Single board computer using 8086 pcb
greetings mates ...im new to pcb making and im designing sbc in diptrace but having problems in routing data lines and address lines of 8086 of same size can anyone guide me how to do tht...or there is any other software more suitable for this job....plz reply..i have attached schematic which i designed in diptrace
Last edited by aflatoon1989; 14th April 2009 at 06:57 PM.
That'll be a tough PCB to route. How many layers are you using?
single layer ya thts the tough task
It would be tough with two layers. Why not just wire wrap it or find an old PC XT?
single layer, you must be joking, if yes, how many links...Originally Posted by aflatoon1989
single layer ya thts the tough task
why must it be single layer.?
Eric " Good enough is Perfect "
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lolzz thts the good idea but cant do it .....coz my teacher give me this task and i have to do it...
Good luck.
IMO the task is unfair and totally unrealistic.
Surely there must a more useful project for you to study.
Eric " Good enough is Perfect "
I will NOT answer PM's requesting technical help, please use the Forum
PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/
Link to my Articles: http://www.electro-tech-online.com/a...icgibbs-55450/
im working on it its done only 25% ....lets see if its really impossible then i will convert it to double layer pcb.....
I remember a wire wrapped 8088 from the 8088 book.
Aflatoon some advice.
If you really understand how the circuit works you can make changes that help.
On static RAM there is no reason to use A0, A1, A2,... You can mix up A0 and A6 and there is no problem. I change the sch to make the layout easy.
On static RAM you can change D0--D7.
On the PLACE16V8 you can move around any input to any input pin. Also the outputs can be moved to different pins. The part must be reprogrammed but that is a small problem.
The 74LS573 and like parts. This is a 8 bit latch. Pins 2->19 is a latch. Pins 3->18 is a latch. You can exchange pin pairs 2,19 and 2,18.
Do no do this unless you really know the circuit!
You might be able to route it using a lot of headers and IDC cables. By no means an easy solution because you'd have to hand route the whole thing. But doing headers and cables eliminates a lot of routing problems. A lot of cheap single layer boards I see use judicious amounts of jumper wire. IDC cables on headers or just soldering ribbon cable directly to the PCB would work.
Last edited by Sceadwian; 14th April 2009 at 10:10 PM.
"Because I be what I be. I would tell you what you want to know if I
could, mum, but I be a cat, and no cat anywhere ever gave anyone a
straight answer, har har."
If this is the entire circuit you are missing about 20 bypass capacitors.
yup i divided it in 3 parts in is of i/o card ,ram,rom section,,and microprocessor section...lets see how far it can solve my prob....thanks for ur advice 'Sceadwian'
8088 singleboard
I'm coming in late, but I thought I'd share my 8088 SBC
layout. It's an 8 Mhz XT clone 5" x 7.25 " two sided board.
512K ram, 512K eprom, Interrupt controller, timer, 8251 serial port with MAX 232 level converter, 8255 parallel I/O,
etc.
It is hand routed.
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