This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. ---1931936098-1684937599-986272650=:2685 Content-Type: TEXT/PLAIN; charset=US-ASCII Andy is having a bad computer day. He's asked me to forward his (definitive) explanation of 2's complement arithmetic. ---1931936098-1684937599-986272650=:2685 Content-Type: TEXT/PLAIN; charset=US-ASCII; name="andy.txt" Content-Transfer-Encoding: BASE64 Content-ID: Content-Description: Content-Disposition: attachment; filename="andy.txt" RnJvbTogICAgICAgICAgIAlBbmRyZXcgV2FycmVuIDxmYXN0ZndkQGl4Lm5l dGNvbS5jb20+DQ0KVG86ICAgICAgICAgICAgIAlwaWMgbWljcm9jb250cm9s bGVyIGRpc2N1c3Npb24gbGlzdCA8UElDTElTVEBNSVRWTUEuTUlULkVEVT4N DQpTdWJqZWN0OiAgICAgICAgCVJlOiAyLUNvbXBsaW1lbnQgQWRkaXRpb24v U3VidHJhY3Rpb24uICBRdWVzdGlvbnMNDQpEYXRlIHNlbnQ6ICAgICAgCU1v biwgMiBBcHIgMjAwMSAyMDozMzo0OCAtMDcwMA0NCg0NCkphbWVzIExlZSBX aWxsaWFtcyA8UElDTElTVEBNSVRWTUEuTUlULkVEVT4gd3JvdGU6DQ0KDQ0K PiBJIGZpbmFsbHkgZHVnIG91dCBteSBkaWdpdGFsIHN5c3RlbXMgYm9vayBm cm9tIHdheSBiYWNrIGluIGNvbGxlZGdlLA0NCj4gdG8gZmluZCBvdXQgbW9y ZSBhYm91dCBob3cgdHdvJ3MgY29tcGxpbWVudCBhZGRpdGlvbiBpcyB1c2Vk IGluIHRoZQ0NCj4gUElDIG1pY3JvIGNvbnRyb2xsZXIuICBOb3cgSSBoYXZl 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