home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Columbia Kermit
/
kermit.zip
/
archives
/
ti990.tar.gz
/
ti990.tar
/
ti990.set
< prev
next >
Wrap
Text File
|
1988-08-16
|
2KB
|
61 lines
*
IDT 'SETPDT'
*
* The 931 DSR and CI403 board have been established as the
* mechanisms for any remote system and/or modem connection.
* It may be possible for a 931 port of a CI403 to be in an
* uninitialized state. This condition results from POWERUP
* occurring without a terminal connected to the port, and/or
* from disconnecting a device from the same port. Then
* as a task attempts to open the port for I/O, the open hangs
* or fails(e.g. DX10 KERMIT opening the port for remote I/O) -
* even with a modem or remote system connected to the port and with
* proper signals set. The solution is to set the proper bits in the
* PDT for the device (remote port) forcing the port to be initialized.
* If an address(s) is passed to this routine that is NOT -1, then
* that address is the address of the word that needs to be modified.
* Modification will consist of setting bit 13 in the word(s).
*
* PROCEDURE SETPDT(WORD1ADDR,WORD2ADDR:INTEGER);EXTERNAL
*
*
* ORIGINAL: PAUL W. MADAUS
* MARCH 3, 1986
*
BOT EQU R9 START OF STACK FRAME
ARG EQU >28 BEGINNING OF ARGUMENT LIST
*
ADDR1 EQU ARG+0 ADDRESS OF FIRST PDT INIT WORD
ADDR2 EQU ARG+2 ADDRESS OF SECOND PDT INIT WORD
BMASK EQU >0004 THE BIT TO SET
*
MAPFIL DATA >4000,0 GOOD ENOUGH TO GET US INTO SYSTEM PDTS
*
DEF SETPDT
*
REF ENT$S,RET$S ENTRY AND RETURN ROUTINES
*
SETPDT BL @ENT$S BEGIN
DATA >32 STACK FRAME SIZE
*
MOV @ADDR1(BOT),R1 GET THE FIRST PDT WORD ADDRESS
CI R1,>FFFF VALID ADDR - i.e. CHANGE NEEDED?
JEQ TRY2 NO - TRY SECOND WORD
LDS @MAPFIL USE SYSTEM AREA MAP FILE
MOV *R1,R2 GET PDT WORD
ORI R2,BMASK SET THE BIT
LDD @MAPFIL RELOAD SYSTEM AREA MAP FILE
MOV R2,*R1 REPLACE THE MODIFIED PDT WORD
*
TRY2 MOV @ADDR2(BOT),R1 GET THE SECOND PDT WORD ADDRESS
CI R1,>FFFF VALID ADDR - i.e. CHANGE NEEDED?
JEQ BYE NO - ALL FINISHED
LDS @MAPFIL USE SYSTEM AREA MAP FILE
MOV *R1,R2 GET PDT WORD
ORI R2,BMASK SET THE BIT
LDD @MAPFIL RELOAD SYSTEM AREA MAP FILE
MOV R2,*R1 REPLACE THE MODIFIED PDT WORD
*
BYE B @RET$S RETURN TO CALLER
END