Support/peripheral/other chips starting from 27

SAB2793B	Advanced floppy disk formatter/controller
Comment:	Supports single and double density drives. Software compatible with SAB179x. Single sided operation.
Package:	40-pin DIP
Manufacturers:	Siemens
Siemens	SAB2793B-P
SAB2797B	Advanced floppy disk formatter/controller
Comment:	Supports single and double density drives. Software compatible with SAB179x. Double sided operation.
Package:	40-pin DIP
Manufacturers:	Siemens
Siemens	SAB2797B-P