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;
;=======================================================================
; Mouse Information Utility (MSEINFO)
;=======================================================================
;
; Simple utility that attempts to determine the status of the mouse you
; have attached to an 8242 keyboard controller.
;
; Based on Wayne Warthen's KBDINFO program, Thanks to his great work
; on RomWBW and support to the Retrobrewcomputers community at large
;
; Additional help from these websites
; https://isdaman.com/alsos/hardware/mouse/ps2interface.htm
;
; Second PS/2 write data port info from
; https://wiki.osdev.org/%228042%22_PS/2_Controller#Second_PS.2F2_Port
;
; PS/2 Mouse initialization code in C
; http://bos.asmhackers.net/docs/mouse/snippet_2/mouse.inc
;
;=======================================================================
;
; Mouse controller port addresses (adjust as needed)
;
iocmd .equ $E3 ; keyboard controller command port address
iodat .equ $E2 ; keyboard controller data port address
;
; General operational equates (should not requre adjustment)
;
stksiz .equ $40 ; Working stack size
;
timeout .equ $00 ; Controller timeout constant
;
restart .equ $0000 ; CP/M restart vector
bdos .equ $0005 ; BDOS invocation vector
;
;=======================================================================
;
.org $100 ; standard CP/M executable
;
;
; setup stack (save old value)
ld (stksav),sp ; save stack
ld sp,stack ; set new stack
;
call crlf
ld de,str_banner ; banner
call prtstr
;
call main ; do the real work
;
exit:
call crlf2
ld de,str_exit
call prtstr
;call crlf
; clean up and return to command processor
call crlf ; formatting
ld sp,(stksav) ; restore stack
jp restart ; return to CP/M via restart
;
;
;=======================================================================
; Main Program
;=======================================================================
;
main:
;
; Display active mouse controller port addresses
;
call crlf2
ld de,str_cmdport
call prtstr
ld a,iocmd
call prthex
call crlf
ld de,str_dataport
call prtstr
ld a,iodat
call prthex
;
; Attempt self-test command on mouse controller
;
; Mouse controller should respond with an 0x55 on data port
; after being sent a 0xAA on the command port.
;
call crlf2
ld de,str_ctrl_test
call prtstr
ld a,$aa ; self-test command
call put_cmd_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg
jp c,err_ctlr_io ; handle controller error
cp $55 ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
;
; Send 0xA8 Mouse Enable command to 8242 controller
;
call crlf2
ld de,str_enable_mouse
call prtstr
ld a,$a8 ; Send Mouse Enable command to 8242
call put_cmd_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for self-test status
jp c,err_ctlr_io ; handle controller error
cp $AA ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
cp $00 ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
;
; Disable translation on keyboard controller to get raw scan codes! Enable Mouse
;
; call crlf2
; ld de,str_trans_off
; call prtstr
; ld a,$60 ; write to command register 0
; call put_cmd_dbg
; jp c,err_ctlr_io ; handle controller error
; ld a,$00 ; xlat disabled, mouse enabled, no ints
; call put_cmd_dbg
; jp c,err_ctlr_io ; handle controller error
; Attempt four reset commands on mouse controller
;
call crlf2
ld de,str_mse_init
call prtstr
; Reset Pass #1
ld a,$ff ; Send Mouse Reset command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
call get_data_dbg ; Read Mouse for self-test status
jp c,err_ctlr_io ; handle controller error
cp $AA ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
cp $00 ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
; Reset Pass #2
ld a,$ff ; Send Mouse Reset command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
call get_data_dbg ; Read Mouse for self-test status
jp c,err_ctlr_io ; handle controller error
cp $AA ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
cp $00 ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
; Reset Pass #3
ld a,$ff ; Send Mouse Reset command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
call get_data_dbg ; Read Mouse for self-test status
jp c,err_ctlr_io ; handle controller error
cp $AA ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
cp $00 ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
; Reset Pass #4
ld a,$ff ; Send Mouse Reset command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
call get_data_dbg ; Read Mouse for self-test status
jp c,err_ctlr_io ; handle controller error
cp $AA ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
cp $00 ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
; Begin setting mouse parameters, Request Microsoft Scrolling Mouse Mode
ld a,$f3 ; Send Set Sample Rate command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$c8 ; Send Decimal 200 command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$f3 ; Send Set Sample Rate command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$64 ; Send Decimal 100 command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$f3 ; Send Set Sample Rate command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$50 ; Send Decimal 80 command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$f2 ; Send Read Device Type command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
cp $03 ; detect MS Intellimouse/Microsoft Scrolling Mouse
jp z,Intellimouse
cp $00 ; expected value? ($00 if Regular PS/2 Mouse)
jp z,ReadMouseID
Intellimouse:
call crlf
ld de,str_intellimouse_ok
call prtstr
ReadMouseID:
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld a,$f3 ; Send Set Sample Rate command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$0a ; Send Decimal 10 command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$f2 ; Send Read Device Type command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
cp $03 ; detect MS Intellimouse/Microsoft Scrolling Mouse
jp z,Intellimouse2
cp $00 ; expected value? ($00 if Regular PS/2 Mouse)
jp z,ReadMouseID2
Intellimouse2:
call crlf
ld de,str_intellimouse_ok
call prtstr
ReadMouseID2:
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld a,$e8 ; Send Set Resolution command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$03 ; Send 8 Counts/mm command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$e6 ; Send Set Scaling 1:1 command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$f3 ; Send Set Sample Rate command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$28 ; Send Decimal 40 command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
ld a,$f4 ; Send Enable command
call put_data_dbg
jp c,err_ctlr_io ; handle controller error
call get_data_dbg ; Read Mouse for Acknowledge
jp c,err_ctlr_io ; handle controller error
cp $fa ; expected value?
