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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/common/_gatimer.asm')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/common/_gatimer.asm | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/common/_gatimer.asm b/board/MAI/bios_emulator/scitech/src/common/_gatimer.asm deleted file mode 100644 index 0194a62f9..000000000 --- a/board/MAI/bios_emulator/scitech/src/common/_gatimer.asm +++ /dev/null @@ -1,248 +0,0 @@ -;**************************************************************************** -;* -;* SciTech Nucleus Graphics Architecture -;* -;* Copyright (C) 1991-1998 SciTech Software, Inc. -;* All rights reserved. -;* -;* ====================================================================== -;* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| -;* | | -;* |This copyrighted computer code contains proprietary technology | -;* |owned by SciTech Software, Inc., located at 505 Wall Street, | -;* |Chico, CA 95928 USA (http://www.scitechsoft.com). | -;* | | -;* |The contents of this file are subject to the SciTech Nucleus | -;* |License; you may *not* use this file or related software except in | -;* |compliance with the License. You may obtain a copy of the License | -;* |at http://www.scitechsoft.com/nucleus-license.txt | -;* | | -;* |Software distributed under the License is distributed on an | -;* |"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | -;* |implied. See the License for the specific language governing | -;* |rights and limitations under the License. | -;* | | -;* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| -;* ====================================================================== -;* -;* Language: 80386 Assembler, NASM or TASM -;* Environment: IBM PC 32 bit Protected Mode. -;* -;* Description: Assembly support functions for the Nucleus library for -;* the high resolution timing support functions provided by -;* the Intel Pentium and compatible processors. -;* -;**************************************************************************** - - IDEAL - -include "scitech.mac" ; Memory model macros - -header _gatimer - -begcodeseg _gatimer - -ifdef USE_NASM -%macro mCPU_ID 0 -db 00Fh,0A2h -%endmacro -else -MACRO mCPU_ID -db 00Fh,0A2h -ENDM -endif - -ifdef USE_NASM -%macro mRDTSC 0 -db 00Fh,031h -%endmacro -else -MACRO mRDTSC -db 00Fh,031h -ENDM -endif - -;---------------------------------------------------------------------------- -; bool _GA_haveCPUID(void) -;---------------------------------------------------------------------------- -; Determines if we have support for the CPUID instruction. -;---------------------------------------------------------------------------- -cprocstart _GA_haveCPUID - - enter_c - pushfd ; Get original EFLAGS - pop eax - mov ecx, eax - xor eax, 200000h ; Flip ID bit in EFLAGS - push eax ; Save new EFLAGS value on stack - popfd ; Replace current EFLAGS value - pushfd ; Get new EFLAGS - pop eax ; Store new EFLAGS in EAX - xor eax, ecx ; Can not toggle ID bit, - jnz @@1 ; Processor=80486 - mov eax,0 ; We dont have CPUID support - jmp @@Done -@@1: mov eax,1 ; We have CPUID support -@@Done: leave_c - ret - -cprocend - -;---------------------------------------------------------------------------- -; uint _GA_getCPUIDFeatures(void) -;---------------------------------------------------------------------------- -; Determines the CPU type using the CPUID instruction. -;---------------------------------------------------------------------------- -cprocstart _GA_getCPUIDFeatures - - enter_c - - xor eax, eax ; Set up for CPUID instruction - mCPU_ID ; Get and save vendor ID - cmp eax, 1 ; Make sure 1 is valid input for CPUID - jl @@Fail ; We dont have the CPUID instruction - xor eax, eax - inc eax - mCPU_ID ; Get family/model/stepping/features - mov eax, edx -@@Done: leave_c - ret - -@@Fail: xor eax,eax - jmp @@Done - -cprocend - -;---------------------------------------------------------------------------- -; void _GA_readTimeStamp(GA_largeInteger *time) -;---------------------------------------------------------------------------- -; Reads the time stamp counter and returns the 64-bit result. -;---------------------------------------------------------------------------- -cprocstart _GA_readTimeStamp - - mRDTSC - mov ecx,[esp+4] ; Access directly without stack frame - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - -;---------------------------------------------------------------------------- -; N_uint32 GA_TimerDifference(GA_largeInteger *a,GA_largeInteger *b) -;---------------------------------------------------------------------------- -; Computes the difference between two 64-bit numbers (a-b) -;---------------------------------------------------------------------------- -cprocstart GA_TimerDifference - - ARG a:DPTR, b:DPTR, t:DPTR - - enter_c - - mov ecx,[a] - mov eax,[ecx] ; EAX := b.low - mov ecx,[b] - sub eax,[ecx] - mov edx,eax ; EDX := low difference - mov ecx,[a] - mov eax,[ecx+4] ; ECX := b.high - mov ecx,[b] - sbb eax,[ecx+4] ; EAX := high difference - mov eax,edx ; Return low part - - leave_c - ret - -cprocend - -; Macro to delay briefly to ensure that enough time has elapsed between -; successive I/O accesses so that the device being accessed can respond -; to both accesses even on a very fast PC. - -ifdef USE_NASM -%macro DELAY_TIMER 0 - jmp short $+2 - jmp short $+2 - jmp short $+2 -%endmacro -else -macro DELAY_TIMER - jmp short $+2 - jmp short $+2 - jmp short $+2 -endm -endif - -;---------------------------------------------------------------------------- -; void _OS_delay8253(N_uint32 microSeconds); -;---------------------------------------------------------------------------- -; Delays for the specified number of microseconds, by directly programming -; the 8253 timer chips. -;---------------------------------------------------------------------------- -cprocstart _OS_delay8253 - - ARG microSec:UINT - - enter_c - -; Start timer 2 counting - - mov _ax,[microSec] ; EAX := count in microseconds - mov ecx,1196 - mul ecx - mov ecx,1000 - div ecx - mov ecx,eax ; ECX := count in timer ticks - in al,61h - or al,1 - out 61h,al - -; Set the timer 2 count to 0 again to start the timing interval. - - mov al,10110100b ; set up to load initial (timer 2) - out 43h,al ; timer count - DELAY_TIMER - sub al,al - out 42h,al ; load count lsb - DELAY_TIMER - out 42h,al ; load count msb - xor di,di ; Allow max 64K loop iterations - -@@LoopStart: - dec di ; This is a guard against the possibility that - jz @@LoopEnd ; someone eg. stopped the timer behind our back. - ; After 64K iterations we bail out no matter what - ; (and hope it wasn't too soon) - mov al,00000000b ; latch timer 0 - out 43h,al - DELAY_TIMER - in al,42h ; least significant byte - DELAY_TIMER - mov ah,al - in al,42h ; most significant byte - xchg ah,al - neg ax ; Convert from countdown remaining - ; to elapsed count - cmp ax,cx ; Has delay expired? - jb @@LoopStart ; No, so loop till done - -; Stop timer 2 from counting -@@LoopEnd: - in al,61H - and al,0FEh - out 61H,al - -; Some programs have a problem if we change the control port; better change it -; to something they expect (mode 3 - square wave generator)... - mov al,0B6h - out 43h,al - - leave_c - ret - -cprocend - -endcodeseg _gatimer - - END - |