Attached is a dump of the ROM. Some of the more interesting snippets are below.
..FACOM 6681PC Copyright Fujitsu Limited 1987
COPYRIGHT (C) FUJITSU LTD. 1988 WRITTEN BY T.ITOH
MG86-V2.0 DEBUGGER SYSTEM READY....>..?....? RESOURCE FULL....? CATALOGUE FULL....? CATALOGUE DOUBLE..N. SEG:OFF 0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF N. SEG:OFF 0 2 4 6 8 A C E N. SEG:OFF 0 4 8 C ..ERROR @....PORT..AX=..BX=..CX=..DX=..BP=..SI=..DI=..ES=..DS=..IP=..CS=..FL=..SP=..SS=..AL=..AH=..BL=..BH=..CL=..CH=..DL=..DH=..OF=..DF=..IF=..TF=..SF=..ZF=..AF=..PF=..CF=.. .....ø...INTTERRUPT POINTER CRASHED...ABORT?(Y/N)...!.Copyright (C) 1988 FUJITSU LTD.........
.0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F.ÿÿ:,-><+ .........AXCXDXBXSPBPSIDIALCLDLBLAHCHDHBHESCSSSDSBX+SI.BX+DI.BP+SI.BP+DI.SI....DI....BP....BX....AL,DX.DX,AL.AX,DX.DX,AX...................; \.; IMM = . '. PTR .TBYTE.DWORD.>(D(C(S(=(QWORD.[SI].[SI],ES:.ES:[DI],.[DI].,1.,CL.AX,.AL,.,AX.,AL.IN JA JB JC JE JG JL JO JP JS JZ OR AAA AAD AAM AAS ADC ADD AND CBW CLC CLD CLI CMC CMP CS: CWD DAA DAS DEC DIV DS: ES: ESC HLT INC INT JAE JBE JGE JLE JMP JNA JNB JNC JNE JNG JNL JNO JNP JNS JNZ JPE JPO LDS LEA LES MOV MUL NEG NOP NOT OUT POP RCL RCR REP RET ROL ROR SAL SAR SBB SHL SHR SS: STC STD STI SUB XOR CALL IDIV IMUL INTO IRET JCXZ JMPF JMPS JNAE JNBE JNGE JNLE LAHF LOCK LOOP POPF PUSH REPE REPZ RETF SAHF TEST WAIT XCHG XLAT CALLF CMPSB CMPSW LODSB LODSW LOOPE LOOPZ MOVSB MOVSW PUSHF REPNE REPNZ SCASB SCASW STOSB STOSW LOOPNELOOPNZ?? FWAIT
The code also includes some credits hidden in amongst some empty space:
.*** Project Maneger ***.. S.Simakage ..*** Hardware Design ***.. Y.Gotoh..*** CRUX Firmware Development Team ***.. Chief Programmer : N.Komatsu .. Programmer : N.Satou.. Programmer : K.Sakuma.. Programmer : I.Takabe.. Programmer : Y.Arai..*** Firmware Development Support Team ***.. Architect : K.Hirai.. MG86 Porting : T.Itoh.. CMT Programming : H.Makari..*** CRUX Manual Support ***.. M.Nozawa..*** THANKS FOR ***.. C.M.Brown.. E.D.Agee.. N.Takahashi.. T.Yamazaki.. Y.Shiratori.. H.Sakuma
Any ideas? None of this is familiar to me.