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sys7.1-doc-wip/OS/Keyboard/KbdInstall.a
Horst Beepmanh 33cd9271f4 SuperMarioProj.1994-02-09
2019-07-27 22:37:48 +08:00

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;_________________________________________________________________________________________
;
; File: KbdInstall.a
;
; Contains: Code to ADB keyboard driver and code for installing keyboard driver as
; well as for installing resources KMAP & KCHR.
; This file is the code that is put in the System file's ADBS
; resource ID = 2. The driver in this file overrides the driver in the ROM
; and overrides any patches to the ROM driver. However, this driver
; depends on the ADBProc in the ROM/Patch for the deallocation of the
; keyboard data buffer at the beginning of ADBReinit.
;
; Written by: Joe Fontana, Ed Tecot and Gary G. Davidian
;
; Copyright: © 1986-1992 by Apple Computer, Inc., all rights reserved.
;
; Change History (most recent first):
;
; <4> 10/22/92 JMF Added changes so that the modifiers of the last KEYBOARD
; pressed are the modifiers that the Norsi KEYPAD uses,
; since the KEYPAD has no modifier keys of its own.
; <3> 10/22/92 JMF Incorporated ROM keyboard Driver into ADBS Resource ID=2.
; <2> 12/28/89 dba Used MAIN instead of PROC to get dead code stripping.
; <1.1> 8/28/89 SES Removed references to nFiles.
; <1.0> 11/16/88 CCH Added to EASE.
; 3/2/87 EMT Fixed bug introduced above.
; 2/9/87 EMT Permit KCHR to be overridden Check files of type 'KCAP' for
; KMAPs Use default KMAP (0) as last resort Flush keyboard on
; exit. Dispose of myself on exit.
; 10/14/86 EMT Fix bug related to 6 Oct change above.
; 10/6/86 EMT Data area can be set up by ROM.
; 7/15/86 EMT Updated to use KCHR resource.
; 6/25/86 EMT Created.
;
;_________________________________________________________________________________________
LOAD 'StandardEqu.d'
; Keyboard driver data
KBufCount EQU 2
KBufLen EQU 10 ; 8 bytes + length + inuse
KMAPPtr EQU $00
KeyBits EQU KMAPPtr+4
KCHRPtr EQU KeyBits+(128/8)
DeadKey EQU KCHRPtr+4
KNoADBOp EQU DeadKey+4
KNumBufs EQU KNoADBOp+1
KFirstBuf EQU KNumBufs+1
KbdDSize EQU KFirstBuf+(KBufCount*KBufLen)
str EQU -$100
iopb EQU str-ioFQElSize
KISize EQU iopb
; KMAP offsets
KMid EQU $00
KMtype EQU $01
KMvers EQU KMid+2
KMstart EQU KMvers+2
KMnumEx EQU KMstart+128
KMstEx EQU KMnumEx+2
talkCmd EQU $0C ; Command for Talk R0
keypadNorsi EQU $0E ; Handler ID for Norsi ergonomic keypad
;_________________________________________________________________________________________
;
; Routine: KbdInst
; Arguments: D0.B ADB Address
; D1.B Device Type
; Output: None
; Function: Loads and locks the KMAP and KCHR resources used by the keyboard driver,
; updates the ADB table and installs a new keyboard driver
;
; Side Effects: Trashes A0, A1, D0, D2
;_________________________________________________________________________________________
KbdInst MAIN EXPORT
BRA.S @Start ; Branch around version number
DC.W $0001 ; Version number
