data
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public wEnabled
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wEnabled dw 0 ; enable = 1 ;disable = 0
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public PS2_MCA
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ifdef NEC_98
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PS2_MCA db 0 ; Micro Channel Flag
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public bClockFlag ; save machine clock
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bClockFlag db 0 ; 5Mhz = 0 ; 8Mhz = other
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else ; NEC_98
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PS2_MCA db ? ; Micro Channel Flag
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endif ; NEC_98
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sEnd Data
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assumes es,nothing
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sBegin CodeInit
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assumes cs,CodeInit
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assumes ds,Data
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;
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; Library unload function
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;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Disable routine is same as WEP
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cProc WEP,<FAR,PUBLIC>,<>
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; parmW silly_param
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cBegin nogen
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errn$ Disable
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cEnd nogen
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cProc Disable,<FAR,PUBLIC>,<>
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; parmW silly_param
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cBegin nogen
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push ds
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mov ax,DGROUP ; set up DS==DGROUP for exported funcs
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mov ds,ax
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assumes ds,Data
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xor ax,ax ; return value = no error
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cmp wEnabled,ax ; Q: enabled ?
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jz dis_done ; N: exit
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mov wEnabled,ax ; disabled now
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mov ax,WinFlags
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test ax,WF_WIN386
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jnz dis_386
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; running under win286
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dis_286:
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call Disable286
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jmp dis_done
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; running under win386
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dis_386:
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call Disable286
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dis_done:
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pop ds
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ret 2
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cEnd nogen
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;
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; Library Enable function
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;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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cProc Enable,<FAR,PUBLIC>,<>
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; parmW silly_param
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cBegin nogen
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mov ax,wEnabled
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or ax,ax ; Q: already enabled ?
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jnz enable_done ; Y: exit
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inc wEnabled ; mark as being enabled
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ifdef NEC_98
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;
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; Get system clock
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;
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mov ax,0002h
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mov bx,0040h ; get segment addres
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; make descriptor(real mode segment)
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; return the segment descriptor
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; in the case of exist the appointed segment descriptor already
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; (not make sure repeatedly)
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int 31h
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jc error_exit ; in the case of failed ->jmp
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push es
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mov es,ax
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mov al,byte ptr es:[101h] ; get system info
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and al,80h
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mov byte ptr bClockFlag,al ; save clock
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pop es
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endif ; NEC_98
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mov ax,WinFlags
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test ax,WF_WIN386
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jnz enable_386
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; running under win286
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enable_286:
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call Enable286
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jmp enable_done
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; running under win386
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enable_386:
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call Enable286
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enable_done:
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ret 2
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ifdef NEC_98
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error_exit:
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dec wEnabled ; mark as being enabled
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xor ax,ax
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ret 2
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endif ; NEC_98
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cEnd nogen
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;
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; Library entry point
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;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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public LibInit
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LibInit proc far
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; CX = size of heap
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; DI = module handle
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; DS = automatic data segment
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; ES:SI = address of command line (not used)
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jcxz lib_heapok ; heap size zero? jump over unneeded LocalInit call
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cCall LocalInit,<ds,ax,cx> ; dataseg, 0, heapsize
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or ax,ax
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jnz lib_heapok ; if heap set continue on
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lib_error:
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xor ax,ax
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ret ; return FALSE (ax = 0) -- couldn't init
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lib_heapok:
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mov ax,WinFlags
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test ax,WF_WIN386
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jnz lib_386
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; running under win286
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lib_286:
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call Lib286Init
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jmp lib_realdone ; win 286 will enable timer on first event request
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; running under win386
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lib_386:
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call Lib286Init
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lib_realdone:
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ret
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LibInit endp
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sEnd
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;
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; Win 386 timer VTD code for initialization, and removal
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;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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externFP GetVersion ; in KERNEL
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externFP MessageBox ; in USER
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externFP LoadString ; in USER
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sBegin CodeInit
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assumes cs,CodeInit
