hi guys

i am designing a 4 bit alu with 64 bit ram and i have a problem displaying the output of the alu

it works fine with 4 leds (i only have numbers up to 15) 4 bit

i want to display the o/p on a 7segment display

so i can use 7447 or 4511 but i can only disanceplay on it numbers from 0-->9

coz its bcd so how i can cascade it to display 2 digit number (10 11 12 13 14 15)

thanks in adv

please note that i cant use eprom or pic or microprocessor

If you can lay your hands on a couple of TIL311 displays, that would do it. They had 4-bit inputs, latch, decoder, driver and display all together. The display was hexadecimal, so all you codes are covered.

Device is obsolete, but I saw a few sites on the net looked like they might have some left in stock.

please guys help me i need a solution to my problem

i cant find this TIL311 displays you told me about

is there any way to cascade 4511 or 7447 ic to display to two digit number

from 4 bit binary input

Guy on eBay is selling TIL311's for eight bucks a pop. Says he has more than 10 in stock -

TI Texas Instruments TIL311 Intelligent LED Display - eBay (item 310123443095 end time Mar-19-09 12:52:17 PDT)