jp nz,err_ctlr_test ; handle self-test error
call crlf
ld de,str_ctrl_test_ok
call prtstr
; Initialization Complete
ReadMousePackets:
; call check_read
; jp nz, ReadMousePackets
call get_data_dbg ; Read Mouse for self-test status
jp c,err_ctlr_io ; handle controller error
call crlf
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
call crlf
call get_data_dbg ; Read Mouse for Mouse ID
jp c,err_ctlr_io ; handle controller error
call crlf
call crlf
jp ReadMousePackets
;
done:
ret
;
;=======================================================================
; Mouse Controller I/O Routines
;=======================================================================
;
wait_write:
;
; Wait for mouse controller to be ready for a write
; A=0 indicates success (ZF set)
;
ld b,timeout ; setup timeout constant
wait_write1:
in a,(iocmd) ; get status
ld c,a ; save status
and $02 ; isolate input buf status bit
ret z ; 0 means ready, all done
call delay ; wait a bit
djnz wait_write1 ; loop until counter exhausted
ld de,str_timeout_write ; write timeout message
call crlf
call prtstr
ld a,c ; recover last status value
call prthex
or $ff ; signal error
ret
;
wait_read:
;
; Wait for mouse controller to be ready to read a byte
; A=0 indicates success (ZF set)
;
ld b,timeout ; setup timeout constant
wait_read1:
in a,(iocmd) ; get status
ld c,a ; save status
and $01 ; isolate input buf status bit
xor $01 ; invert so 0 means ready
ret z ; if 0, all done
call delay ; wait a bit
djnz wait_read1 ; loop until counter exhausted
ld de,str_timeout_read ; write timeout message
call crlf
call prtstr
ld a,c ; recover last status value
call prthex
or $ff ; signal error
ret
;
check_read:
;
; Check for data ready to read
; A=0 indicates data available (ZF set)
;
in a,(iocmd) ; get status
and $01 ; isolate input buf status bit
xor $01 ; invert so 0 means ready
ret
;
put_cmd:
;
; Put a cmd byte from A to the mouse interface with timeout
; CF set indicates timeout error
;
ld e,a ; save incoming value
call wait_write ; wait for controller ready
jr z,put_cmd1 ; if ready, move on
scf ; else, signal timeout error
ret ; and bail out
put_cmd1:
ld a,e ; recover value to write
out (iocmd),a ; write it
or a ; clear CF for success
ret
;
put_cmd_dbg:
call put_cmd
ret c
push af
call crlf
ld de,str_put_cmd
call prtstr
call prthex
pop af
ret
;
put_data:
;
; Put a data byte from A to the mouse interface with timeout
; CF set indicates timeout error
;
; note: direct data to second PS/2 port, send $d4 to 8242 command register
; different than keyboard which uses first PS/2 port
push af ; save contents of a
ld e,a ; save incoming value
call wait_write ; wait for controller ready
jr z,put_data0 ; if ready, move on
scf ; else, signal timeout error
ret ; and bail out
put_data0:
ld a,$d4 ; direct to second PS/2 port for mouse
out (iocmd),a ; send second port command to 8242
pop af
; rest of put_data is the same as for PS/2 keyboard
ld e,a ; save incoming value
call wait_write ; wait for controller ready
jr z,put_data1 ; if ready, move on
scf ; else, signal timeout error
ret ; and bail out
put_data1:
ld a,e ; recover value to write
out (iodat),a ; write it
or a ; clear CF for success
ret
;
put_data_dbg:
call put_data
ret c
push af
call crlf
ld de,str_put_data
call prtstr
call prthex
pop af
ret
;
; Get a data byte from the mouse interface to A with timeout
; CF set indicates timeout error
;
get_data:
;
call wait_read ; wait for byte to be ready
jr z,get_data1 ; if ready, move on
scf ; else signal timeout error
ret ; and bail out
get_data1:
in a,(iodat) ; get data byte
or a ; clear CF for success
ret
;
get_data_dbg:
call get_data
ret c
push af
call crlf
ld de,str_get_data
call prtstr
call prthex
pop af
ret
;
; Error Handlers
;
err_ctlr_io:
ld de,str_err_ctrl_io
jr err_ret
;
err_ctlr_test:
ld de,str_err_ctrl_test
jr err_ret
;
err_mse_reset:
ld de,str_err_mse_reset
jr err_ret
;
err_ret:
call crlf2
call prtstr
or $ff ; signal error
ret
;
;=======================================================================
; Utility Routines
