9060/9090 Parts Location Part Number Description 5A-5H 2114 (8) 1K x 4 bit Static RAM DOS: 7C 300516-002 * 2564 EPROM DOS 3.0 C000-DFFF (rev. B) 7D 300517-002 * 2564 EPROM DOS 3.0 E000-FFFF (rev. B) 7C 300516-001 + 2764 EPROM DOS 3.0 C000-DFFF (rev. B) 7D 300517-001 + 2764 EPROM DOS 3.0 E000-FFFF (rev. B) 7C 300516 * 2564 EPROM DOS 3.0 rev. C000-DFFF (rev. C) 7D 300517 * 2564 EPROM DOS 3.0 rev. E000-FFFF (rev. C) 7C 300516 + 2764 EPROM DOS 3.0 rev. C000-DFFF (rev. C) 7D 300517 + 2764 EPROM DOS 3.0 rev. E000-FFFF (rev. C) 7E 6502 CPU 7F, 7G 6532 (2) RIOT * 2564 are used on PCB 300012-001 + 2764 are used on PCB 230012-002 Controller: 4C 300515 2716 EPROM DOS 3.0 (rev. A) 4C 300515-001 2716 EPROM DOS 3.0 (rev. B) 4A 6502 CPU 4B 6522 VIA 4D 6810 128 x 8 bit Static RAM Winchester Controller: 9D Am2910 12 bit Bit/Slice Controller drive Tandon TM602S (9060) drive Tandon TM603S (9090)