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AltLeftShift EQU 10AltRightShift EQU 9CtrlLeftShift EQU 5CtrlRightShift EQU 4CtrlAlt EQU 12
caps_bit equ 01000000bnums_bit equ 00100000b
NUMKBTONOI EQU 29NUMKBDIAL EQU 9NUMSEMICODES EQU 122NUMKBCODES EQU 102ISWINDOWSNT EQU 3205H
ROM_BIOS_DATA SEGMENT AT 40H ;BIOS statuses held here, also kb buffer ORG 17h bios_kbd_stat db ? ;keyboard status byte ORG 1AH HEAD DW ? ;Unread chars go from Head to Tail TAIL DW ? BUFFER DW 16 DUP (?) ;The buffer itself BUFFER_END LABEL WORD
ROM_BIOS_DATA ENDS
CODE SEGMENT PARA PUBLIC 'CODE' ASSUME CS:CODE ORG 100HBEGIN: JMP INITIALIZEMYSIG DB 'G.Kozyrakis'
NEW_INT09H PROC NEAR ;The keyboard interrupt will now come here. ASSUME CS:CODE PUSH AX ;Save the used registers for good form PUSH BX PUSH CX PUSH DX PUSH DI PUSH SI PUSH DS PUSH ES PUSHF ;First, call old keyboard interrupt CALL OLD_INT09H CMP CS:[CHECKFLAG],1 JNE JEXIT CLI ASSUME DS:ROM_BIOS_DATA ;Examine the char just put in MOV BX,ROM_BIOS_DATA MOV DS,BX MOV BX,TAIL ;Point to current tail MOV CL,Bios_kbd_stat MOV CH,CL AND CH,1FH AND CL,0Fh CMP CL,AltRightShift JNE NOGREEKSWITCH MOV GrFlag,AltRightShift MOV SemiFlag,0 JMP SHORT STARTNOGREEKSWITCH: CMP CL,AltLeftShift JNE CHKSEMI MOV GrFlag,0 MOV SemiFlag,0 JMP SHORT START
CHKSEMI: MOV CL,Bios_kbd_stat AND CL,CtrlLeftShift CMP CL,CtrlLeftShift JNE STARTSemiGr: XOR SemiFlag,CtrlLeftShift
START: CMP BX,HEAD ;If at head, kbd int has deleted char JE JEXIT ;So leave SUB BX,2 ;Point to just read in character CMP BX,OFFSET BUFFER ;Did we undershoot buffer? JAE NO_WRAP ;Nope MOV BX,OFFSET BUFFER_END ;Yes -- move to buffer top SUB BX,2 ;Point to just read in characterNO_WRAP: MOV DX, [BX] ;** Typed character in DX now ** cmp DL,32 jne NOTOGGLE mov CL,CH and CL,0Fh cmp CL,CtrlAlt jne NOTOGGLE xor GrFlag,AltRightShift MOV SemiFlag,0 MOV TAIL,BX ;take tono out of kbr buffer JMP EXITNOTOGGLE: TEST CH,10h JZ NOSCROLL cmp dh,7ah ja NOSCROLL cmp dh,78h jb NOSCROLL push es push ds mov ax,CS mov es,ax mov ds,ax push bx mov al,dh sub al,77h CALL ChangeCP pop bx pop ds pop es MOV TAIL,BX ;take tono out of kbr buffer JMP EXITNOSCROLL: MOV SI,KBOffset ADD SI,(NUMKBTONOI+NUMKBDIAL)*2 ;Semicodes CMP SemiFlag,CtrlLeftShift JE GREEKS ADD SI,NUMSEMICODES*2 ;KBCodes CMP GrFlag,AltRightShift JE GREEKSJEXIT: