hp2114 basic

On 28 Mar 2005 at 13:43, Tim Riker wrote: I've had a look at Jeff's page and a quick look at the software. There are two parts to the BASIC system: the interpreter itself, and a "preparer" that configures the interpreter for the specific hardware on which it will run. You run the preparer, which reads the unconfigured interpreter in via paper tape, configures it, and punches a new tape that is ready to run on the specified hardware setup. Thereafter, you just load the prepared tape and run it. Source files 1-9 assemble into the preparer, and 10-17 into the interpreter. After assembly, the preparer is loaded (e.g., on SIMH), the I/O slot number of the teletype is entered into the S register ("deposit S 11" for SIMH), and the program is started at location 2 ("run 2"). It will print "PHOTO READER I/O ADDRESS?" and a whole bunch of other configuration questions. You can verify this by using the pre-assembled "prepare.abs" and "hpbasic.abs" files on Jeff's page. If the above doesn't work using the files you assembled, then I'd suspect an assembly problem or transcription error in the source files. Note that the interpreter doesn't use the MUX device (SIMH's 12920A implementation), but only the 12531C TTY device. It supports four terminals via four TTY cards. However, SIMH supports only one of each device, so you'll only be able to use a single TTY. Finally, and not to chase you away from here :-), but there's a SIMH users' mailing list, where questions such as the issue of SIMH using 100% of the CPU time have been discussed in some detail. Subscription instructions are available via the "Help with SIMH" link from the main SIMH Web page. -- Dave