6 Feb
2003
6 Feb
'03
12:10 p.m.
Avoided the OT but the shuttle (earlier one?) also used a
modified Grid laptop.
http://www.nasm.si.edu/nasm/dsh/artifacts/GC-
PayloadComputer.htm
Lawrence
On 3 Feb 2003, , Eric Smith wrote:
lgwalker@ mts.net
I think they
are on-topic. We've got four Ibm 360's
onboard.
No, they have five AP-101S General Purpose Computers on
board. The AP-101S and the earlier AP-101B are derived from
the computer used in the F-15 fighter. The architecture
actually quite a bit different from that of the System/360,
though there are similarities. The System/360 had sixteen
32-bit general registers, while the AP-101 has two separate
sets of eight registers. The System/360 could address
sixteen megabytes, but the AP-101 can only address one
megabyte, and it is awkward to address more than 256 Kbytes.
But the AP-101B is over ten years old, and I think *some* of
the AP-101S computers are, so they're on-topic.
Space Shuttle issues other than the computers are off-topic.
Does anyone have the manuals for HAL/S, the language used
for the AP-101 software? There's some info on it at:
http://www.hq.nasa.gov/office/pao/History/computers/Appe
ndix-II.html