simh-testsetgenerator/I650/sw/bell/00_readme.txt
Roberto Sancho Villa 08027162ca I650: Update IBM 650 simulator to Release 4
- Integration with updated sim_card API
- Addition of MT (Mag Tape) device
- Addition of DSK (Disk) device
- Build time simulator test
2020-05-15 05:57:01 -07:00

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Restoration comments May/2018
By Roberto Sancho
Floating Point Interpretive System (BELL interpreter)
From Bitsavers Manual 28-4024_FltDecIntrpSys.pdf
Do not uses the loader stated in manual.
Instead, I wrote a loader (SOAP source code is_sys_load_src.txt)
that allows reading the original listing from manual and generating
a 1-word per card load deck.
A new deck (deck 21) has been written to defined two new
O2 instructions (see is_set_loopbox.txt):
set loopbox O2=800
tr zero O2=453
These instructions allows a more general use of index
loopbox concept (see is_example_1_src.txt)
Floating point numbers are encoded as
2300000049 = 0.23
1000000050 = 1.0
1500000052 = 150.0