@Start MOVEM.L D3-D7/A2-A4, -(SP) ; Save the registers
LINK A6, #KISize ; Save space on stack
MOVE.W D0, D2 ; Save the ADB Address
SUB.L #10, SP ; Allocate space on stack
MOVE.L SP, A0 ; Pointer to data area
_GetADBInfo
ADDQ.L #2, SP ; Discard OrigAddr and DeviceType
MOVE.L 4(SP), A0 ; Put the data address in A0
MOVE.L A0, D0 ; See if it is a real address
BEQ.S @AllocBuf ; Skip DisposPtr, if no buffer allocated yet
_DisposPtr ; Dispose of data allocated by the ROM
@AllocBuf MOVE.L #KbdDSize, D0 ; Amount of space needed for new keyboard drvr data
_NewPtr ,SYS,CLEAR ; Get a pointer
MOVE.L A0, A1 ; Save it in A1
MOVE.B #KBufCount, KNumBufs(A1)
KCHRLoad SUBQ.L #4, SP ; Make room for result
MOVE.L #'KCHR', -(SP) ; ResType = KCHR
CLR.W -(SP) ; theID = 0 (for now)
MOVE.W #MapTrue, ROMMapInsert ; Use ROM resource if available
_GetResource
MOVE.L (SP), -(SP) ; Save the handle
BEQ NoKCHR ; Skip if NIL
_DetachResource ; Detach it
MOVE.L (SP)+, A0
_HLock ; Lock it down
MOVE.L (A0), KCHRPtr(A1) ; Dereference and put away
; We didn't find the KMAP in the system file or ROM, try the blessed folder
MOVE.L #'KCAP', D3 ; File type
CLR.W iopb+ioVRefNum(A6) ; The blessed folder
CLR.W iopb+ioFDirIndex(A6) ; Initialize the index
LEA str(A6), A0 ; Get the address of local string
MOVE.L A0, iopb+ioFileName(A6) ; Put in iopb
MOVEQ #0, D4 ; No resource file on first pass
MOVE.W #MapTrue, ROMMapInsert ; Use ROM resource first time
FindKMAP ;
SUBQ.L #4, SP ; Make room for result
MOVE.L #'KMAP', -(SP) ; ResType = KMAP
CLR.W -(SP) ; Clear it out since Device Type is byte
MOVE.B D1, 1(SP) ; theID = DeviceType
_GetResource
MOVE.L (SP), -(SP) ; Save the handle
BNE.S GotKMAP ; Skip if not NIL
ADDQ.L #8, SP ; Clean off the stack
TST.W D4 ; File open?
BEQ.S NextFile ; Nope, go on
MOVE.W D4, -(SP) ; refNum
_CloseResFile ;
NextFile
LEA iopb(A6), A0 ; Point to the block
ADD.W #1, ioFDirIndex(A0) ; Increment the file index
_GetFileInfo ;
BMI.S NoMoreFiles ; That's all of them
CMP.L ioFlUsrWds+fdType(A0), D3 ; Correct type?
BNE.S NextFile ; Nope, try again
SUBQ.L #2, SP ; Make room for result
PEA str(A6) ; fileName
_OpenResFile ;
MOVE.W (SP)+, D4 ; Store the refNum
BRA.S FindKMAP ;
NoMoreFiles
; All is not lost. We can try to find the default KMAP (0)
SUBQ.L #4, SP ; Make room for result
MOVE.L #'KMAP', -(SP) ; ResType = KMAP
CLR.W -(SP) ; theID = 0
MOVE.W #MapTrue, ROMMapInsert ; Use ROM resource if available
_GetResource ;
MOVE.L (SP), -(SP) ; Save the handle
BEQ.S NoKMAP ; Skip if NIL
GotKMAP
; Assumes two copies of the resource handle are on the stack.
_DetachResource ; Detach it
MOVE.L (SP)+, A0
_HLock ; Lock it down
MOVE.L (A0), A0 ; Dereference it
MOVE.L A0, KMAPPtr(A1) ; Put it away
MOVE.B D1, KbdType ; Update KbdType to show this keyboard
MOVE.B D2, KbdLast ; Same with KbdLast
MOVE.W D2, D0 ; ADB Address
MOVE.L A1, 4(SP) ; Replace the data address
LEA KbdDrvr, A0
MOVE.L A0, (SP)
MOVE.L SP, A0 ; Pointer to two addresses
_SetADBInfo
TST.W D4 ; File open?
