20211002
This commit is contained in:
lampmerchant
parent
9218430e99
commit
712d537ff3
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@ -97,14 +97,16 @@ TX_SIZ2 equ 2 ;Number of bytes to be transmitted minus one
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TX_SIZ1 equ 1 ; "
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TX_SIZ0 equ 0 ; "
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;COLLISN:
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COL_KBD equ 7 ;Set when there was a collision on keyboard's address
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COL_MSE equ 6 ;Set when there was a collision on mouse's address
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;DV_FLAGS:
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DV_KBDC equ 7 ;Set when there was a collision on keyboard's address
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DV_MSEC equ 6 ;Set when there was a collision on mouse's address
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DV_MSES equ 4 ;Set when the mouse needs service
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;U_FLAGS:
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U_HEADR equ 7 ;Set when we've received and are working a header byte
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U_FWD equ 6 ;Set when we're just forwarding (not queuing) bytes
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U_CNTR3 equ 3 ;Counter of bytes to forward or queue
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U_ISMSE equ 5 ;Set to receive for the mouse, clear for keyboard
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U_CNTR3 equ 3 ;Counter of bytes to forward or act on
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U_CNTR2 equ 2 ; "
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U_CNTR1 equ 1 ; "
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U_CNTR0 equ 0 ; "
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@ -137,20 +139,20 @@ KMD_ROP equ 2 ;Right Option
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RX_FLAGS ;Receiver flags
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TX_FLAGS ;Transmitter flags
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COLLISN ;Collision flags
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DV_FLAGS ;Device flags
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U_FLAGS ;UART flags
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RX_TDOWN ;Time spent down in the last down-up transition
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RX_TUP ;Time spent up in the last down-up transition
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ADB_PTR ;Receiver/transmitter state machine pointer
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ADB_CMD ;Receiver command buffer
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ADB_BUF ;Receiver/transmitter buffer
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ADB_BUF2 ;2nd byte of transmitter buffer
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ADB_BUF3 ;3rd byte of transmitter buffer
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ADB_BUF4 ;4th byte of transmitter buffer
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ADB_BUF5 ;5th byte of transmitter buffer
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ADB_BUF6 ;6th byte of transmitter buffer
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ADB_BUF7 ;7th byte of transmitter buffer
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ADB_BUF8 ;8th byte of transmitter buffer
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ADB_BUF2 ;2nd byte of receiver/transmitter buffer
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ADB_BUF3 ;3rd byte of receiver/transmitter buffer
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ADB_BUF4 ;4th byte of receiver/transmitter buffer
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ADB_BUF5 ;5th byte of receiver/transmitter buffer
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ADB_BUF6 ;6th byte of receiver/transmitter buffer
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ADB_BUF7 ;7th byte of receiver/transmitter buffer
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ADB_BUF8 ;8th byte of receiver/transmitter buffer
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endc
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@ -161,6 +163,15 @@ KMD_ROP equ 2 ;Right Option
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KBD_MODS ;Keyboard modifier key state
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KBD_3_H ;Keyboard register 3 high byte
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KBD_3_L ;Keyboard register 3 low byte
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MSE_DXH ;Mouse with handler 1 delta X high byte
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MSE_DXL ;Mouse with handler 1 delta X low byte
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MSE_DYH ;Mouse with handler 1 delta Y high byte
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MSE_DYL ;Mouse with handler 1 delta Y low byte
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MS4_0_1 ;Mouse with handler 4 register 0 first byte
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MS4_0_2 ;Mouse with handler 4 register 0 second byte
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MS4_0_3 ;Mouse with handler 4 register 0 third byte
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MS4_0_4 ;Mouse with handler 4 register 0 fourth byte
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MS4_0_5 ;Mouse with handler 4 register 0 fifth byte