JMP EXITGREEKS: CMP ToneStat,0 JE CHKTN MOV SI,KBOffset ;KBTONOI CMP ToneStat,22h JNE TCNT ADD SI,NUMKBTONOI*2 ;KBDIALTCNT: CMP DX,CS:[SI] ;Compare to first key JE FOUNDONE ;yes ADD SI,4 ;Point to next key CMP CS:[SI],0FFFFH ;check for end; JNE TCNT ;No continue with next table entry CMP ToneStat,0 JE NoTonos MOV TAIL,BXNoTonos: MOV ToneStat,0 MOV TAIL,BX
CHKTN: CMP DH,27H ;is it a tonos JNE NEXT
ISTONOS: MOV ToneStat,27h ;yes MOV TAIL,BX ;take tono out of kbr buffer JMP SHORT EXITNEXT: CMP DH,28H ;is it dialytika JNE CONT MOV ToneStat,22h MOV TAIL,BX ;take dialytika out of kbr buffer JMP SHORT EXIT
CONT: CMP DX,CS:[SI] ;Compare to first key JE FOUNDONE ;yes ADD SI,4 ;Point to next key CMP CS:[SI],0FFFFH ;check for end; JNE CONT ;No continue with next table entry
JMP SHORT EXIT ;No keys matched. Jump Out.FOUNDONE: MOV DX,CS:[SI+2] MOV [BX],DX MOV ToneStat,0EXIT: STI PUSH BP MOV AH,03 INT 10H CMP CH,CL JAE NO_CURSOR MOV CX,CURSOR1 XOR CH,CH CMP SemiFlag,0 JNE SET_CURSOR MOV CX,CURSOR1 CMP GRFlag,0 JNE SET_CURSOR MOV CX,CURSOR0SET_CURSOR: MOV AH,1 INT 10hNO_CURSOR: POP BP POP ES ;Do the Pops of all registers. POP DS POP SI POP DI POP DX POP CX POP BX POP AX IRET ;An interrupt needs an IRET
NEW_INT09H ENDP
ChangeCP PROC NEAR CLI Mov ES:[KBOffset],OFFSET ES:[TAB928] CMP AL,3 JE ChangeAll Mov ES:[KBOffset],OFFSET ES:[TAB869] CMP AL,2 JE ChangeAll Mov ES:[KBOffset],OFFSET ES:[TAB737] CMP AL,1 JNE NOCHCPChangeAll: MOV CS:[CPTable],ALNOCHCP: STI RETChangeCP ENDP
;* Multiplex - Handler for Interrupt 2Fh (Multiplex Interrupt). Checks;* AH for this TSR's identity number. If no match (indicating call is;* not intended for this TSR), Multiplex passes control to the previous;* Interrupt 2Fh handler.;*;* Params: AH = Handler identity number;* AL = Function number 0-2;*;* Return: AL = 0FFh (function 0);* "GK" in BX (function 0);* ES = Current CS (function 0);* DH = Greek State for function 1 ( 9 or 10);* DL = Code Page (1:=737 2:=869 3:=928) for function 2Multiplex PROC FAR
.IF ah != 0CCh ; If this handler not requested, jmp cs:MULTEX_ISR ; pass control to old Int 2Fh .ENDIF ; handler push cs pop es
.IF al == 0 ; If function 0 (verify presence), mov al, 0FFh ; AL = 0FFh, mov bx, "GK" mov dh, CS:[GRFlag] mov dl, CS:[CPTable] .ELSEIF al == 1 mov CS:[GRFlag],dh .ELSEIF al == 2 mov al,dl push ds push cs pop ds CALL ChangeCP pop ds .ENDIF ; set ES:DI = far address
