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AMISL083.ZIP
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FASTMOUS.ASM
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Assembly Source File
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1992-04-19
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4KB
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132 lines
;-----------------------------------------------------------------------
; FASTMOUS.ASM Public Domain 1992 Ralf Brown
; You may do with this software whatever you want, but
; common courtesy dictates that you not remove my name
; from it.
;
; Convert slow (on some systems) hardware reset mouse call into a fast
; software reset call. This is a demonstration program to show just
; how small a useful program can be made and still be fully compliant
; with the alternate multiplex interrupt specification v3.4. FASTMOUS
; contains just 128 bytes of resident code and data.
;
; Version 0.80
; LastEdit: 4/19/92
;-----------------------------------------------------------------------
__TINY__ equ 1 ; using Tiny model
INCLUDE AMIS.MAC
;-----------------------------------------------------------------------
;
VERSION_NUM equ 0050h ; v0.80
VERSION_STR equ "0.80"
;-----------------------------------------------------------------------
; Declare our segments in the order we want them in the executable.
;
_TEXT SEGMENT PUBLIC BYTE 'CODE'
_TEXT ENDS
TSRcode@
TSRcodeEnd@
;-----------------------------------------------------------------------
; Put the resident code into its own segment so that all the offsets are
; proper for the new location after copying it into a UMB or down into
; the PSP.
;
TSRcode@
start_TSRcode label byte
;-----------------------------------------------------------------------
; Declare the interrupt vectors hooked by the program, then set up the
; Alternate Multiplex Interrupt Spec handler
;
HOOKED_INTS 2Dh,33h ; it isn't actually necessary to list 2Dh
ALTMPX 'Ralf B','FASTMOUS',VERSION_NUM
;-----------------------------------------------------------------------
; Now the meat of the resident portion, the mouse interrupt handler.
; We can save one byte by specifying the hardware reset handler set up by
; the ALTMPX macro above
;
ISP_HEADER 33h,hw_reset_2Dh
or ax,ax ; hardware reset call?
jne use_old_int33 ; skip if not
push ds
mov ds,ax ; DS <- 0000h
test byte ptr ds:[417h],13h ; shift or scroll lock pressed?
pop ds
jnz use_old_int33 ; skip if yes
mov al,21h ; do software reset instead
use_old_int33:
jmp ORIG_INT33h
resident_code_size equ offset $
TSRcodeEnd@
;-----------------------------------------------------------------------
_TEXT SEGMENT 'CODE'
ASSUME cs:_TEXT,ds:_TEXT,es:_TEXT,ss:_TEXT
ORG 100h
FASTMOUSE:
DISPLAY_STRING banner
CHECK_DOS_VER 2,00
mov bx,1000h ; set memory block to 64K
mov ah,4Ah
int 21h
mov si,81h ; SI -> command line
cld ; ensure proper direction for string ops
cmdline_loop:
lodsb
cmp al,' ' ; skip blanks and tabs on commandline
je cmdline_loop
cmp al,9
je cmdline_loop
and al,0DFh ; force to uppercase
cmp al,'R'
je removing
installing:
;
; place any necessary pre-initialization here
;
INSTALL_TSR <offset _TEXT:start_TSRcode>,RELBYTE,resident_code_size,BYTE,,BEST,TOPMEM,inst_notify,already_installed
removing:
UNINSTALL <offset _TEXT:start_TSRcode>,RELBYTE,cant_uninstall
push cs
pop ds
DISPLAY_STRING uninstalled_msg
mov ax,4C00h
int 21h
cant_uninstall:
mov dx,offset _TEXT:cant_remove_msg
jmp short exit_with_error
already_installed:
mov dx,offset _TEXT:already_inst_msg
exit_with_error:
mov ah,9
int 21h
mov ax,4C01h
int 21h
inst_notify:
DISPLAY_STRING installed_msg
ret
banner db 'FASTMOUS v',VERSION_STR,' Public Domain 1992 Ralf Brown '
db '[Type "FASTMOUS R" to remove]',13,10,"$"
installed_msg db "Installed.",13,10,"$"
already_inst_msg db "Already installed.",13,10,"$"
cant_remove_msg db "Can't remove from memory.",13,10,"$"
uninstalled_msg db "Removed.",13,10,"$"
_TEXT ENDS
end FASTMOUSE