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MSE_3_H ;Mouse register 3 high byte
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MSE_3_L ;Mouse register 3 low byte
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@ -339,7 +350,7 @@ Init
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movlw B'11110000'
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movwf OSCCON
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banksel IOCAN ;RA5 sets IOCAN[5] on negative edge
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banksel IOCAN ;RA5 sets IOCAF[5] on negative edge
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movlw B'00100000'
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movwf IOCAN
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@ -383,15 +394,15 @@ Init
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movlw 0x01
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movwf MSE_3_L
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movlw 0x20 ;Set up UART receiver queue (0x2000-0x207F),
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movwf FSR0H ; for which FSRs are push (FSR0) and pop (FSR1)
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movlw 0x20 ;Set up keyboard queue (0x2000-0x207F), for
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movwf FSR0H ; which FSRs are push (FSR0) and pop (FSR1)
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movwf FSR1H ; pointers
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clrf FSR0L
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clrf FSR1L
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clrf TX_FLAGS ;Particularly important that these are zero
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clrf RX_FLAGS
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clrf COLLISN
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clrf DV_FLAGS
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clrf U_FLAGS
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clrf ADB_PTR
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@ -405,18 +416,110 @@ GotUartByte
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bra GUNewHeader ; "
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btfsc U_FLAGS,U_FWD ;If we're forwarding bytes, forward this one,
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bra GUForwardByte ; else queue it
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btfsc U_FLAGS,U_ISMSE ;If this byte is for the mouse, interpret it
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bra GUMouseByte ; as such, otherwise interpret for keyboard
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;fall through
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GUQueueByte
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GUKeyboardByte
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movlb 3 ;Push the byte that came in over the UART onto
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movf RCREG,W ; the receiver queue
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movf RCREG,W ; the keyboard queue
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movwi FSR0++ ; "
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bcf FSR0L,7 ; "
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decf U_FLAGS,F ;Decrement the counter in the UART flags
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movf U_FLAGS,W ;If the counter has reached zero, lower all
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andlw B'00001111' ; flags and await a new header byte
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btfsc STATUS,Z ; "
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clrf U_FLAGS ; "
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clrf U_FLAGS ;Keyboard packet done, await new header
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bra Main
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GUMouseByte
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bcf DV_FLAGS,DV_MSES;Don't signal for service, data may not be done
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movf U_FLAGS,W ;Branch into one of the following depending on
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andlw B'00000111' ; the remaining-bytes counter to determine how
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brw ; to interpret this one for the mouse:
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nop ;(0) This shouldn't happen, fall through to...
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bra GUMouseH4_5 ;(1) Finish with fifth byte of handler 4 reg 0
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bra GUMouseH4_4 ;(2) Store as fourth byte of handler 4 reg 0
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bra GUMouseH4_3 ;(3) Store as third byte of handler 4 reg 0
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bra GUMouseH4_2 ;(4) Store as second byte of handler 4 reg 0
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bra GUMouseH4_1 ;(5) Store as first byte of handler 4 reg 0
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bra GUMouseDeltaX ;(6) Add to the X delta for handler 1 reg 0
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bra GUMouseDeltaY ;(7) Add to the Y delta for handler 1 reg 0
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GUMouseH4_5
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movlw B'01110111' ;Set the mouse position bits to 1s so we can
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movlb 1 ; overwrite them using AND and leave the mouse