;=======================================================================
;
;
; Print character in A without destroying any registers
;
prtchr:
push bc ; save registers
push de
push hl
ld e,a ; character to print in E
ld c,$02 ; BDOS function to output a character
call bdos ; do it
pop hl ; restore registers
pop de
pop bc
ret
;
prtdot:
;
; shortcut to print a dot preserving all regs
push af ; save af
ld a,'.' ; load dot char
call prtchr ; print it
pop af ; restore af
ret ; done
;
; Print a zero terminated string at (de) without destroying any registers
;
prtstr:
push af
push de
;
prtstr1:
ld a,(de) ; get next char
or a
jr z,prtstr2
call prtchr
inc de
jr prtstr1
;
prtstr2:
pop de ; restore registers
pop af
ret
;
; Print the value in A in hex without destroying any registers
;
prthex:
push af ; save AF
push de ; save DE
call hexascii ; convert value in A to hex chars in DE
ld a,d ; get the high order hex char
call prtchr ; print it
ld a,e ; get the low order hex char
call prtchr ; print it
pop de ; restore DE
pop af ; restore AF
ret ; done
;
; print the hex word value in hl
;
prthexword:
push af
ld a,h
call prthex
ld a,l
call prthex
pop af
ret
;
; print the hex dword value in de:hl
;
prthex32:
push bc
push de
pop bc
call prthexword
push hl
pop bc
call prthexword
pop bc
ret
;
; Convert binary value in A to ascii hex characters in DE
;
hexascii:
ld d,a ; save A in D
call hexconv ; convert low nibble of A to hex
ld e,a ; save it in E
ld a,d ; get original value back
rlca ; rotate high order nibble to low bits
rlca
rlca
rlca
call hexconv ; convert nibble
ld d,a ; save it in D
ret ; done
;
; Convert low nibble of A to ascii hex
;
hexconv:
and $0F ; low nibble only
add a,$90
daa
adc a,$40
daa
ret
;
; Print value of A or HL in decimal with leading zero suppression
; Use prtdecb for A or prtdecw for HL
;
prtdecb:
push hl
ld h,0
ld l,a
call prtdecw ; print it
pop hl
ret
;
prtdecw:
push af
push bc
push de
push hl
call prtdec0
pop hl
pop de
pop bc
pop af
ret
;
prtdec0:
ld e,'0'
ld bc,-10000
call prtdec1
ld bc,-1000
call prtdec1
ld bc,-100
call prtdec1
ld c,-10
call prtdec1
ld e,0
ld c,-1
prtdec1:
ld a,'0' - 1
prtdec2:
inc a
add hl,bc
jr c,prtdec2
sbc hl,bc
cp e
ret z
ld e,0
call prtchr
ret
;
; Start a new line
;
crlf2:
call crlf ; two of them
crlf:
push af ; preserve AF
ld a,13 ; <CR>
call prtchr ; print it
ld a,10 ; <LF>
call prtchr ; print it
pop af ; restore AF
ret
;
; Brief delay
;
delay:
push bc
ld b,0
delay1:
ex (sp),hl
ex (sp),hl
ex (sp),hl
ex (sp),hl
ex (sp),hl
ex (sp),hl
ex (sp),hl
ex (sp),hl
djnz delay1
pop bc
ret
;
;=======================================================================
; Constants
;=======================================================================
;
str_banner .db "Mouse Information, v0.1",0
str_exit .db "Done, Thank you for using MSEINFO!",0
str_cmdport .db "Mouse Controller Command Port: 0x",0
str_dataport .db "Mouse Controller Data Port: 0x",0
str_timeout_write .db "Mouse Controller Write Timeout, Status: 0x",0
str_timeout_read .db "Mouse Controller Read Timeout, Status: 0x",0
str_err_ctrl_io .db "Mouse Controller I/O Failure",0
str_err_ctrl_test .db "Mouse Controller Self-Test Failed",0
str_put_cmd .db "Sent Command 0x",0
str_put_data .db "Sent Data 0x",0
str_get_data .db "Got Data 0x",0
str_ctrl_test .db "Attempting Controller Self-Test",0
str_mse_init .db "Attempting Mouse Initialization",0
str_enable_mouse .db "Enabling Mouse in 8242 Controller",0
str_ctrl_test_ok .db "Controller Self-Test OK",0
str_intellimouse_ok .db "MS Intellimouse OK",0
str_trans_off .db "Disabling Controller Translation",0
str_mse_reset .db "Attempting Mouse Reset",0
str_mse_reset_ok .db "Mouse Reset OK",0
str_err_mse_reset .db "Mouse Reset Failed",0
;
;=======================================================================
; Working data
;=======================================================================
;
stksav .dw 0 ; stack pointer saved at start
.fill stksiz,0 ; stack
stack .equ $ ; stack top
;
workbuf .fill 8
workbuf_len .db 0
;
;=======================================================================
;
.end