Mitsubishi
Two dumps of the Mitsubishi 800 PROM.
Mitsubishi Model #FM4021F03
Serial #80011682
FCC ID: C6F9JAFM4021F03
Battery Type: FZ-809A 9.6Vdc 1.7AH
EPROM 27C256 (labeled CB5) checksum $77D4
TC5564AFL-15 Toshiba 8Kx8 SRAM
BA6251F [16-pin SOIC] ROHM (?)
MC34118DW [28-pin SOIC] Motorola speakerphone circuit
SA575D Philips compandor
VF04C 8819JBY AK0111F [80-pin QFP] Mitsubishi
M60015-0121RP 842101 [100-pin QFP] Mitsubishi ASIC/Custom gate array
M50747FP 840102 [72-pin QFP] Mitsubishi microprocessor, RAM, ROM (740 series)
CSI93C46K [8-pin SOIC] 64Kx16 or 128x8 serial EEPROM --> labeled IC801 ESN
PROM DUMP of this phone.