「NASA、宇宙探査機ボイジャーのメンテナンスのためFortran/アセンブリ言語を扱えるプログラマーを募集中」記事へのコメント

アセンブリの技術者募集って

[Anonymous Coward]

ハードべったりだから、どのプロセッサで経験積んだかも指定しないとダメなんじゃないだろうか。
RCAのCD4000シリーズ [wikipedia.org]というものらしいけど。

使ったことある人いる？

Re:

[goji (949)]

4000シリーズはC-MOSの標準ロジックICだよ。
プロセッサはCDP1802 COSMACのほう。

Re:

[Anonymous Coward]

レスを付けるときは、含まれるリンクぐらい読んでからにしてほしい。

It has been erroneously reported on the Internet
that the Voyager space probes were controlled by a version of the
RCA 1802 (RCA CDP1802 "COSMAC" microprocessor)

さらに、 RCA 1802のWikipedia [wikipedia.org]でも

The 1802 has often been incorrectly claimed
to have been used in the earlier Viking and Voyager spacecraft,
  but it was not available at the time those spacecraft were being designed,
  and primary sources describe the Viking and Voyager computers
  as having architectures very dissimilar to the 1802,
  and not being microprocessor-based.

というわけで、ボイジャーにRCA 1802が使われているというのは、都市伝説。

Voyagers were not based on a microprocessor but on a specially designed set of RCA CD4000 [wikipedia.org]

Re:アセンブリの技術者募集って

[Anonymous Coward]

標準ロジックを組み合わせてスクラッチから作った、
独自アーキテクチャのコンピュータということか。

Voyager FAQ
http://voyager.jpl.nasa.gov/faq.html [nasa.gov]

Question: What kind of computers are used on the Voyager spacecraft?

Answer: There are three different computer types on the Voyager spacecraft and there are two of each kind. Total number of words among the six computers is about 32K.

Computer Command System (CCS) - 18-bit word, interrupt type processors (2) with 4096 words each of plated wire, non-volatile memory.

Flight Data System (FDS) - 16-bit word machine (2) with modular memories and 8198 words each

Attitude and Articulation Control System (AACS) - 18-bit word machines (2) with 4096 words each.

(以下略)