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iorwf MS4_0_5,F ; buttons down if they were ever down
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movlb 3 ;Store the byte that came in over the UART as
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movf RCREG,W ; the fifth byte of the reply to a talk reg 0
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movlb 1 ; for a mouse with handler set to 4
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andwf MS4_0_5,F ; "
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bsf DV_FLAGS,DV_MSES;Signal that the mouse needs service
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clrf U_FLAGS ;Mouse packet done, await new header
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bra Main
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GUMouseH4_4
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movlw B'01110111' ;Set the mouse position bits to 1s so we can
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movlb 1 ; overwrite them using AND and leave the mouse
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iorwf MS4_0_4,F ; buttons down if they were ever down
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movlb 3 ;Store the byte that came in over the UART as
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movf RCREG,W ; the fourth byte of the reply to a talk reg 0
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movlb 1 ; for a mouse with handler set to 4
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andwf MS4_0_4,F ; "
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decf U_FLAGS,F ;Decrement remaining-bytes counter
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bra Main
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GUMouseH4_3
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movlw B'01110111' ;Set the mouse position bits to 1s so we can
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movlb 1 ; overwrite them using AND and leave the mouse
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iorwf MS4_0_3,F ; buttons down if they were ever down
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movlb 3 ;Store the byte that came in over the UART as
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movf RCREG,W ; the third byte of the reply to a talk reg 0
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movlb 1 ; for a mouse with handler set to 4
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andwf MS4_0_3,F ; "
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decf U_FLAGS,F ;Decrement remaining-bytes counter
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bra Main
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GUMouseH4_2
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movlw B'01111111' ;Set the mouse position bits to 1s so we can
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movlb 1 ; overwrite them using AND and leave the mouse
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iorwf MS4_0_2,F ; buttons down if they were ever down
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movlb 3 ;Store the byte that came in over the UART as
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movf RCREG,W ; the second byte of the reply to a talk reg 0
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movlb 1 ; for a mouse with handler set to 4
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andwf MS4_0_2,F ; "
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decf U_FLAGS,F ;Decrement remaining-bytes counter
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bra Main
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GUMouseH4_1
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movlw B'01111111' ;Set the mouse position bits to 1s so we can
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movlb 1 ; overwrite them using AND and leave the mouse
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iorwf MS4_0_1,F ; buttons down if they were ever down
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movlb 3 ;Store the byte that came in over the UART as
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movf RCREG,W ; the first byte of the reply to a talk reg 0
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movlb 1 ; for a mouse with handler set to 4
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andwf MS4_0_1,F ; "
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decf U_FLAGS,F ;Decrement remaining-bytes counter
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bra Main
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GUMouseDeltaX
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movlb 3 ;Grab the byte that came in over the UART
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movf RCREG,W ; "
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movlb 1 ;Add it to the low byte of the 16-bit delta X
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addwf MSE_DXL,F ; counter
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iorlw B'01111111' ;Sign-extend the byte and add this to the high
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btfss WREG,7 ; byte of the 16-bit delta X counter
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movlw 0 ; "
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addwfc MSE_DXH,F ; "
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decf U_FLAGS,F ;Decrement remaining-bytes counter
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bra Main
