Support/peripheral/other chips starting from 17

INS1771-1	Floppy disk formatter/controller
Comment:	Replacement for FD1771-1
Package:	40-pin DIP
Manufacturers:	National Semiconductor
National Semiconductor	INS1771D-1, INS1771N-1
SAB1791	Floppy disk formatter/controller
Comment:	Supports single density and double density drives. Inverted data bus. Single sided operation.
Package:	40-pin DIP
Manufacturers:	Siemens
Siemens	SAB1791-02-P
SAB1793	Floppy disk formatter/controller
Comment:	Supports single density and double density drives. Single sided operation.
Package:	40-pin DIP
Manufacturers:	Siemens
Siemens	SAB1793-02-P
SAB1795	Floppy disk formatter/controller
Comment:	Supports single density and double density drives. Inverted data bus. Double sided operation.
Package:	40-pin DIP
Manufacturers:	Siemens
Siemens	SAB1795-02-P
SAB1797	Floppy disk formatter/controller
Comment:	Supports single density and double density drives. Double sided operation.
Package:	40-pin DIP
Manufacturers:	Siemens
Siemens	SAB1797-02-P