iret
Multiplex ENDP
BIOS_ISR LABEL DWORDOLD_INT09H DD ? ;Location of old kbd interruptMULTEX_ISR LABEL DWORDOLD_INT2FH DD ? ;Location of old multiplex interruptToneStat DB 0 ;Set to 1 when tonos is pressedGrFlag DB 0SemiFlag DB 0CURSOR0 DW 0B0CHCURSOR1 DW 070CHCHECKFLAG DB 1CPTable DB 0OS_Ver DW 0KBOffset DW OFFSET TAB737
TAB737 dw 1E61H, 1EE1H ; a Tonoi dw 1265H, 12E2H ; e dw 2368H, 23E3H ; h dw 1769H, 17E5H ; i dw 186FH, 18E6H ; o dw 1579H, 15E7H ; y dw 2F76H, 2FE9H ; v DW 1e41H, 1EEAH ; A dw 1245H, 12EBH ; E DW 2348H, 23ECH ; H DW 1749H, 17EDH ; I DW 184fH, 18EEH ; O DW 1559H, 15EFH ; Y DW 2f56H, 00F0H ; V dw 0FFFFHKBDIAL dw 1769H, 17E4H ; i dw 1579H, 15E8H ; y dw 1749H, 1749H DW 1559H, 1559H dw 0FFFFH
SEMICODES dw 3b00H, 3bC9H ; � F1 dw 3c00H, 3cBBH ; � F2 dw 3e00H, 3eC8H ; � F3 dw 3d00H, 3dBCH ; � F4 dw 3f00H, 3fCDH ; � F5 dw 4000H, 40BAH ; � F6 dw 4100H, 41CCH ; � F7 dw 4200H, 42B9H ; � F8 dw 4300H, 43CBH ; � F9 dw 4400H, 44CAH ; � F10 dw 5400H, 54DAH ; � shift+F1 dw 5500H, 55BFH ; � dw 5700H, 57C0H ; � dw 5600H, 56D9H ; � dw 5800H, 58C4H ; � dw 5900H, 59B3H ; � dw 5a00H, 5aC3H ; � dw 5b00H, 5bB4H ; � dw 5c00H, 5cC2H ; � dw 5d00H, 5dC1H ; � shift+F10 dw 6200H, 62CEH ; � dw 6C00H, 6CC5H ; � dw 1000h, 10DBH ; � alt +Q dw 1100h, 11B0H ; � alt +E dw 1200h, 12B1H ; � dw 1300h, 13B2H ; � dw 1400h, 14DCH ; � dw 1500h, 15DFH ; �
dw 6F00H, 6FB5H ; � dw 6500H, 65B6H ; � dw 5f00H, 5fB7H ; � dw 6900H, 69B8H ; � dw 6000H, 60BDH ; � dw 6A00H, 6ABEH ; � dw 6E00H, 6EC6H ; � dw 6400H, 64C7H ; � dw 6700H, 67CFH ; � ctrl +F10 dw 7100H, 71D0H ; � alt +F10 dw 6600H, 66D1H ; � dw 7000H, 70D2H ; � dw 6100H, 61D3H ; � dw 6B00H, 6BD4H ; � dw 6800H, 68D5H ; � alt +F1 dw 5e00H, 5eD6H ; � ctrl +F1 dw 6300H, 63D7H ; � dw 6D00H, 6DD8H ; � dw 1600h, 16DDH ; � dw 1700h, 17DEH ; � dw 7800h, 78F1H ; � alt +1 dw 7A00H, 7AF2H ; � dw 7900H, 79F3H ; � alt +2 dw 1800h, 18F4H ; � dw 1900h, 19F5H ; � alt +P dw 7B00H, 7BF6H ; � dw 7C00H, 7CF7H ; � dw 7D00H, 7DF8H ; � dw 7E00H, 7EF9H ; � dw 7F00H, 7FFBH ; � dw 8000H, 80FDH ; � dw 8100H, 81FCH ; � dw 8200H, 82FEH ; � alt +-
