Change to next.

.swap:
	a = current slot
	c = try slot
	e = current slot

.loadInTheSP:
	a = current (old) slot
	hl = slot sp base + current slot * 2
	c = try slot
	de = old sp
	ix = old sp

.setupVars:
	a = current (old) slot
	hl = new SP
	bc = try
	de = new SP
	ix = old SP


a	try (new) slot number

hl	stack list base + (try +1) * 2

bc	new rambase value

d	0
e	try + 1) * 2

ix	SP

iy