Re: Communications

 BBS: Inland Empire Archive
Date: 11-01-92 (06:36)             Number: 366
From: DICK DENNISON                Refer#: NONE
  To: BRYAN LEGGO @ 914/201         Recvd: NO  
Subj: Re: Communications             Conf: (2) Quik_Bas

BL> As for using Com 3 or 4 with the OPEN statment, you can, if you poke t
BL> Addresses for 3 or 4 into the port addresses for 1 and 2 before you

'Continuing the thread:
'Here's some com3/com4 startup code
'Dick Dennison 10/92  1:272/34

'Save vectors at bios Addresses for Com1-Com2
DEF SEG = 0
  OldPort1H = PEEK(&H400)
  OldPort1L = PEEK(&H401)
  OldPort2H = PEEK(&H402)
  OldPort2L = PEEK(&H403)

'Initialize the com1/com2 address space
 POKE &H400, &HF8
 POKE &H401, 3
 POKE &H402, &HF8
 POKE &H403, 2

'Obviously, change the baud rate to whatever
'you want up to 19200.

SELECT CASE port%
     CASE 1
        Start$ = "COM1:2400,N,8,1,DS0"
     CASE 2
        Start$ = "COM2:2400,N,8,1,DS0"
     CASE 3
        POKE &H400, &HE8   'For com1 to com3
        Start$ = "COM1:2400,N,8,1,DS0"
     CASE 4
        POKE &H402, &HE8   'For com2 to com4
        Start$ = "COM2:2400,N,8,1,DS0"
END SELECT
DEF SEG
OPEN Start$ FOR RANDOM AS 1

'Do your terminal program here

CLOSE 1

'Restore the comm address vectors
DEF SEG = 0
   POKE &H400, OldPort1H
   POKE &H401, OldPort1L
   POKE &H402, OldPort2H
   POKE &H403, OldPort2L
DEF SEG
END

--- VP [DOS] V4.09e
 * Origin: The MailMan  (914)374-3903 NY Quick Share Pt #7 *HST (1:272/34)