"HOW TO MAKE 6 PCB NODES RUN AT ONCE ON A 386 UNDER DESKVIEW" From the desk of Lonnie J. Rolland, 5/16/91 OVERVIEW: I am using the "E6" package from Clark Developement. I have 6 serial ports running in one 386 machine. I have taken the needed steps to give each port its own "IRQ" and "I/O" address. The 386 machine is running Qemm 5.12 and Desqview 2.26. It loads high network drivers and a hard disk cache program. I have had "zero" problems running as "Lantasti" workstation and also running multible nodes under Desqview. The machine cannot run as a network server. I got guidance from the files and the (nice) people at Clark for setting up a multi node operation via Desqview on a single 386 machine. Lots of people are doing it. The REAL barrier or problem is in getting enough and unique "IRQ"s and the "I/O" addresses. I am using a "SEFCO" four port serial card. The card came set for using interupts 2/3/4/5. I had to cut and jumper the thing to move IRQ2 over to IRQ7. I print using the network. The second serial card is a "DIO-500". I turn its game port and printer port off. Then I cut and jumper its interupts 3/4 to 10/11 on the small companion card. So for the comm ports 1 thru 6, I am using IRQs 4/3/5/7/10/11. Don't forget making I/O address all different also. Here you're at the mercy of the card manufacturer again. Of course comm 1 and 2 use I/O address 3F8 and 2F8. I used addresses 3E8 and 3E0 (the default on the sefco card) for comm 3 and 4. And I used addresses 2E8 and 2E0 (the default on the dio card) for comm 5 and 6. These two port and four port comm cards (that anybody can readily get) all plug into the lower buss. The lower buss has IRQs 3/4/5/7 available. It seems some PC/AT machines can use IRQ 2 also. I don't know what's going on there. My books tell me the second IRQ line is in use tieing the lower interupt chip to the upper interupt chip. So interupt 2 is really interupt 9. Or is it visa versa? The book says the upper IRQs 10/11/12/15 are avail -able for use on the upper buss. 컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴 This is a (crude) picture of the small board I used to plug into the PC/AT's upper, main board buss. The PC/AT lower buss is 31 edge connector traces per side. The "A" side (or traces) are on the component side of the plug in boards. The "B" side is the solder side. The upper buss is 18 edge connector traces per side. I got this little board at "ACP" on the corner of Edinger and Grand in Santa Ana, Ca. It was in the junk section in the back in a bin. It really had 25 traces and I had to hacksaw 7 off. This pcb material is super easy to hack on. Just grab a bare blade and go SLOW if you find you have to hack it down like I did. They charged my $5 bucks for the board. It had no component type stuff on it. It just had these vertical trace runs. There is a mfgr name and p/n on the card. It is "Douglas Electonics" and "6-DE-12". 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 � | | | | | | | | | | | | | | | | � � | | | | | | | | | | | | | | | | � � | | | | | | | | | | | | | | | | � � | | | | | | | | | | | | | | | | � � | | | | | | | | | | | | | | | | � � | | | | | | | | | | | | | | | | � � | | | | | | | | | | | | | | | | � � | | | | | | | | | | | | | | | | � 읕컴컴컴컴컴� | | | | | | | | | | | | | | | | 旼컴컴컴컴켸 � | | | | | | | | | | | | | | | | � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� This is another (crude) picture of both small boards I used: One to plug into the PC/AT's lower, main board buss, the other to plug into the upper main board buss. (two wires) �----------� � / \ 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 旼컴컴컴컴컴컴컴컴컴컴컴컴커 � / � � \ � � / � � \ � � / � � \ � � / � � \ � � / � � \ � � / � � \ � � / � � \ � 읕컴커 / 旼컴컴켸 읕컴컴� \ 旼컴컴� B1읕컴컴컴컴컴컴컴컴컴컴켸B31 D1읕컴컴컴컴컴컴켸D18 The "B" side or Solder side of the � The "D" side of the small DIO-500 serial port card. � card used to get the � upper interupts. Here I cut the board traces for B24 � & B25 right above the edge connector � Here I took the wire that then I followed the two IRQ board � was B24/IRQ4 and soldered it traces to their first solder feedthru � to the trace above D3. Then holes, and I soldered a wire into � I took the wire that was B25/ the two holes. I didn't use stranded � IRQ3 and soldered it to the stuff. I used 24 awg solid wire. � trace above D4. Three hands are handy. Get a helper. � � (note: D5 is IRQ12, D6 is IRQ15) � � Now, for this board, IRQ10 is used in place of IRQ4 and IRQ11 is used in place of IRQ3. GOOD LUCK! Maybe we can make a comm '6' club? Lonnie Rolland, sysop (and handy man) Symbol TSS BBS.