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GUMouseDeltaY
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movlb 3 ;Grab the byte that came in over the UART
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movf RCREG,W ; "
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movlb 1 ;Add it to the low byte of the 16-bit delta Y
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addwf MSE_DYL,F ; counter
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iorlw B'01111111' ;Sign-extend the byte and add this to the high
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btfss WREG,7 ; byte of the 16-bit delta Y counter
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movlw 0 ; "
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addwfc MSE_DYH,F ; "
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decf U_FLAGS,F ;Decrement remaining-bytes counter
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bra Main
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GUForwardByte
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@ -433,32 +536,34 @@ GUForwardByte
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GUNewHeader
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movlb 3 ;Grab the byte that came in over the UART
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movf RCREG,W ; "
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btfsc WREG,7 ;If any of its address bits are set, then we
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bra GUForwardHeader ; need to forward it
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btfsc WREG,6 ; "
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bra GUForwardHeader ; "
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btfsc WREG,5 ; "
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bra GUForwardHeader ; "
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btfss WREG,7 ;All header bytes have MSB set; if it's clear,
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clrf TXREG ; relay a zero; this way the host can send a
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btfss WREG,7 ; string of zero bytes to get all units to a
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bra Main ; known state
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bsf U_FLAGS,U_HEADR ;Raise the flag that we have a header byte
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bsf U_FLAGS,U_CNTR0 ;We'll be receiving at least one byte
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btfsc WREG,6 ;If bit 6 of the header byte is set, this is a
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bsf U_FLAGS,U_ISMSE ; mouse packet, so raise that flag
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btfsc WREG,6 ;If we're receiving a mouse packet, it has
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bsf U_FLAGS,U_CNTR1 ; seven bytes, so add six to the counter in the
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btfsc WREG,6 ; flags register
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bsf U_FLAGS,U_CNTR2 ; "
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btfsc WREG,5 ;If any of the incoming byte's address bits are
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bsf U_FLAGS,U_FWD ; set, then we need to forward it
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btfsc WREG,4 ; "
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bra GUForwardHeader ; "
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movwi FSR0++ ;Its address counter is zero, so push it onto
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bcf FSR0L,7 ; the receiver queue as is
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andlw B'00000111' ;Mask off its counter, increment it by one to
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incf WREG,W ; adjust it to be a normal countdown of bytes,
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iorlw B'10000000' ; set the have-header flag, and store this as
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movwf U_FLAGS ; the new value of UART flags register
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bra Main
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GUForwardHeader
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swapf WREG,W ;Decrement the address counter so we can send
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decf WREG,W ; this packet forward to its intended
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swapf WREG,W ; recipient
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movlb 3 ;Send the header byte forward with decremented
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movwf TXREG ; address counter
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andlw B'00000111' ;Mask off its counter, increment it by one to
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incf WREG,W ; adjust it to be a normal countdown of bytes,
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iorlw B'11000000' ; set the have-header and forward flags, and
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movwf U_FLAGS ; store this as the new value of UART flags reg
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bsf U_FLAGS,U_FWD ; "
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btfsc WREG,3 ; "
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bsf U_FLAGS,U_FWD ; "
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btfsc WREG,2 ; "
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bsf U_FLAGS,U_FWD ; "
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btfsc WREG,1 ; "