BEQ.S Done ; Nope, go on
MOVE.W D4, -(SP) ; refNum
_CloseResFile ;
BRA.S Done ;
NoKMAP
NoKCHR
ADDQ.L #8, SP ; Discard unused parameters
Done
MOVE.W D2, D0 ; ADB Address
LSL.W #4, D0 ; Put address in high nibble
ADDQ.W #1, D0 ; Flush command
CLR.L -(SP) ; No data address
CLR.L -(SP) ; No completion routine
CLR.L -(SP) ; No buffer
MOVE.L SP, A0 ; Point to the block
_ADBOp ; Flush the keyboard
LEA 12(SP), SP ; Remove parameters from stack
UNLK A6 ;
MOVEM.L (SP)+, D3-D7/A2-A4 ; Restore the registers
RTS ; End KbdInst
;_________________________________________________________________________________________
;
; Routine: KbdDrvr
; Arguments: D0.B ADB Command
; A0.L ADB Buffer address
; A1.L ADB Completion Routine Address (= KbdServ)
; A2.L Pointer to private data area
; Output: None
; Function: Reads buffer and posts keyboard events as appropriate.
; Side Effects: Trashes A0, A1, D0, D1, D2, D3
;
;_________________________________________________________________________________________
KbdDrvr MOVE.L A2, D3 ; See if A2 actually contains a pointer
BEQ KbdDone ; If not, can't go on.
MOVE.L A0, A1 ; Save A0 in A1
LSR.W #4, D0 ; Shift ADB Address down to low nibble
MOVEQ #$F, D1 ; Mask for ADB Address
AND.L D1, D0 ; D0 now contains ADB Address
MOVE.L D0, D3 ; Save it in D3
LEA -10(SP), SP ; Build parameter block on stack
MOVE.L SP, A0 ; Point to it
_GetADBInfo
ROR.L #8, D3 ; Rotate ADB Address to high byte
MOVE.W (SP)+, D3 ; Put Device Type, Orig Addr in low word
ADDQ.L #8, SP ; Clear off the rest of the stack
SWAP D3 ; D3 is now Device Type;Orig Addr;ADB Addr;Unused
MOVE.B 1(A1), D0 ; Get first stroke
MOVE.B 2(A1), -(SP) ; Save second one on stack
BSR.S KeyIn
MOVE.B (SP)+, D0 ; Get second stroke
;_________________________________________________________________________________________
;
; Routine: KeyIn
; Arguments: D0.B Raw Keycode
; D3.L Device Type, Orig Addr, ADB Addr, Unused
; A2.L Pointer to private data area
; Output: None
; Function Translates keycode and posts event as appropriate.
; Side Effects: Trashes A0, A1, D0, D1, D2, D3
; Called From: KbdDrvr twice, (1 BSR, 1 fall-through)
;
;_________________________________________________________________________________________
KeyIn CMP.B #$FF, D0 ; Is it not a key?
BEQ KbdDone ; Skip if so
CLR.W KeyLast ; Stop repeating
CLR.W HiKeyLast ; Stop repeating
MOVEQ #$7F, D1 ; Mask = 01111111 binary
AND.B D0, D1 ; Clear all but low 7 bits
MOVE.L KMAPPtr(A2), A1 ; Get KMAP table address
MOVE.B KMstart(A1, D1), D3 ; Get device independent keycode
BPL.S NoExcept ; Handle normally if high bit clear
; An exception has been indicated. Find the correct entry in the exception
; table and handle as appropriate.
