Steps for Bresenham Algorithm for 1st octant:

1. Enter end points P(x1, y1) and Q(x2, y2).
2. Display x1, y1 on screen.
3. Compute dx = x2 - x1 ; and  dy = y2 - y1 ;  and p1 = 2dy - dx.
4. If p1 < 0.0, display x1 + 1, and y1, else display x1+1 and y1 + 1
5. if p1 < 0.0, p2 = p1 + 2dy else let p2 = p1 + 2dy - 2dx
6. Repeat steps 4, 5 until reach x2, y2.

The basis of the DDA (Digital Differential Analyzer) method is to take unit steps along one of the coordinate assume x co-ordinate  and compute the corresponding values along the other coordinate lets say Y co-ordinate. The unit steps Lets say m are always along the coordinate of greatest change, e.g. if we have dx = 11 and dy = 6, then we would take unit steps along x and compute the steps m along y.

Line drawing between two points (x1,y1) and (y1,y2) is accomplished by calculating intermediate positions along the line path between specified end points.

We use The Equation:-

y= m. x + b

If we have a graph and given two positions P(x1,y1) and Q(x2,y2) then we need to draw line between P and Q by calculating The each occurrence of Y! for variance in X!. This factor is known as m here. Example:

(x1=1,y1=1)&(x2=6,y2=5)

We need now to calculate all factors i.e. m and b Here

m = y2-y1 / x2-x1

So m is

SLIP is a protocol for connection to the Internet via a dial-up connection.Serial Line Internet Protocol (SLIP) is a mostly obsolete encapsulation of the Internet Protocol designed to work over serial ports and modem connections. It is documented in RFC 1055.

SLIP requires a port configuration of 8 data bits, no parity, and either EIA hardware flow control, or CLOCAL mode (3-wire null-modem) UART operation settings.

SLIP is also currently used in the BlueCore Serial Protocol for communication between Bluetooth modules and host computers