KBCODES dw 1E61H, 1898H ; a dw 3062H, 3099H ; b dw 2267H, 229AH ; g dw 2064H, 209BH ; d dw 1265H, 129CH ; e dw 2C7AH, 2C9DH ; z dw 2368H, 239EH ; h dw 1675H, 169FH ; u dw 1769H, 17A0H ; i dw 256BH, 25A1H ; k dw 266CH, 26A2H ; l dw 326DH, 32A3H ; m dw 316EH, 31A4H ; n dw 246AH, 24A5H ; j dw 186FH, 18A6H ; o dw 1970H, 19A7H ; p dw 1372H, 13A8H ; r dw 1F73H, 1FA9H ; s dw 1474H, 14ABH ; t dw 1579H, 15ACH ; y dw 2166H, 21ADH ; f dw 2D78H, 2DAEH ; x dw 2E63H, 2EAFH ; c dw 2F76H, 00E0H ; v dw 1177H, 11AAH ; w dw 1E41H, 1E80H ; A dw 3042H, 3081H ; B dw 2247H, 2282H ; G dw 2044H, 2083H ; D dw 1245H, 1284H ; E dw 2C5AH, 2C85H ; Z dw 2348H, 2386H ; H dw 1655H, 1687H ; U dw 1749H, 1788H ; I dw 254BH, 2589H ; K dw 264CH, 268AH ; L dw 324DH, 328BH ; M dw 314EH, 318CH ; N dw 244AH, 248DH ; J dw 184FH, 188EH ; O dw 1950H, 198FH ; P dw 1352H, 1390H ; R dw 1F53H, 1F91H ; S dw 1454H, 1492H ; T dw 1559H, 1593H ; Y dw 2146H, 2194H ; F dw 2D58H, 2D95H ; X dw 2E43H, 2E96H ; C dw 2F56H, 2F97H ; V dw 1157H, 117eH ; w DW 0FFFFH
TAB869 dw 1E61H, 1E9BH ; a dw 1265H, 129DH ; e dw 2368H, 239EH ; h dw 1769H, 179FH ; i dw 186FH, 18A2H ; o dw 1579H, 15A3H ; y dw 2F76H, 2FFDH ; v DW 1e41H, 1E86H ; A dw 1245H, 128DH ; E DW 2348H, 238FH ; H DW 1749H, 1790H ; I DW 184fH, 1892H ; O DW 1559H, 1595H ; Y DW 2f56H, 2F98H ; V dw 0FFFFH dw 1769H, 17A0H ; i dw 1579H, 15FBH ; y dw 1749H, 17ADH ; I DW 1559H, 15D1H ; Y dw 0FFFFH dw 3b00H, 3bC9H ; � F1 dw 3c00H, 3cBBH ; � F2 dw 3e00H, 3eC8H ; � F3 dw 3d00H, 3dBCH ; � F4 dw 3f00H, 3fCDH ; � F5 dw 4000H, 40BAH ; � F6 dw 4100H, 41CCH ; � F7 dw 4200H, 42B9H ; � F8 dw 4300H, 43CBH ; � F9 dw 4400H, 44CAH ; � F10 dw 5400H, 54DAH ; � shift+F1 dw 5500H, 55BFH ; � dw 5700H, 57C0H ; � dw 5600H, 56D9H ; � dw 5800H, 58C4H ; � dw 5900H, 59B3H ; � dw 5a00H, 5aC3H ; � dw 5b00H, 5bB4H ; � dw 5c00H, 5cC2H ; � dw 5d00H, 5dC1H ; � shift+F10 dw 6200H, 62CEH ; � dw 6C00H, 6CC5H ; � dw 1000h, 10DBH ; � alt +Q dw 1100h, 11B0H ; � alt +E dw 1200h, 12B1H ; � dw 1300h, 13B2H ; � dw 1400h, 14DCH ; � dw 1500h, 15DFH ; � dw 6F00H, 6FABH ; � dw 6500H, 65AEH ; � dw 5f00H, 5fAFH ; � dw 6900H, 69B8H ; � dw 6000H, 60BDH ; � dw 6A00H, 6ABEH ; � dw 6E00H, 6EC6H ; � dw 6400H, 64C7H ; � dw 6700H, 67CFH ; � ctrl +F10 dw 7100H, 71D0H ; � alt +F10 dw 6600H, 66D1H ; � dw 7000H, 70D2H ; � dw 6100H, 61D3H ; � dw 6B00H, 6BD4H ; � dw 6800H, 68D5H ; � alt +F1 dw 5e00H, 5eD6H ; � ctrl +F1 dw 6300H, 63D7H ; � dw 6D00H, 6DD8H ; � dw 1600h, 16DDH ; � dw 1700h, 