Jay asked about benchmarks for SIMH running HP2000 Access, Here's a quick chain test for doing 255 (+-) chains with timing for my SIMH configuration as described (about 23 sec.) I would hope that real hardware would out perform it. If not I'll have to think about what could be wrong with the simulator and come up with another test. Let me know what you get, Jay, next time you have her up. Thanks again, Mike. list CHATST 10 COM A$[255] 20 IF LEN(A$)=255 THEN 70 30 IF LEN(A$)#0 THEN 50 40 PRINT TIM(0),TIM(4) 50 A$[LEN(A$)+1]="A" 60 CHAIN X,"chatst" 70 PRINT TIM(0),TIM(4) 80 END run CHATST 39 22 39 45 DONE cat NAME LENGTH RECORD NAME LENGTH RECORD NAME LENGTH RECORD BTEST 1 CATT AL 5 63 CHATST C 1 DT 1 FPTS9 2 HI 1 KLFW 1 PR0 AL PR0 64 ROS00 AL 7 63 SIGNIN 1 SUM 1 WORLD 1