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assumes ds,Data
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;externNP VTDAPI_GetEntryPt
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; Assumes DI contains module handle
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cProc WarningMessage <NEAR,PASCAL> <>
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LocalV aszErrorTitle, 32
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LocalV aszErrorMsg, 256
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cBegin
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lea ax, WORD PTR aszErrorTitle
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cCall LoadString, <di, IDS_ERRORTITLE, ss, ax, 32>
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lea ax, WORD PTR aszErrorMsg
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cCall LoadString, <di, IDS_ERRORTEXT, ss, ax, 256>
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lea ax, WORD PTR aszErrorTitle
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lea bx, WORD PTR aszErrorMsg
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cCall MessageBox, <NULL, ss, bx, ss, ax, MB_SYSTEMMODAL+MB_OK+MB_ICONHAND>
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cEnd
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if 0
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Lib386Init proc near
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call VTDAPI_GetEntryPt ; this will return 0 if the VxD is not loaded
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or ax,ax
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jnz Lib386InitOk
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ifndef NEC_98
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DOUT <TIMER: *** unable to find vtdapi.386 ***>
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endif ; NEC_98
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;
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; warn the USER that we can't find our VxD, under windows 3.0
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; we can't bring up a message box, so only do this in win 3.1
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;
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cCall GetVersion
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xchg al,ah
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cmp ax,030Ah
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jb Lib386InitFail
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cCall WarningMessage,<>
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Lib386InitFail:
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xor ax,ax
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Lib386InitOk:
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ret
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Lib386Init endp
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endif
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Disable386 proc near
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errn$ Enable386 ; fall through
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Disable386 endp
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Enable386 proc near
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mov ax,1 ; nothing to do
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ret
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Enable386 endp
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sEnd Code386
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;
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; Win 286 timer drv code for initialization, and removal
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;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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externW Events
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externFP tddISR ; in local.asm
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externFP GlobalWire ; in KERNEL
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externFP GlobalPageLock ; in KERNEL
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sBegin CodeInit
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assumes cs,CodeInit
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assumes ds,Data
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Lib286Init proc near
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; get the system configuration
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;
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; the FIXED_286 segment is not loaded, load it and pagelock it.
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;
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mov dx,seg tddISR ; get the 286 code segment
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mov es,dx
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mov ax,es:[0] ; load it!
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cCall GlobalWire, <dx> ; get it low in memory
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cCall GlobalPageLock, <dx> ; and nail it down!
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ifndef NEC_98
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mov PS2_MCA,0 ; Initialize PS2_MCA = FALSE
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stc ; Set this in case BIOS doesn't
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mov ah,GetSystemConfig
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int 15h
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jc Lib286Init_NoMicroChannel ; Successful call?
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or ah,ah ; Valid return?
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jnz Lib286Init_NoMicroChannel
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test es:[bx.SD_feature1],SF1_MicroChnPresent
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jz Lib286Init_NoMicroChannel
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inc PS2_MCA ; PS2_MCA = TRUE
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endif ; NEC_98
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Lib286Init_NoMicroChannel:
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push di
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push ds
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pop es
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mov di,DataOFFSET Events ; ES:DI --> Events
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xor ax,ax
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mov cx,(MAXEVENTS * SizeEvent)/2
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rep stosw ; zero out event structures.
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; set up one event as the standard call-back routine for the
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; BIOS timer service
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;
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ifdef NEC_98
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mov ax,0002h
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mov bx,0040h
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int 31h
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jc error_init
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push es
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mov es,ax
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test byte ptr es:[101h],80h
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pop es
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mov cx,0f000h
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jz @f
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mov cx,0c300h
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@@:
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xor bx,bx
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else ; NEC_98
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xor bx,bx ; BX:CX = 64k
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xor cx,cx
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inc bx
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endif ; NEC_98
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mov di,DataOFFSET Events ; DS:DI --> Events
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mov [di].evTime.lo,cx ; Program next at ~= 55ms
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mov [di].evTime.hi,bx ; standard 18.2 times per second event
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mov [di].evDelay.lo,cx ; First event will be set off
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mov [di].evDelay.hi,bx ; at 55ms (65536 ticks)
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mov [di].evResolution,TDD_MINRESOLUTION ; Allow 55ms either way
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mov [di].evFlags,TIME_BIOSEVENT+TIME_PERIODIC
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mov ax,WinFlags
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test ax,WF_CPU286
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jz @f
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mov wMaxResolution,TDD_MAX286RESOLUTION
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mov wMinPeriod,TDD_MIN286PERIOD
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@@:
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ifdef NEC_98
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mov ax,0001h
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else ; NEC_98
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mov ax,bx ; Return TRUE
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endif ; NEC_98
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mov [di].evID,ax ; enable event
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|
|
||
|
|
pop di
|
||
|
|
ret
|
||
|
|
|
||
|
|
ifdef NEC_98
|
||
|
|
error_init:
|
||
|
|
xor ax,ax
|
||
|
|
pop di
|
||
|
|
ret
|
||
|
|
endif ; NEC_98
|
||
|
|
|
||
|
|
Lib286Init endp
|
||
|
|
|
||
|
|
sEnd
|
||
|
|
|
||
|
|
end LibInit
|