17DEH ; � dw 7800h, 78AEH ; � alt +1 dw 7A00H, 7AABH ; � dw 7900H, 79AFH ; � alt +2 dw 1800h, 18F0H ; � dw 1900h, 19F1H ; � alt +P dw 7B00H, 7BF7H ; � dw 7C00H, 7CF5H ; � dw 7D00H, 7DF8H ; � dw 7E00H, 7EF9H ; � dw 7F00H, 7FFBH ; � dw 8000H, 80FDH ; � dw 8100H, 81FCH ; � dw 8200H, 82FEH ; � alt +- dw 1E61H, 18D6H ; a dw 3062H, 30D7H ; b dw 2267H, 22D8H ; g dw 2064H, 20DDH ; d dw 1265H, 12DEH ; e dw 2C7AH, 00E0H ; z dw 2368H, 23E1H ; h dw 1675H, 16E2H ; u dw 1769H, 17E3H ; i dw 256BH, 25E4H ; k dw 266CH, 26E5H ; l dw 326DH, 32E6H ; m dw 316EH, 31E7H ; n dw 246AH, 24E8H ; j dw 186FH, 18E9H ; o dw 1970H, 19EAH ; p dw 1372H, 13EBH ; r dw 1F73H, 1FECH ; s dw 1474H, 14EEH ; t dw 1579H, 15F2H ; y dw 2166H, 21F3H ; f dw 2D78H, 2DF4H ; x dw 2E63H, 2EF6H ; c dw 2F76H, 2FFAH ; v dw 1177H, 11EDH ; w dw 1E41H, 1EA4H ; A dw 3042H, 30A5H ; B dw 2247H, 22A6H ; G dw 2044H, 20A7H ; D dw 1245H, 12A8H ; E dw 2C5AH, 2CA9H ; Z dw 2348H, 23AAH ; H dw 1655H, 16ACH ; U dw 1749H, 17ADH ; I dw 254BH, 25B5H ; K dw 264CH, 26B6H ; L dw 324DH, 32B7H ; M dw 314EH, 31B8H ; N dw 244AH, 24BDH ; J dw 184FH, 18BEH ; O dw 1950H, 19C6H ; P dw 1352H, 13C7H ; R dw 1F53H, 1FCFH ; S dw 1454H, 14D0H ; T dw 1559H, 15D1H ; Y dw 2146H, 21D2H ; F dw 2D58H, 2DD3H ; X dw 2E43H, 2ED4H ; C dw 2F56H, 2FD5H ; V dw 1157H, 117eH ; w dw 0FFFFH
TAB928 dw 1E61H, 1EDCH ; a dw 1265H, 12DDH ; e dw 2368H, 23DEH ; h dw 1769H, 17DFH ; i dw 186FH, 18FCH ; o dw 1579H, 15FDH ; y dw 2F76H, 2FFEH ; v DW 1e41H, 1EB6H ; A dw 1245H, 12B8H ; E DW 2348H, 23B9H ; H DW 1749H, 17BAH ; I DW 184fH, 18BCH ; O DW 1559H, 15BEH ; Y DW 2f56H, 2FBFH ; V dw 0FFFFH dw 1769H, 17FAH ; i dw 1579H, 15FBH ; y dw 1749H, 17DAH ; I DW 1559H, 15DBH ; Y dw 0FFFFH dw 3b00H, 3b91H ; � F1 dw 3c00H, 3c87H ; � F2 dw 3e00H, 3e90H ; � F3 dw 3d00H, 3d88H ; � F4 dw 3f00H, 3f95H ; � F5 dw 4000H, 4086H ; � F6 dw 4100H, 4194H ; � F7 dw 4200H, 4285H ; � F8 dw 4300H, 4393H ; � F9 dw 4400H, 4492H ; � F10 dw 5400H, 5498H ; � shift+F1 dw 5500H, 5589H ; � dw 5700H, 578AH ; � dw 5600H, 5697H ; � dw 5800H, 588EH ; � dw 5900H, 5983H ; � dw 5a00H, 5a8dH ; � dw 5b00H, 5b84H ; � dw 5c00H, 5c8cH ; � dw 5d00H, 5d8bH ; � shift+F10 dw 6200H, 6296H ; � dw 6C00H, 6C8fH ; � dw 1000h, 1099H ; � alt +Q dw 1100h, 1180H ; � alt +E dw 1200h, 1281H ; � dw 1300h, 1382H ; � dw 1400h, 149aH ; � dw 1600h, 