hp2114 basic

[Tim Riker]

Steve Robertson wrote:
> Files with the "ABS" extension are compiled files. I don't have the ABS
> documentation in front of me but the format is not very complex. You can
> download the cross compiler at:
> http://oscar.taurus.com/~jeff/2100/emulator/hpasm.c (saves files in ABS
> format) and figure out exactly what the format is.

Thanx, I posted later on that I used the perl assember here:

http://www.brouhaha.com/~eric/software/asm21/

and got it assembled. The C version above did not work well for me.

> 
> The real trick is getting the file loaded into the HP1000. Depending on
> which I/O cards and loader ROMS you have, you can load the data either
> serially or in parallel.

actually I'm using simh at this point. loading the "tape" was no problem 
at all.

Now I'm stumped on getting it bootstrapped. Not sure where to put the 
tty port number info. Does it just want a slot number? looks like simh 
defaults to tty in slot 11, but I don't understand what the code is 
looking for:

PTSBS CLC 0        TURN OFF ALL DEVICES
       LIA 1        LOAD I/O ADDRESS OF TTY
       AND .63      MASK TO LOWER 6-BITS
       STA B        PUT ADDRESS IN B-REGISTER
       ARS,ARS      SHIFT TO BITS (5-3)
       ARS
       SZA          I/O ADDRESS >7?
       JMP ZGO      YES-INITIALIZE PREPARE BASIC TTY
*
       HLT 55B      INVALID I/O ADDRESS HALT
       JMP PTSBS    TRY AGAIN

more info on the wiki page:

http://rikers.org/wiki/FirstComputer

-- 
Tim Riker - http://rikers.org/ - TimR at Debian.org
Linux Technologist - Tim at TI.com - http://www.TI.com/
BZFlag maintainer - http://BZFlag.org/ - for fun!