File psl-1983/20-kernel/io.ctl from the latest check-in
define DSK: DSK:, P20:, PI: S:DEC20-CROSS.EXE ASMOut "io"; in "io.build"; ASMEnd; quit; compile io.mac, dio.mac delete io.mac, dio.mac
define DSK: DSK:, P20:, PI: S:DEC20-CROSS.EXE ASMOut "io"; in "io.build"; ASMEnd; quit; compile io.mac, dio.mac delete io.mac, dio.mac