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bsf U_FLAGS,U_FWD ; "
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btfsc WREG,0 ; "
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bsf U_FLAGS,U_FWD ; "
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btfss U_FLAGS,U_FWD ;If we're not forwarding, we're done here
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bra Main ; "
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decf WREG,W ;Decrement the address and then pass the header
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movwf TXREG ; byte forward to the next device
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bra Main
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GotReset
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@ -501,22 +606,6 @@ GotCmd
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call ServiceRequest ; "
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bra Main
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Main
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movlb 0
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btfsc PIR1,RCIF
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bra GotUartByte
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btfsc RX_FLAGS,RX_RST
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bra GotReset
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btfsc RX_FLAGS,RX_CMD
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bra GotCmd
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btfsc RX_FLAGS,RX_DATA
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bra GotData
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btfsc RX_FLAGS,RX_ABRT
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bra GotDataEnd
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btfsc TX_FLAGS,TX_COL
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bra GotCollision
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bra Main
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KeyboardTalk
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movf ADB_CMD,W ;If this is a talk register 0, handle that
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andlw B'00000011' ; "
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@ -531,71 +620,27 @@ KeyboardTalk
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bra KeyboardTalk3 ;Else it's a talk register 3, handle that
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KeyboardTalk0
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movf FSR0L,W ;If the UART receiver queue is empty, we have
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xorwf FSR1L,W ; no data for either mouse or keyboard, so bail
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btfsc DV_FLAGS,DV_MSES;If the mouse needs service, effect a service
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call ServiceRequest ; request condition so the computer polls it
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movf FSR0L,W ;If the keyboard queue is empty, we have no
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xorwf FSR1L,W ; data, so bail
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btfsc STATUS,Z ; "
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bra Main ; "
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btfsc INDF1,3 ;If the byte on the top of the queue has bit 3
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call ServiceRequest ; set (mouse data) effect a service request
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btfsc INDF1,3 ; condition and send no data so the computer
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bra Main ; polls the mouse instead
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;fall through
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Talk0FromQueue
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movlw B'11111000' ;Zero the counter of bytes to transmit
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andwf TX_FLAGS,F ; "
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moviw FSR1++ ;Pop the control byte off the top of the queue
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bcf FSR1L,7 ; and keep only its bottom three bits (length
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andlw B'00000111' ; of transmission minus one)
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iorwf TX_FLAGS,F ;Copy its length field into the transmit count
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movwf ADB_BUF8 ; and use the last buffer byte as a counter
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moviw FSR1++ ;Move the first data byte from the queue into
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bcf FSR1L,7 ; the ADB buffer
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movwf ADB_BUF ; "
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bsf TX_FLAGS,TX_RDY ;Signal that we're ready to transmit
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movf ADB_BUF8,F ;If the byte counter is zero, then we only had
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btfsc STATUS,Z ; one byte of data (this shouldn't happen) to
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bra Main ; transmit and we're done
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moviw FSR1++ ;Move the second data byte from the queue into
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bcf FSR1L,7 ; the ADB buffer
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movwf ADB_BUF2 ; "