169bH ; � ; differ in other CPs dw 6F00H, 6F00H ; � dw 6500H, 6500H ; � dw 5f00H, 5f00H ; � dw 6900H, 6900H ; � dw 6000H, 6000H ; � dw 6A00H, 6A00H ; � dw 6E00H, 6E00H ; � dw 6400H, 6400H ; � dw 6700H, 6700H ; � ctrl +F10 dw 7100H, 7100H ; � alt +F10 dw 6600H, 6600H ; � dw 7000H, 7000H ; � dw 6100H, 6100H ; � dw 6B00H, 6B00H ; � dw 6800H, 6800H ; � alt +F1 dw 5e00H, 5e00H ; � ctrl +F1 dw 6300H, 6300H ; � dw 2b00H, 00a7H ; � dw 1500h, 00e0H ; � dw 1700h, 17c0H ; � dw 7800h, 78B1H ; � alt +1 dw 7A00H, 7AABH ; � dw 7900H, 79BBH ; � alt +2 dw 1800h, 18a7H ; � dw 1900h, 19a9H ; � alt +P dw 7B00H, 7BF6H ; � dw 7C00H, 7CF7H ; � dw 7D00H, 7Db0H ; � dw 7E00H, 7Eb7H ; � dw 7F00H, 7F9cH ; � dw 8000H, 80b2H ; � dw 8100H, 81b3H ; � dw 8200H, 82bdH ; � alt +-
dw 1E61H, 18E1H ; a dw 3062H, 30E2H ; b dw 2267H, 22E3H ; g dw 2064H, 20E4H ; d dw 1265H, 12E5H ; e dw 2C7AH, 2CE6H ; z dw 2368H, 23E7H ; h dw 1675H, 16E8H ; u dw 1769H, 17E9H ; i dw 256BH, 25EAH ; k dw 266CH, 26EBH ; l dw 326DH, 32ECH ; m dw 316EH, 31EDH ; n dw 246AH, 24EEH ; j dw 186FH, 18EFH ; o dw 1970H, 00F0H ; p dw 1372H, 13F1H ; r dw 1F73H, 1FF3H ; s dw 1474H, 14F4H ; t dw 1579H, 15F5H ; y dw 2166H, 21F6H ; f dw 2D78H, 2DF7H ; x dw 2E63H, 2EF8H ; c dw 2F76H, 2FF9H ; v dw 1177H, 11F2H ; w dw 1E41H, 1EC1H ; A dw 3042H, 30C2H ; B dw 2247H, 22C3H ; G dw 2044H, 20C4H ; D dw 1245H, 12C5H ; E dw 2C5AH, 2CC6H ; Z dw 2348H, 23C7H ; H dw 1655H, 16C8H ; U dw 1749H, 17C9H ; I dw 254BH, 25CAH ; K dw 264CH, 26CBH ; L dw 324DH, 32CCH ; M dw 314EH, 31CDH ; N dw 244AH, 24CEH ; J dw 184FH, 18CFH ; O dw 1950H, 19D0H ; P dw 1352H, 13D1H ; R dw 1F53H, 1FD3H ; S dw 1454H, 14D4H ; T dw 1559H, 15D5H ; Y dw 2146H, 21D6H ; F dw 2D58H, 2DD7H ; X dw 2E43H, 2ED8H ; C dw 2F56H, 2FD9H ; V dw 1157H, 117eH ; w dw 0FFFFH
INITIALIZE PROC NEAR ASSUME DS:CODE PUSH CS POP ES
MOV AX,3306H INT 21H MOV OS_Ver,BX
MOV AX,0CC00h INT 2Fh CMP AL,0FFh JNE PARSE CMP BX,"GK" JNE PARSE MOV INSTALL_FLAG,1 ;Program is already installed MOV CS:[CodePage],DL ;If installed DL holds active CP;;PARSE: CLD ;CLEAR DIRECTION XOR CH,CH MOV SI,80H ;Point DS:SI to command line MOV CL,[SI] CMP CL,0 JE ENDSCAN INC SIINIT1: LODSB CMP AL,"/" JE SLASHCARINIT6: LOOP INIT1 JMP ENDSCANSLASHCAR: CMP BYTE PTR [SI],'?' JNE NO_HELP JMP DISP_HELPNO_HELP: CMP BYTE PTR [SI],'8' JE INIT2
