Exercise 5
Example 4 of [23] solves the equation
on [0,1] with history y(t) = (1)^{[ 5t ]} for t £ 0.
For s > 0, the function [s] is floor(s) in
MATLAB. The history has jump discontinuities prior to t = 0 that must be set in 'Jumps'. With a delay of 1,
only jumps that occur at t ³ 1 can have an effect in [0,1].
Reference
 [23]

D.R. Willé and C.T.H. Baker, DELSOL  a numerical code for
the solution of systems of delaydifferential equations, Appl.
Numer. Math., 9 (1992) 223234.