BCLR #7, D3 ; Clear the high bit
LEA KMnumEx(A1), A0 ; Get to the beginning of the exceptions
MOVE.W (A0)+, D2 ; Number of entries in table
BEQ.S NoExcept ; Skip if none
SUBQ.W #1, D2 ; Turn it into a zero-based count
ExLoop
CMP.B (A0)+, D0 ; See if this is the one
BEQ FoundEx ; Skip if so
MOVE.B 1(A0), D1 ; Get the string length
LEA 2(A0, D1), A0 ; Point to the next entry
DBRA D2, ExLoop ; Go around again
NoExcept
MOVEQ #0, D2 ; Clear out D2
MOVE.B D3, D2 ; Copy virtual keycode to D2
LSR.W #3, D2 ; Divide by 8 for byte offset
TST.B D0 ; Up or down key?
BMI.S KeyUp ; Skip around if key up
BSET D3, KeyBits(A2, D2) ; Set it for key down
BRA.S Hammer
KeyUp
BCLR D3, KeyBits(A2, D2) ; Clear it for key up
BSET #7, D3 ; Remember key up for raw key.
;* Begin Norsi Keypad changes (keypad uses modifiers from last keyboard pressed) 04/21/92*
Hammer MOVE.L D3, D0 ; Get Device Type, Orig Addr, ADB Addr, keycode
ROL.L #8, D0 ; Rotate Device Type into low byte
CMP.B #keypadNorsi, D0 ; Is this a Norsi ergonomic KEYPAD?
BNE.S HammerKeyMap ; If not, go update the keymap
MOVE.W KeyMap+6, D0 ; Modifier bits of last pressed keyboard
AND.W #$807F,D0 ; Mask off non-modifier bits
MOVE.W KeyBits+6(A2), D1 ; Get Norsi KEYPAD's pseudo modifier bits
AND.W #$7F80,D1 ; Mask off KEYPAD's old modifier bits
OR.W D0, D1 ; Replace KEYPAD's modifier bits with the modifier
MOVE.W D1, KeyBits+6(A2) ; bits from the last pressed keyboard
;* End Norsi Keypad changes (keypad uses modifiers from last keyboard pressed) 04/21/92*
HammerKeyMap
MOVEM.L KeyBits(A2), D0-D2/A0 ; Get current devices map of key pressed or not
MOVEM.L D0-D2/A0, KeyMap ; Hammer this devices map into global keymap
MOVE.L D3, D0 ; Bits 15-8 contain ADB address
LSR.L #8, D0 ; Put it in the low byte
MOVE.B D0, KbdLast ; Stuff it down
SWAP D0 ; Now get DeviceType
MOVE.B D0, KbdType ; Update KbdType to show last one used
; The next two instructions build the byte of modifier flags from the
; global key state information. This works because the modifier flags
; exist in bits $37 to $3E, which appear in the following manner:
; Byte | 6 | 7 |
; Bit |37 36 35 34 33 32 31 30|3F 3E 3D 3C 3B 3A 39 38|
; |^^ | ^^ ^^ ^^ ^^ ^^ ^^ ^^|
MOVE.W KeyBits+6(A2), D0 ; Get modifier word
ROL.W #1, D0 ; Rotate in command key
SUBQ.L #4, SP ; Make room for result
MOVE.L KCHRPtr(A2), -(SP) ; Push address of KCHR resource
MOVE.W D3, -(SP) ; Push keycode (w/o modifiers)
MOVE.B D0, (SP) ; Put modifiers where they belong
PEA DeadKey(A2) ; Push address of dead key state
_KeyTrans
MOVE.W (SP)+, D0 ; Get the high word first
BEQ.S NextWord ; Skip if null
BSR.S PostIt ; Otherwise post the event
NextWord
MOVE.W (SP)+, D0 ; Get the other word
BEQ.S KbdDone ; If null, we're done
;_________________________________________________________________________________________
;
; Routine: PostIt
; Arguments: D0.W ASCII Code
; D3.W ADB Address in high byte and raw keycode in low byte
; A2.L Pointer to private data area
; Output: None
; Function Posts the keyboard event as appropriate.
