HP-21MX bootstrapping?

Replying to Terry who uses the a pass-through paper tape emulator and a qbasic app to bootstrap. Copying the list... Thanx for the comments. :) Does the QBasic app do anything more than just copy the bytes? Ie: is the PIC expecting a new format? The method I use at the moment is that I have a 12531 set to 2400 baud in slot 11. I'm also using this as a console once I have hp basic or similar running. I'm running Linux so then I run stty thusly: # stty -F /dev/ttyUSB0 0:0:800000fb:0:0:0:0:0:0:0:1:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0 which sets raw, clearing everything else and setting 2400 8n2 I set S to 001100, preset, ibl, run and the I use: http://rikers.org/hp2100/abscopy.c which shows some useful (useless?) information on stderr and dumps char by char to stdout with a usleep() in between to get around the lack of flow control. Thusly: $ ./abscopy < basic1.abs > /dev/ttyUSB0 and everything loads up fine. The paper tape bootloader does not expect to talk to a 12531, but works as the 12531 inits to a state where it'll read the bytes. ie: the software interface looks the same. The downside of this is that I need to change the port setup in order to talk to basic as it does not expect 8n2. I may well look into using the BACI and the 264x loader, but I don't (yet?) have a rom for that, and I expect it will require 2 serial ports. Not a big deal I suppose. :) -- Tim Riker - http://Rikers.org/ - TimR at Debian.org Embedded Linux Technologist - http://eLinux.org/ BZFlag maintainer - http://BZFlag.org/ - for fun!