Fw v1.2 EPROM type: STMicroelectronics M27C512-10F1 (DIP28, in socket)
Fw v1.2 EPROM labels: "COPYRIGHT VISCOUNT INTERNATIONAL", "030999", "5105", "18P186--1"

MCU: ST90R50C6-H (84-pin PLCC, in socket)
SRAM: BS62LV256P x2 (in socket)
Backup battery: CR2032-T (soldered)
FDD controller: NEC D72064LM (in socket)
Power supply: 10.5VAC, 1.2A