; Side Effects: Trashes A0, D0, D1
; Called From: KeyIn twice, (1 BSR, 1 fall-through)
;
;_________________________________________________________________________________________
PostIt ROR.W #8, D0 ; Swap ASCII high and low byte (xxLH)
SWAP D0 ; Move to high word (LHxx)
MOVE.W D3, D0 ; Move in ADB address and raw keycode (LHFR)
ROL.L #8, D0 ; Rotate around (HFRL)
TST.B D3 ; Key up or down?
BMI.S PostKeyUp ; Skip if key up
MOVE.L Ticks, D1
MOVE.L D1, KeyTime ; Mark the time for auto repeat
MOVE.L D1, KeyRepTime
MOVE.W D0, KeyLast ; Save event message
SWAP D0
MOVE.W D0, HiKeyLast ; Save high word too
SWAP D0
MOVE #KeyDwnEvt, A0 ; Get event number
_PostEvent ; Post it
KbdDone
RTS ; And leave
PostKeyUp
MOVE #KeyUpEvt, A0 ; Get event number
BCLR #15, D0 ; Clear the up/down bit in the raw keycode
_PostEvent ; Post it
RTS ; End KbdDrvr
;_________________________________________________________________________________________
;
; Routine: FoundEx
; Arguments: A0.L Pointer to exception data
; A2.L Pointer to private data area
; D3.W Virtual keycode
; Output: None
; Function An exception exists for this particular keystroke. Process it
; appropriately.
; Side Effects: Trashes A0, D0, D1, D2
; Called From: KeyIn twice, (1 BSR, 1 fall-through)
;
;_________________________________________________________________________________________
FoundEx
MOVE.B (A0)+, D1 ; Get the operand
BPL.S @notXORKey ; Skip if not
MOVEQ #0, D2 ; Clear out D2
MOVE.B D3, D2 ; Copy virtual keycode to D2
LSR.W #3, D2 ; Divide by 8 for byte offset
BTST D3, KeyBits(A2, D2) ; Get current key state
SEQ D0 ; Invert and put in D0
@notXORKey
MOVEQ #$F, D2 ; Prepare mask for ADB op
AND.B D1, D2 ; D2 is ADB op w/o net address
BEQ.S KbdDone ; If ADB op = 0 (Bus Reset), ignore key
TST.B KNoADBOp(A2) ; See if we should even do this
BNE NoExcept ; Skip if not
MOVEM.L D0/A1, -(SP) ; Save D0 & A1
MOVE.L A0, -(SP) ; Data address = mask
CMP.B #TalkCmd, D2 ; Is it a talk command?
BGE.S @kbdTalk ; Skip if so
PEA KbdBufFree ; Completion routine = KbdBufFree
BRA.S @kbdBufAlloc
@kbdTalk
PEA KbdListen ; Completion Routine = KbdListen
@kbdBufAlloc
LEA KNumBufs(A2), A1 ; Point to the number of available buffers
MOVE.B (A1)+, D1 ; Get the number of buffers
BEQ.S @kNoBufAvail ; Skip if none available
SUBQ.W #1, D1 ; Turn it into a zero based count
@kBufLoop
TST.B (A1)+ ; Is the buffer busy?
BEQ.S @kGotABuf ; No, Go use it
LEA KBufLen-1(A1), A1 ; Point to the next one
DBRA D1, @kBufLoop ; Go around again
BRA.S @kNoBufAvail ; It's a loss
@kGotABuf
MOVE.B D0, -1(A1) ; Store the up/down state in the busy info
BSET #1, -1(A1) ; Make sure it shows up as busy
MOVE.L A1, -(SP) ; Buffer Address
MOVE.B (A0), D1 ; Get length of source string
CMP.B #8, D1 ; Greater than 8?