CMP BYTE PTR [SI],'9' JE INIT3
CMP BYTE PTR [SI],'7' JE INIT4
CMP BYTE PTR [SI],'4' JE INIT4
AND BYTE PTR [SI],0DFh ;Change char to uppercase; CMP BYTE PTR [SI],'U'; JE UNINSTALL ;Yes, then uninstall program
CMP BYTE PTR [SI],'H' ; Ask for help JNE INIT6 ; No branchDISP_HELP: CALL DISP_BANNER MOV DX,OFFSET HELP_BANNER MOV AH,9 INT 21H
MOV AX,4C00H ;Exit with ERRORLEVEL = 0 INT 21H
INIT2: CMP BYTE PTR [SI+1],'6' JNE INIT6 CMP BYTE PTR [SI+2],'9' JNE INIT6 MOV CS:[CodePage],2 JMP INIT6
INIT3: CMP BYTE PTR [SI+1],'2' JNE INIT6 CMP BYTE PTR [SI+2],'8' JNE INIT6 MOV CS:[CodePage],3 JMP INIT6INIT4: CMP BYTE PTR [SI+1],'3' JNE INIT6 CMP BYTE PTR [SI+2],'7' JNE INIT6 MOV CS:[CodePage],1 JMP INIT6
ENDSCAN: MOV AL,CS:[CodePage] CMP AL,ES:[CPTable] JE NOCP MOV ES:[CHECKFLAG],1 ;Clear CHECKFLAG byte MOV ES:[CPTable],AL CALL ChangeCPNOCP: CMP INSTALL_FLAG,1 ;Branch if not installed JNE INSTALL1 MOV DX,OFFSET CONFIRM_MSG3 ;Print confirmation message JMP SHORT CONFIRM_AND_EXIT ;And exit
UNINSTALL: CMP INSTALL_FLAG,1 ;Error if not installed JE UNINSTALL2
MOV AL,3 MOV DX,OFFSET ERRMSG1 ;Initialize error pointer JMP ERROR_EXITUNINSTALL2: CALL REMOVE ;Uninstall the program JNC UNINSTALL3
MOV AL,4 MOV DX,OFFSET ERRMSG2 ;Initialize error pointer JMP ERROR_EXITUNINSTALL3: MOV DX,OFFSET CONFIRM_MSG2 ;Print confirmation message
CONFIRM_AND_EXIT: PUSH DX CALL DISP_BANNER POP DX MOV AH,9 INT 21H MOV AX,4C00H ;Exit with ERRORLEVEL = 0 INT 21H
ERROR_EXIT: PUSH AX ;Save registers
MOV AH,9 INT 21H
POP AX ;Error code MOV AH,4CH ;Terminate with ERRORLEVEL set INT 21H
INSTALL1: PUSH ES MOV AX,3509H INT 21H MOV WORD PTR OLD_INT09H,BX ;Address and put it in our location MOV WORD PTR OLD_INT09H+2,ES MOV DX,OFFSET NEW_INT09H MOV AX,2509H INT 21h mov ax, 352Fh ; Request DOS Function 35h int 21h ; Get interrupt vector in ES:BX MOV WORD PTR OLD_INT2FH,BX ;Address and put it in our location MOV WORD PTR OLD_INT2FH+2,ES MOV DX,OFFSET MultiPlex MOV AX,252Fh INT 21h CALL DISP_BANNER POP ES MOV AX,DS:[2CH] ;Get environment segment MOV ES,AX ; address from PSP MOV AH,49H ;Then deallocate environment INT 21H ; space reserved by DOS INT 11H TEST AL,10H JNZ NOCGA MOV CURSOR0,0607H MOV CURSOR1,0307HNOCGA: MOV DX,OFFSET INITIALIZE INT 27H