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decf ADB_BUF8,F ;Decrement the byte counter; if it is now zero,
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btfsc STATUS,Z ; we had two bytes of data to transmit and
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bra Main ; we're done
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moviw FSR1++ ;Move the third data byte from the queue into
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bcf FSR1L,7 ; the ADB buffer
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movwf ADB_BUF3 ; "
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decf ADB_BUF8,F ;Decrement the byte counter; if it is now zero,
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btfsc STATUS,Z ; we had three bytes of data to transmit and
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bra Main ; we're done
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moviw FSR1++ ;Move the fourth data byte from the queue into
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bcf FSR1L,7 ; the ADB buffer
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movwf ADB_BUF4 ; "
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decf ADB_BUF8,F ;Decrement the byte counter; if it is now zero,
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btfsc STATUS,Z ; we had four bytes of data to transmit and
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bra Main ; we're done
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moviw FSR1++ ;Move the fifth data byte from the queue into
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bcf FSR1L,7 ; the ADB buffer
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movwf ADB_BUF5 ; "
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decf ADB_BUF8,F ;Decrement the byte counter; if it is now zero,
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btfsc STATUS,Z ; we had five bytes of data to transmit and
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bra Main ; we're done
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moviw FSR1++ ;Move the sixth data byte from the queue into
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bcf FSR1L,7 ; the ADB buffer
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movwf ADB_BUF6 ; "
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decf ADB_BUF8,F ;Decrement the byte counter; if it is now zero,
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btfsc STATUS,Z ; we had six bytes of data to transmit and
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bra Main ; we're done
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moviw FSR1++ ;Move the seventh data byte from the queue into
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bcf FSR1L,7 ; the ADB buffer
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movwf ADB_BUF7 ; "
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decf ADB_BUF8,F ;Decrement the byte counter; if it is now zero,
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btfsc STATUS,Z ; we had seven bytes of data to transmit and
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bra Main ; we're done
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moviw FSR1++ ;Move the eighth data byte from the queue into
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bcf FSR1L,7 ; the ADB buffer
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movwf ADB_BUF8 ; "
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bra Main ;Can't have more than eight, so we're done
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moviw FSR1++ ;Pop the next keyboard code off the queue
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bcf FSR1L,7 ; "
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movwf ADB_BUF ;Copy it into the ADB buffer
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clrf ADB_BUF2 ;Put the customary 0xFF into the second byte of
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decf ADB_BUF2,F ; the ADB buffer
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xorlw 0x7F ;If the keyboard code was 0x7F, the reset key,
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btfsc STATUS,Z ; we need to put it in both bytes of what we
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bcf ADB_BUF2,7 ; send to the computer
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xorlw 0x7F ;Update keyboard register 2 according to this
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call UpdateKeyboard2 ; key press or release
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bsf TX_FLAGS,TX_RDY ;Set up the transmitter flags so we signal that
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bcf TX_FLAGS,TX_SIZ2; we're ready to transmit two bytes
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bcf TX_FLAGS,TX_SIZ1; "
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bsf TX_FLAGS,TX_SIZ0; "
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bra Main
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KeyboardTalk2
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movlb 1 ;Move the contents of keyboard register 2 into
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@ -633,24 +678,171 @@ MouseTalk
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andlw B'00000011' ; "
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btfsc STATUS,Z ; "
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bra MouseTalk0 ; "
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addlw -1 ;If this is a talk register 1, we have no
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btfsc STATUS,Z ; handler for that, so done
