Just to add to the "idea pool" of minimal digit displays.

Usually i'm too lazy to wire a seven segment display to a protoboard design just to debug a value in a variable.
For that reason, i've made a small subroutine that blinks a led according to the value of a variable, For fast and ease of translation the variable is divided in its digits. Easy and fast to read.

Here is a code sample:

Code:
'["asynchronous serial protocol for human eye..."]

'[put your port configs and more here]
'---- Define Variables part
x var byte
Y var byte
n var byte

'---- Main program
main:

x = 123 'any value
gosub blinkled 'blink led according to X

goto main

'--- Subroutine part
blinkled:  'blink led on GPIO.1 according to X value
    if x > 99 then '1st digit
        y = x dig 2
        gosub blinkloop 'blink the digit
        gpio.1 = 1 'one final large blink to separate digits
        pause 1000
        gpio.1 = 0
        pause 400        
    endif
    if x > 9 then  '2nd digit
        y = x dig 1
        gosub blinkloop 'blink the digit
        gpio.1 = 1 'one final large blink to separate digits
        pause 1000
        gpio.1 = 0
        pause 400
    endif    
    y = x dig 0    '3rd digit 
    gosub blinkloop 'blink the digit
return

blinkloop: 'blink subroutine
    for n = 1 to y 
        gpio.1 = 1
        pause 100
        gpio.1 = 0
        pause 400
    next n
return
Actually i've made a wrist clock out of it with just 2 leds as a display
Enjoy