DISP_BANNER: MOV DX,OFFSET MSGSTRT MOV AH,9 INT 21h MOV DX,OFFSET MSG869 CMP CS:[CodePage],2 JE DISPREST MOV DX,OFFSET MSG928 CMP CS:[CodePage],3 JE DISPREST MOV DX,OFFSET MSG737DISPREST: MOV AH,9 INT 21h CMP OS_Ver,ISWINDOWSNT JNE BANNER_END MOV DX,OFFSET MSGONNT MOV AH,9 INT 21HBANNER_END: RETINITIALIZE ENDP
;-----------------------------------------------------------------------------;REMOVE deallocates the memory block addressed by ES and restores the;Interrupt vector displaced on installation.;-----------------------------------------------------------------------------REMOVE PROC NEAR
PUSH ES ;Get current interrupt MOV AX,352FH INT 21H
MOV BX,ES POP ES MOV AX,ES CMP BX,AX ;Program cannot be uninstalled JNE NO_RESTORE_VECTOR PUSH ES ;Get current interrupt MOV AX,3509H INT 21H
MOV BX,ES POP ES MOV AX,ES CMP BX,AX ;Program cannot be uninstalled JE RESTORE_VECTOR NO_RESTORE_VECTOR: STC ;Return with CF = 1 for error RETRESTORE_VECTOR: PUSH DS ;Restore displaced interrupt ASSUME DS:NOTHING ; vector
LDS DX,ES:[BIOS_ISR] MOV AX,2509H INT 21H
LDS DX,ES:[MULTEX_ISR] MOV AX,252fH INT 21H POP DS ASSUME DS:CODE
NOT WORD PTR ES:[BEGIN] ;Remove fingerprint
MOV AH,49H ;Free memory given to INT 21H ; original program block RET ;Exit with CF intact
REMOVE ENDP
INSTALL_FLAG DB 0CodePage DB 1
MSGSTRT DB 0ah,0dh DB 'GREEK Driver for MS-DOS. Copyright 1994 Microsoft Hellas',0ah,0dh DB 'Active Code Page is ','$'MSG737 DB '737',0ah,0dh,'$'MSG869 DB '869',0ah,0dh,'$'MSG928 DB '928',0ah,0dh,'$'
MSGONNT DB 'Running under MS Windows NT',10,13,'$'ERRMSG1 DB "Greek driver not loaded",0dh,0ah,"$"ERRMSG2 DB "Cannot unload Greek driver",0dh,0ah,"$"CONFIRM_MSG2 DB "Driver unloaded.",0dh,0ah,"$"CONFIRM_MSG3 DB "Driver loaded."Dummy DB 0dh,0ah,"$"
HELP_BANNER DB 0ah,0dh DB 'Hotkeys for keyboard switching are:',0ah,0dh DB ' Alt + Right Shift, Greek On ',0ah,0dh DB ' Alt + Left Shift, Greek Off',0ah,0dh DB ' Ctrl + Right Shift, Semigraphics',0ah,0dh,0ah,0dh DB 'For code page switching,',0ah,0dh DB 'set Scroll Lock on and press:',0ah,0dh DB ' Alt + 1 for C.P. 737',0ah,0dh DB ' Alt + 2 for C.P. 869',0ah,0dh DB ' Alt + 3 for C.P. 928',0ah,0dh DB 0dh,0ah,'Valid switches are:',0dh,0ah DB ' /737: code page 737 (default)',0dh,0ah DB ' /869: code page IBM 869',0dh,0ah DB ' /928: code page ELOT 928',0dh,0ah,'$'
CODE ENDS END BEGIN
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