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bra Main ; "
|
||||
addlw -1 ;If this is a talk register 1, handle that
|
||||
btfsc STATUS,Z ; "
|
||||
bra MouseTalk1 ; "
|
||||
addlw -1 ;If this is a talk register 2, we have no
|
||||
btfsc STATUS,Z ; handler for that, so done
|
||||
bra Main ; "
|
||||
bra MouseTalk3 ;Else it's a talk register 3, handle that
|
||||
|
||||
Main
|
||||
movlb 0
|
||||
btfsc PIR1,RCIF
|
||||
bra GotUartByte
|
||||
btfsc RX_FLAGS,RX_RST
|
||||
bra GotReset
|
||||
btfsc RX_FLAGS,RX_CMD
|
||||
bra GotCmd
|
||||
btfsc RX_FLAGS,RX_DATA
|
||||
bra GotData
|
||||
btfsc RX_FLAGS,RX_ABRT
|
||||
bcf RX_FLAGS,RX_ABRT
|
||||
btfsc TX_FLAGS,TX_COL
|
||||
bra GotCollision
|
||||
bra Main
|
||||
|
||||
MouseTalk0
|
||||
movf FSR0L,W ;If the UART receiver queue is empty, we have
|
||||
xorwf FSR1L,W ; no data for either mouse or keyboard, so bail
|
||||
btfsc STATUS,Z ; "
|
||||
movf FSR0L,W ;If the keyboard queue is not empty, we have
|
||||
xorwf FSR1L,W ; data for the keyboard, so effect a service
|
||||
btfss STATUS,Z ; request so the computer knows to poll the
|
||||
call ServiceRequest ; keyboard
|
||||
btfss DV_FLAGS,DV_MSES;If the mouse doesn't need service, we're done
|
||||
bra Main ; "
|
||||
btfss INDF1,3 ;If the byte on the top of the queue has bit 3
|
||||
call ServiceRequest ; clear (keyboard data) effect a service
|
||||
btfss INDF1,3 ; request condition and send no data so the
|
||||
bra Main ; computer polls the keyboard instead
|
||||
bra Talk0FromQueue
|
||||
bcf DV_FLAGS,DV_MSES;Clear the mouse-needs-service flag
|
||||
movlb 1 ;If our handler ID is set to 4, reply using the
|
||||
movf MSE_3_L,W ; literal bytes last handed to us by the host,
|
||||
xorlw 4 ; else use the classic mouse protocol to hand
|
||||
btfsc STATUS,Z ; over a delta Y and a delta X
|
||||
bra MouseTalk0_H4 ; "
|
||||
;fall through
|
||||
|
||||
MouseTalk0_H1
|
||||
MT0Y movlb 1 ;We handle the Y delta differently depending on
|
||||
btfsc MSE_DYH,7 ; whether it's negative or positive
|
||||
bra MT0YNeg ; "
|
||||
MT0YPos movlw 0xC1 ;If it's positive, subtract 63 from it
|
||||
addwf MSE_DYL,F ; "
|
||||
movlw 0xFF ; "
|
||||
addwfc MSE_DYH,F ; "
|
||||
btfsc STATUS,C ;If it didn't borrow, leave the difference,
|
||||
bra MT0YPMo ; it's more than we can convey in one delta
|
||||
movlw B'00111111' ;If it borrowed, add 63 to the difference and
|
||||
addwf MSE_DYL,W ; that's our final delta
|
||||
movwf ADB_BUF ; "
|
||||
clrf MSE_DYH ; "
|
||||
clrf MSE_DYL ; "
|
||||
bra MT0X ;Go to handle the X delta
|
||||
MT0YPMo movlw B'00111111' ;If it didn't borrow, send the delta 63 and
|
||||
movwf ADB_BUF ; signal that we need to be serviced again to
|
||||
bsf DV_FLAGS,DV_MSES; convey the rest of it
|
||||
bra MT0X ;Go to handle the X delta
|
||||
MT0YNeg movlw 0x40 ;If it's negative, add 64 to it
|
||||
addwf MSE_DYL,F ; "
|
||||
movlw 0 ; "
|
||||
addwfc MSE_DYH,F ; "
|
||||
btfss STATUS,C ;If it didn't overflow, leave the sum, it's
|
||||
bra MT0YNMo ; more than we can convey in one delta
|
||||
movlw B'01000000' ;If it overflowed, add -64 to the sum and
|
||||
addwf MSE_DYL,W ; that's our final delta
|
||||
movwf ADB_BUF ; "
|
||||
clrf MSE_DYL ; "
|
||||
bra MT0X ;Go to handle the X delta
|
||||
MT0YNMo movlw B'01000000' ;If it didn't overflow, send the delta -64 and
|
||||
movwf ADB_BUF ; signal that we need to be serviced again to
|
||||
bsf DV_FLAGS,DV_MSES; convey the rest of it
|
||||
MT0X btfsc MSE_DXH,7 ;We handle the X delta differently depending on
|
||||
bra MT0XNeg ; whether it's negative or positive
|
||||
MT0XPos movlw 0xC1 ;If it's positive, subtract 63 from it
|
||||
addwf MSE_DXL,F ; "
|
||||
movlw 0xFF ; "
|
||||
addwfc MSE_DXH,F ; "
|
||||
btfsc STATUS,C ;If it didn't borrow, leave the difference,
|
||||
bra MT0XPMo ; it's more than we can convey in one delta
|
||||
movlw B'00111111' ;If it borrowed, add 63 to the difference and
|
||||
addwf MSE_DXL,W ; that's our final delta
|
||||
movwf ADB_BUF2 ; "
|
||||
clrf MSE_DXH ; "
|
||||
clrf MSE_DXL ; "
|
||||
bra MT0Btns ;Go to handle the X delta
|
||||
MT0XPMo movlw B'00111111' ;If it didn't borrow, send the delta 63 and
|
||||
movwf ADB_BUF2 ; signal that we need to be serviced again to
|
||||
bsf DV_FLAGS,DV_MSES; convey the rest of it
|
||||
bra MT0Btns ;Go to handle the X delta
|
||||
MT0XNeg movlw 0x40 ;If it's negative, add 64 to it
|
||||
addwf MSE_DXL,F ; "
|
||||
movlw 0 ; "
|
||||
addwfc MSE_DXH,F ; "
|
||||
btfss STATUS,C ;If it didn't overflow, leave the sum, it's
|
||||
bra MT0XNMo ; more than we can convey in one delta
|
||||
movlw B'01000000' ;If it overflowed, add -64 to the sum and
|
||||
addwf MSE_DXL,W ; that's our final delta
|
||||
movwf ADB_BUF2 ; "
|
||||
clrf MSE_DXL ; "
|
||||
bra MT0Btns ;Go to handle the X delta
|
||||
MT0XNMo movlw B'01000000' ;If it didn't overflow, send the delta -64 and
|
||||
movwf ADB_BUF2 ; signal that we need to be serviced again to
|
||||
bsf DV_FLAGS,DV_MSES; convey the rest of it
|
||||
MT0Btns btfsc MS4_0_1,7 ;Copy the mouse button bits from the handler 4
|
||||
bsf ADB_BUF,7 ; data
|
||||
btfsc MS4_0_2,7 ; "
|
||||
bsf ADB_BUF2,7 ; "
|
||||
bsf TX_FLAGS,TX_RDY ;Signal the transmitter that we're ready to
|
||||
bcf TX_FLAGS,TX_SIZ2; transmit two bytes
|
||||
bcf TX_FLAGS,TX_SIZ1; "
|
||||
bsf TX_FLAGS,TX_SIZ0; "
|
||||
movlw B'11111111' ;Overwrite the bytes for handler 4 register 0
|
||||
movwf MS4_0_1 ; with ones so the mouse buttons can be
|
||||
movwf MS4_0_2 ; released
|
||||
movwf MS4_0_3 ; "
|
||||
movwf MS4_0_4 ; "
|
