%  Short branch (only altering low part of PC), possibly conditionally
%  #1   The branch condition to use

inhibit_i
inhibit_i
inhibit_i
inhibit_i


% Move PC to J register
ld_j         sel_pc
             sel_pc

% J register now points to low part of
% jump address. Move address to INC register and
% read low jump address into PC_LO

sel_j_pc     ld_inc       sel_mem     ld_lo_pc
sel_j_pc                  sel_mem


% Now INC holds the address of the instruction
% following the jump, I.e. the address that
% should go into PC if jump is *not* to be done.
% Otherwise, if jump is OK, PC already contains
% the destination address. So what we need here
% is a conditional load of PC from INC
             sel_inc    #1
ld_c_pc      sel_inc    #1
             sel_inc    #1


0
reset inhibit_i