Hi, I have just made a simulator for Intel 8008 in SIMH. This is a "just for fun" project that started when I found our old master thesis report from 1976 describing how we developed a computer using the Intel 8008 CPU.
I started to develop some code for 8008 based on the ALTAIR code. Later I found simulator code for 8008 in Intel-Systems/common/i8008.c but that code would not compile and was also missing i/o simulation so I continued to develop my own code and eventually got it working. To test the simulator I used the SCELBAL interpreter written in 8008 assembler (http://www.willegal.net/scelbi/scelbal.html). As the AS8 8008 assembler that was used to assemble this code does not seem to be available any longer, I modified the SCELBAL assembler source code to be assembled with the Macro Assembler AS (http://john.ccac.rwth-aachen.de:8000/as/). I added some i/o routines to the SCELBAL assembler code that uses the ports on the hardware for the computer we developed in our master thesis. My simulator development is done on a Lubuntu 64 bit Linux system so I have not tested the code on Windows etc. Do you think it is worth putting this code (i8008_cpu.c, i8008_defs.h, i8008_io.c, i8008_sys.c and some lines added to makefile) on the simh GitHub? If the answer to the previous question is yes, do you have any ideas about where the 8008 code should be placed in the simh source tree? (And what is the best procedure to add a new simulator?) A small example of running the SCELBAL interpreter (from the SCELBAL book, chapter 14): hal@LinuxServer:~/retro/simh/i8008/SCELBAL$ ../../simh-master/BIN/i8008 Intel 8008 simulator V4.0-0 Beta git commit id: ba447399 sim> load sc-asl.bin 12006 Bytes loaded. sim> g 0 READY SCR READY 10 PRINT 'RADIUS'; 15 INPUT R 16 K = 1.6 20 R2 = R^2 21 PRINT 'AREA =';3.14159*R2,'CIRCUM =';3.14159*2*R 22 PRINT 23 PRINT 25 K1 = K*R 30 FOR X = -R TO R + 0.1 40 Y = K*SQR(R2 - X^2) 50 PRINT TAB(2.5 + K1 - Y);'*';TAB(5.5 + K1 + Y);'*' 60 NEXT X 70 END RUN RADIUS?6 AREA = 113.0973 CIRCUM = 37.69910 * * * * * * * * * * * * * * * * * * * * * * * * * * READY Best regards Hans-Åke Lund _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