||||
movwf MS4_0_5 ; "
|
||||
bra Main
|
||||
|
||||
MouseTalk0_H4
|
||||
movf MS4_0_1,W ;Copy the bytes for register 0 last handed to
|
||||
movwf ADB_BUF ; us by the host into the ADB buffer
|
||||
movf MS4_0_2,W ; "
|
||||
movwf ADB_BUF2 ; "
|
||||
movf MS4_0_3,W ; "
|
||||
movwf ADB_BUF3 ; "
|
||||
movf MS4_0_4,W ; "
|
||||
movwf ADB_BUF4 ; "
|
||||
movf MS4_0_5,W ; "
|
||||
movwf ADB_BUF5 ; "
|
||||
movlw B'11111111' ;Overwrite the bytes for register 0 with ones
|
||||
movwf MS4_0_1 ; so the mouse buttons can be released
|
||||
movwf MS4_0_2 ; "
|
||||
movwf MS4_0_3 ; "
|
||||
movwf MS4_0_4 ; "
|
||||
movwf MS4_0_5 ; "
|
||||
bsf TX_FLAGS,TX_RDY ;Signal the transmitter that we're ready to
|
||||
bsf TX_FLAGS,TX_SIZ2; transmit five bytes
|
||||
bcf TX_FLAGS,TX_SIZ1; "
|
||||
bcf TX_FLAGS,TX_SIZ0; "
|
||||
bra Main
|
||||
|
||||
MouseTalk1
|
||||
movlb 1 ;If our handler ID is not set to 4, we have no
|
||||
movf MSE_3_L,W ; register 1 to talk, so we're done
|
||||
xorlw 4 ; "
|
||||
btfss STATUS,Z ; "
|
||||
bra Main ; "
|
||||
movlw 0 ;We have no unique identifier as assigned by
|
||||
movwf ADB_BUF ; Apple, so give all zeroes instead
|
||||
movwf ADB_BUF2 ; "
|
||||
movwf ADB_BUF3 ; "
|
||||
movwf ADB_BUF4 ; "
|
||||
movwf ADB_BUF5 ;Our device resolution is nominally 96 units
|
||||
movlw 96 ; per inch, pretend we are a graphics tablet
|
||||
movwf ADB_BUF6 ; the exact size of the mac's monitor
|
||||
movlw 0 ;We are a graphics tablet, absolute positioned
|
||||
movwf ADB_BUF7 ; "
|
||||
movlw 8 ;And we have 8 buttons
|
||||
movwf ADB_BUF8 ; "
|
||||
movlw B'10000111' ;Signal that we're ready to transmit 8 bytes
|
||||
iorwf TX_FLAGS,F ; "
|
||||
bra Main
|
||||
|
||||
MouseTalk3
|
||||
movlb 1 ;Move the high byte of mouse register 3 into
|
||||
|
|
@ -718,7 +910,7 @@ KeyboardL3_00
|
|||
bra Main
|
||||
|
||||
KeyboardL3_FE
|
||||
btfsc COLLISN,COL_KBD ;If there was a collision, do not change the
|
||||
btfsc DV_FLAGS,DV_KBDC;If there was a collision, do not change the
|
||||
bra KL3FENo ; address
|
||||
movlw B'00001111' ;Snuff the top nibble of the first data byte,
|
||||
andwf ADB_BUF,F ; we don't care about those bits
|
||||
|
|
@ -727,7 +919,7 @@ KeyboardL3_FE
|
|||
andlw B'11110000' ; "
|
||||
iorwf ADB_BUF,W ; "
|
||||
movwf KBD_3_H ; "
|
||||
KL3FENo bcf COLLISN,COL_KBD ;Clear the collision flag if it was set
|
||||
KL3FENo bcf DV_FLAGS,DV_KBDC;Clear the collision flag if it was set
|
||||
bra Main
|
||||
|
||||
KeyboardL3ChgH
|
||||
|
|
@ -748,6 +940,12 @@ MouseListen
|
|||
addlw 2 ;If the low byte of the listen register 3 data
|
||||
btfsc STATUS,Z ; is 0xFE, handle this
|
||||
bra MouseL3_FE ; "
|
||||
addlw 250 ;If the low byte of the listen register 3 data
|
||||
btfsc STATUS,Z ; is 0x01 or 0x04, these are handler IDs that
|
||||
bra MouseL3ChgH ; we (as an extended mouse) understand, so
|
||||
addlw 3 ; change our handler ID accordingly
|
||||
btfsc STATUS,Z ; "
|
||||
bra MouseL3ChgH ; "
|
||||
bra Main
|
||||
|
||||
MouseL3_00
|
||||
|
|
@ -757,7 +955,7 @@ MouseL3_00
|
|||
bra Main
|
||||
|
||||
MouseL3_FE
|
||||
btfsc COLLISN,COL_MSE ;If there was a collision, do not change the
|
||||
btfsc DV_FLAGS,DV_MSEC;If there was a collision, do not change the
|
||||
bra ML3FENo ; address
|
||||
movlw B'00001111' ;Snuff the top nibble of the first data byte,
|
||||
andwf ADB_BUF,F ; we don't care about those bits
|
||||
|
|
@ -766,7 +964,13 @@ MouseL3_FE
|
|||
andlw B'11110000' ; "
|
||||
iorwf ADB_BUF,W ; "
|
||||
movwf MSE_3_H ; "
|
||||
ML3FENo bcf COLLISN,COL_MSE ;Clear the collision flag if it was set
|
||||
ML3FENo bcf DV_FLAGS,DV_MSEC;Clear the collision flag if it was set
|
||||
bra Main
|
||||
|
||||
MouseL3ChgH
|
||||
movf ADB_BUF2,W ;Change our handler ID (the low byte of
|
||||
movlb 1 ; register 3) to the byte given in the listen
|
||||
movwf MSE_3_L ; register 3 command
|
||||
bra Main
|
||||
|
||||
GotCollision
|
||||
|
|
@ -776,17 +980,13 @@ GotCollision
|
|||
xorwf KBD_3_H,W ; match, this is a collision on the keyboard's
|
||||
andlw B'00001111' ; address
|
||||
btfsc STATUS,Z ; "
|
||||
bsf COLLISN,COL_KBD ; "
|
||||
bsf DV_FLAGS,DV_KBDC; "
|
||||
swapf ADB_CMD,W ;Compare the address of the last command with
|
||||
xorwf MSE_3_H,W ; the stored address for the mouse; if they
|
||||
andlw B'00001111' ; match, this is a collision on the mouse's
|
||||
btfsc STATUS,Z ; address
|
||||
bsf COLLISN,COL_MSE ; "
|
||||
bra Main
|
||||
|
||||
GotDataEnd
|
||||
bcf RX_FLAGS,RX_ABRT
|
||||
bra Main
|
||||
bsf DV_FLAGS,DV_MSEC; "
|
||||
goto Main
|
||||
|
||||
|
||||
;;; Subprograms ;;;
|
||||
|
|
@ -803,6 +1003,11 @@ ServiceRequest
|
|||
andwf TRISA,F ; "
|
||||
return
|
||||
|
||||
UpdateKeyboard2
|
||||
btfsc WREG,7 ;If MSB is set, a key has been released, else
|
||||
bra Update2KeyUp ; one has been pressed
|
||||
;fall through
|
||||
|
||||
Update2KeyDown
|
||||
addlw -51 ;0x33 Delete/Backspace
|
||||
btfsc STATUS,Z ; if keycode matches,
|
||||
|
|
@ -840,7 +1045,7 @@ Update2KeyDown
|
|||
addlw -2 ;0x7F Reset
|
||||
btfsc STATUS,Z ; if keycode matches,
|
||||
bcf KBD_2_H,K2H_RST ; mark key as down
|
||||
return
|
||||
bra Update2Mods
|
||||
|
||||
Update2KeyUp
|
||||
andlw B'01111111' ;Clear MSB so we can check released key's code
|
||||
|
|
@ -880,7 +1085,7 @@ Update2KeyUp
|
|||
addlw -2 ;0x7F Reset
|
||||
btfsc STATUS,Z ; if keycode matches,
|
||||
bsf KBD_2_H,K2H_RST ; mark key as up
|
||||
return
|
||||
;fall through
|
||||
|
||||
Update2Mods
|
||||
bsf KBD_2_H,K2H_CTL ;If either control key is down, reflect that in
|
||||
|
|
|
|||
Loading…
Reference in New Issue