HP Vectra Technical Reference Manual page 477

RS-232 Mouse Driver
.***.* ••••••• * ••••••••• **
STRATEGY ENTRY POINT
* •••• ** •• *.***** ••• ***.*
.••••• *••• ** •••••••• ** ••
INTERRUPT ENTRY POINT
.* ••• *.*.* •• **.* •••• *.**
OEV_INTERRUPT PROC FAR
ES:OI.
Set ISR Ev.nt r.cord data type to 18 bit
r e 1 at
i
ve mo t ion .
Get vector number of mou •• •• POlO.
Set ES:O to driver h•• der.
;Select ISR function.
;We're palling this on to
the
INPUT driv.r.
; Inte rruptl ar • • uppo •• d to be off.
;Turn interrupt.
back
on now.
;S&t up our local stack
;Stack legment 1s ,ame .. code (CS)
;Re-enable interrupti
;Convert command into jump table offset.
;D1Iable interrupts while we're m.ssing with stack.
;Store existing stack environment.
END OF RESIDENT COOE
* ••••••••••••••••••••••••
INITIALIZATION CODE •••••••
* ••••••••••••••• " ••
ES: [01] .RH STATUS, MASK ERROR ;Set .rror flag in return Itatul word.
ES:[OI].RH:=STATUS, MSD_UNKNCAJlN_CMO ;Set error code.
DI,CS
OS,OI
FROM REQUEST HEADER
OI,DWORD PTR REO HOR OFF ;Move addrell of request header into
:t:
~~6 [~~tTRH_O«)
_CooE
:~: ~
f
~ ~~~~~g~Y ~ ~e: ~
0:
n ~~ ~~~
nd by t
e.
BAD
cM15
AL ,~SO REM MED IA
BAO_Cto«) -
MeV S I ,OF F SE T STACK._PTR
MeV
!~I~.SP
ADD
MOV
(sf] .ss
MeV SP,OFFSET
cs:
STACK_ TOP
MeV AX ,CS
MeV SS ,AX
STI
; FETCH COMMAND
LES
MeV
CMP
JB
CMP
JA
CBW
SHL AX,l
MeV BX, AX
JMP
C~_TABLE(BX]
;Oispatch to requested function.
; EXIT POINT FOR BAD OR UNSUPPORTED FUNCTIONS
; SAVE MACHINE STATE
PUSHF
CLD
PUSHA
MOV
MeV
.••••• ** ••• **.* •••• *** ••
p~~~
••••••••••••••••••••
.*.**.****** ••• * ••• **.** ••••• *** •••••• *•••••• *,,*,,***** •• *.**.*.".***.***.
~
*
MS-DOS DR IVER CODE •
:**.*.*****.************* •• ********.*** •••• *.****************.***.*******
BAD CMD:
UNSUP POR T_ CMD :
OR
OR
INIT _CODE
; SET UP lOCAL STACK
ClI
;COMMON EXIT POINT
EXIT: OR ES:[OI].RH_STATUS, MASK DONE ;Set return Itatul to don •.
POPA ; Res tor ere
9 is
t
e
r
S .
:~~F ;::;~~~et~1~~~6os.
OEV STRATEGY PROC FAR
- MeV CS : REO HDR OFF, 8X
MeV CS: REO:=I-iDR=:SEG. ES
RET
DEV_STRATEGY ENOP
;Cr.at. mo t ion ISR event
r.c
0
rd
0248 86 41
MeV OH.T_REL16
0240 2E SA 16 0151
R
MeV
OL. PGIO_VECT_NUM
0252 8C C8
MeV
AX.CS
0254
40 INC
AX
0255 SE CO
MeV ES,AX
0257 84 00
MeV AH, F ISR
0259 80 002A
MeV BP, V:=SINPUT
025C FA
CLI
0250
CO 6F INT
HP_ENTRY
025F F8
STI
; RESTORE MACHINE STATE AND EXIT
0260 07
MSI_S: POP
ES
0261 IF POP
OS
0262 61
POPA
0263
90 POPF
0264
CF IRET
PAGE
0265
0265 2E 89 IE 0050
026A
2E: 8C
06
0052
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0270
0270
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0271 FC
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DF
0277 2E: C4 3E OOSO
027C 26 : 8A 45 02
0280 3C 00
0282 72 DE
0284 3C OF
0286 77 OA
0288 9!!
0289 01 EO
028B 88 08
0280 2£: FF A7 0152 R
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0298 26. 81 40 03 0003
029E 26 81 40 03 0100
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02A6
CB
02Al
02A
7
FA
02A8 BE 0124 R
02AB
89
24
C2AD 83 CEl 02
0280 8C 14
0282 BC 0511 R
0285
8C C8
0287 8E
DO
0289 FB
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~ 55
468 Driver Writer's Guide