See ftp://sunsite.unc.edu/pub/academic/computer-science/history/pdp-8/os8/os8.v3d/sources/system/dectapes/dectape7/pip10.pa for PIP10, and table 33 inhttp://www.grc.com/pdp-8/docs/OS8_System_Reference_Manual.pdf <http://www.grc.com/pdp-8/docs/OS8_System_Reference_Manual.pdf>for the DCB breakdown. I'm not an OS8 expert, but I think the DCB is setup by CONFIG.
Relevant snippets: DCB=7760 /DEVICE CONTROL BLOCK (FIELD 1) DVTYPE, 0 /DEVICE TYPE HOLDER JMS GTDVTP /COMPARE DCB ENTRY WITH TC08 OR TD8E SZA CLA JMP CDIN3 /NOT DECTAPE GTDVTP, 0 TAD (DCB-1 DCA TEMP1 CDF 10 TAD I TEMP1 /GET DCB ENTRY CDF DCA DVTYPE TAD DVTYPE AND (770 TAD (-210 SZA TAD (30 JMP I GTDVTP This communication may not represent my employer's views, if any, on the matters discussed. On 20-Mar-13 18:05, Bob Supnik wrote:
I tried running PIP10 from the image Ian was using.If the simulator is configured for a TC08, it hangs. It is in a loop doing IOT 773/JMP .-1, which is a TD8E IOT.If the simulator is configured for a TD8E, it returns an error. I tried DTA0:/Z and got OUTPUT FILE OPEN ERROR.So the first issue is that PIP10's logic for telling which DECtape controller is present uses some feature that the simulator is doing incorrectly.The second issue is what happens beyond that point. /Bob _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
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