'Brass' sounds will probably be CS-80(although he also used a Prophet 10), however if you mean the string sounds usually assocaited with the Bladerunner score ( and similar period pieces, like Antarctica), they were from the Roland's VP-330 (along with choirs sounds).
The earlier work China predates the introduction of the VP-330, and does
display many CS-80 string sounds.
The VP-330 is something I would like to see as a new plug-in (how about it Arturia?), as it really has a distinctive sound (due, in no short measure, to the version of the Dimension-D chorus circuit it sported).