BLS.S @kStrCopyLoop ; If not, no problem
MOVEQ #8, D1 ; Copy only the first 8 to avoid trashing mem
@kStrCopyLoop
MOVE.B (A0)+, (A1)+ ; Start copying the string
DBRA D1, @kStrCopyLoop ; Repeat D1+1 times
MOVE.W D3, D0 ; Get the FDB Address
CLR.B D0 ; Clear out the low byte
LSR.W #4, D0 ; Shift it down to form high nibble of ADB Command
OR.B D2, D0 ; Include low op nibble
MOVE.L SP, A0 ; Point to parameter block
_ADBOp ; Pray that everything is OK
BNE.S @kOpFailed ; Branch if not
ADDQ.L #4, SP ; Pop Buffer Address
@kNoBufAvail
ADDQ.L #8, SP ; Pop Completion and Data Address
MOVEM.L (SP)+, D0/A1 ; Restore D0 & A1
BRA NoExcept ; Finish dealing with the keystroke
@kOpFailed
MOVE.L (SP)+, A1 ; Get the buffer address
CLR.B -1(A1) ; Mark it as not busy
BRA.S @kNoBufAvail ; End FoundEx
;_________________________________________________________________________________________
;
; Routine: KbdListen
; Arguments: D0.B ADB Command
; D1.L DeviceType, OrigAddr, ADBAddr, Unused (byte order)
; A0.L ADB Buffer Address
; A1.L ADB Completion Routine Address (= KbdListen)
; A2.L Pointer to private data area
; Output: None
; Function: Sets or clears bits in mask pointed to by A2 in buffer pointed
; to by A0. Used to alter values of registers in ADB devices.
; Side Effects: Trashes A0, A1, A2, D0, D1, D2
;
;_________________________________________________________________________________________
KbdListen MOVE.L A0, A1 ; Copy A0 into A1
MOVEQ #0, D1 ; Clear out D1
MOVE.B (A1)+, D1 ; Get length of buffer
MOVE.B (A2)+, D2 ; Get length of mask
CMP.B D2, D1 ; Is mask length smaller?
BLS.S @notSmall ; Skip if not
MOVE.B D2, D1 ; Use the mask length instead
@notSmall
; (A2) is a mask for (A0), 0 meaning don't change, 1 meaning clear or set
; depending upon the value of -1(A0).
TST.B -1(A0) ; PL = clear, MI = set
BPL.S @endClrLoop
BRA.S @endSetLoop
@setLoop
MOVE.B (A2)+, D2 ; Get the mask byte
OR.B D2, (A1)+ ; Set the correct bits
@endSetLoop
DBRA D1, @setLoop ; Go around again
BRA.S @kLoopDone
@clrLoop
MOVE.B (A2)+, D2 ; Get the mask byte
NOT.B D2 ; Invert it
AND.B D2, (A1)+ ; Clear the correct bits
@endClrLoop
DBRA D1, @clrLoop ; Go around again
@kLoopDone
CLR.L -(SP) ; No data address needed
PEA KbdBufFree ; Completion routine = KbdBufFree
MOVE.L A0, -(SP) ; Use the buffer one more time
MOVE.L SP, A0 ; Point to parameter block
BCLR #2, D0 ; Turn the talk into a listen command
_ADBOp
BNE.S @kLSuccess ; Branch on success
MOVE.L (SP), A0 ; Get the buffer address
CLR.B -1(A0) ; Mark it as not busy
@kLSuccess
LEA 12(SP), SP ; Pop the parameter block
RTS ; End KbdListen
;_________________________________________________________________________________________
;
; Routine: KbdBufFree
; Arguments: D0.B ADB Command
; D1.L DeviceType, OrigAddr, ADBAddr, Unused (byte order)
; A0.L ADB Buffer Address
; A1.L ADB Completion Routine Address (= KbdListen)
; A2.L Pointer to private data area
; Output: None
; Function: Marks the buffer pointed to by A0 as free.
; Side Effects: None
;
;_________________________________________________________________________________________
KbdBufFree CLR.B -1(A0) ; Mark buffer free
RTS ; End KbdBufFree
;_________________________________________________________________________________________
;_________________________________________________________________________________________
;_________________________________________________________________________________________
END ;End file
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