Editing Atari 1400XL (section)

== What it was ==

* '''FREDDIE''' - the new custom memory controller, replacing the discrete TTL of the 600XL and
  800XL. It allowed ANTIC to fetch display data from memory separate from the CPU's 64 KB, so
  that screen memory no longer had to come out of the program's space.<ref name="museum1400" />
* '''Votrax SC-01 speech synthesiser''', with operating-system changes adding a '''V: handler'''
  for voice. A bundled cartridge, the '''1400XL Telecommunicator''', used the speech chip to
  announce terminal settings such as baud rate, line feed and wrap.<ref name="museum1400" />
* '''Built-in 300-baud modem''', Bell 103 compatible.<ref name="museum1400" />
* The 1200XL case and keyboard, with the XL function keys.<ref name="museum1400" />

Early 1400XL boards are marked 1400. Atari later moved to a combined '''1400/1450''' motherboard
carrying a power connector and a PBI daughter-card connector, so that the same board could serve
both machines - which is why some surviving "1400XL" units are found with 1450XLD boards and no
disk-controller daughter card.<ref name="museum1400" /><ref name="museum1450">[http://atarimuseum.ctrl-alt-rees.com/computers/8bits/xl/1450xld/1450xld.html "The Atari 1450XLD Computer Systems"], Atari Museum (Curt Vendel). Secondary source, but it hosts Atari's own 1450XL product specification, engineering notes, the "Barbara" and "Carmen" gate-array documents, the TONG test plan and both sets of schematics.</ref>