mitsubishi - Al Kossow's Bitsavers

MITSUBISHI MICROCOMPUTERSPC9100IS-BIT CPU SOFTWARE DEVELOPMENT SYSTEMFUNCTIONThe PC9100 adopts multi bus as a system and mounts aPCAS601 CPU board, PCAS602 64K RAM board,PCAS603 floppy disk controller board (includingM5LSOS5A) of PCA S600 series and an I/O board forPC9100. 4 multi bus compatible boards are in the card cageslot for easy system's expansion and exclusive.2 built-in double-sided double-density floppy disks areprovided. The second drive (Drive B:) can select eitherdouble-sided single-density or single-sided single-density bythe switch on the rear panel. After selecting either singledensity, the CP/M lets the BIOS work automatically byaccessing each Drive as C:, D:.The EPROM programmer consists of 2 DI L sockets for2S-pin and 2 EPROMs are programmed in a 16-bitmicrocomputer object. Programmable EPROMs areM5L2716K, M5L2732K, M5L2732A type and M5L2764K.I/O functions are: (1) CRT interface (RS232C standard,Serial operation, 25-pin connector) (2) Printer interface(TTL level, Centronics 36-pin champ connector) (3)PC9110 interface (RS232C standard, Serial operation,25-pin connector) (4) General purpose serial interface (RS232C standard, Assignation to RDR: PUN: In CP/M, 25-pinconnector)After turning on the PC9100, the M5LSOS6S on thePCAS601 will be a bus master and executes a monitorprogram written in the ROM on the PCAS601. After this, ifthe G(GO) command is executed, the system will be inCP/M-S6 or CP/M-SO mode. When it is the CP/M-S6 mode,the system works considering the M5LSOS6S as master, andcommands consist of the CP/M-86, SOS6 assembler, SOS6debugger and application software for CP/M-S6 which is onthe market are able to execute.When it is the CP/M-SO mode, the commands consist ofthe CP/M-SO, SOSO assembler, SOSOdebugger and applicationsoftware for the CP/M-SO which is on the market areable to execute.The operation from the OS to the monitor is executedby the reset switch.BLOCK DIAGRAMI SERIALLTI BUS I CPU PORTM5L8086S M5L8251AP'r:TERRUPT'0'l11 PARALLELONTROLLER PORTM5L8259AP M5L8255AP-5PCA8601IINTERFACE FOR CRTCENTRONICSPRINTER INTERFACEaEX PANSIONCA RD CAGE(4)III REFRESH I 64KCONT-ROLLERPCA8602MEMORYBYTES (WITHPARITY BIT)M5K4116PM5W:7~~.02P I '--~I CPU IDENSITY NO.1M5L8085AP-jIDMA CONTROLLER MEMORY IM5L8257P-51 EPROM, SRAMSERIAL PORTM5L8251APx 21/0 BOARD FOR PC9100PCA8603PARALLEL IPORTM5L8255APXlc::::::::J c:=:J DC/DCCONVER-ROM H ROM L TERSOCKET SOCKET etcFDDPROM PROGRAMMER MODULE-------FDD DOUBLE-SIDED DOUBLE-DRIVEJDOUBLE- SIDED DOUBLE IDENSITY NO.2BIISELECTION SWITCHOF FLOPPY DISK TYPEPC9110 INTERFACEGENERAL PURPOSESERIAL INTERFACE• MITSUBISHI.... ELECTRIC7-11