1、7e52d7f0db36cf501db9245cabe979eLa7e53a24288c487dcc1b1bc2d3601e5fLa7e53b6732f293645df0eafdb68f5786La7e5484f91065a3e3c81edffe3cec358La7e54853e618343bdc661d131fc7d3d2La7e55df44da3ce36375855c3826341adLa7e563a7d538834db5d27a07bc9a67c5La7e568581daf2800202d4a267b0461a7愶La7e568fe0dd183ce2490c2cfe4c2a30fLa7e
2、56b893b0f06b6456f494e656d8151La7e574f8c2d25bdabb4067a7c6c4bdf5La7e57523d92e822567402e2739ed44feLa7e5854057f33b2116c82b0b91e6436f崶La7e588412ca9e3321f5723da08280130丶La7e59657429557912778ad3d37d38a65La7e5a0e3a89dfbd38d7e5e204790cab9脶La7e5a27b46bcf63596e4f59b2107536aLa7e5a703691c487ad2d4c0586209b438La7e
3、5aafd53ff45dacbaddc0f04da355f缶La7e5b1c2496b3e046bc9e0aac7911349砶La7e5b95336bea6facbade4d1cd21c549紶La7e5bfd8a097c1cc62dc89c2f1e19f82La7e5c35c92788814d167d77be8065afdLa7e5c423286ec89c1f488ce1815fd7e2La7e5c9e5910aa3aa5ad457d5480b2bbaLa7e5cb1bb55de4c93131d655c3f7d5fdLa7e5d4ac967ac43a31ec17edf9d69827萶La7
4、e5d5b94b23fe493b458f10992a1584La7e5d7c917585caf37aec9e336968472萶La7e5d89bebd3853440d5fd8d071e85cdLa7e5d9a260681cb1a073784ae24e7e63La7e5e05860d8d51281844789f3580bc0La7e5e365343d7460c2379487fc9e232aLa7e5e9eff6d57dcd3a1efa5732160f3eLa7e5fb27e513685b3896da05a030e9c6La7e602c7c9eb91500bf886e577dd1e09La7e6
5、02dde45a6eaa83fe749f2588b69e鰶La7e605e7bb8b857c10657f9b7328c38bLa7e60e4684bd0de77aefa835ad7cfa5fLa7e6323d8b8c5c31a843c81e744a38a2La7e6323d8b8c5c31a843c81e744a38a2La7e633ecc6a2d02e80589d7a65d4d02aLa7e63637deb2bc2fef9c160ef9153549La7e6395e1c08c72d215da3b0fadb901eLa7e63c499b1af1e4daf9c2db0650c5f5La7e640
6、be9ad2a8e3ea61bedf79ccbdd7La7e644fba921f88fe6333b35ed12c025La7e6463fa221f12e0b6bf3eacc6cd310La7e6467a1a11ae012d60700e12d8cd08La7e6468019a2c8cd52372834462dd1ceLa7e6468019a2c8cd52372834462dd1ce渶La7e6475f98ed2d79cd4cbc7c00a7315fLa7e64ec076473b8b0b471d44f93f82f2La7e6194e33e3527c1e3c11a4734b881bLa7e62cc6
7、eedf470999e585afb4e23196La7e60fbbe9bdfce05e886bd028346e10La7e54c13b6efa2f4c38466f6b8b6a06dLa7e5765b6c779e3b9399c70aac9bf7ddLa7e62536fb80f0f2e2f1ec401322b583La7e6052fe7f2cbc030816090aa84f0b5La7e554af115b09a4fe001373464f55e5瀶La7e5334c9af01cccd9b8d90f0aa2d8fa收La7e646d32151beef6396e48e6ecbf3f4La7e61e351
8、a815807f675190b49141745蔶La7e5c65c8525f0f3c3525d7ffe8b4bca猶La7e53f04260a728ee59036ca0112b13eLa7e5befa0e82e2a9dd9b4ddd81a9b702眶La7e5c3b58a2ca9194d7e64a4d47d8911La7e5b5c06ff7d366d55ce270cef18cddLa7e53154725581336e75d470e6595831La7e6308ea18b07075b2d7dd0d346b432La7e5d6d23151272b4db8912c636abd60La7e58eea7
9、d433ce8a0c00750b876f870La7e5c1187aa08b3cc19e4fe55fa652ab縶La7e623c6a9cda464efbac06d57f8221f蠶La7e594d9ae81565659f6a98b3b3cbd88戶La7e54e8aa9c7c02c846d13a8ccfd1b02伶La7e5defdfcbc6cc717c6d0bab518b5f0La7e63feb37e22cf3700f839245a3c751砶La7e600400b28dc3ceb9c9fb850913005La7e627ac828e9be7ab8b589393c4d32dLa7e5973
10、8d29dea8fcaf4ca5143bf8594欶La7e64b5be6a25b1051b648561d3bc2e5La7e560207b321b0d04af975dd052fa76La7e61411d8aba4a354de8dcded71b2cb尶La7e60751c4591ee688bf07278f05667eLa7e5ec9f197824ede4c3d48c56565096La7e5cf399beac8ff955a25b69cdb2f36La7e641ea49e89aeb711d4310c916db8fLa7e5a1a42befe095641a9508efff0c3bLa7e618c3
11、0ab974396fb75c173d2938acLa7e58061222e02d5d1f30f8638f1eef8La7e54cdc84e891890d5f5eb4738d55eb嬶La7e5795625cc1190b99860cdac0be843儶刕La7e5d0cce503516def3982eba06b1c1c脶剚La7e623606f06897b2cc29390895551fd吪La7e58b2313ad355de35406599010f15b咝La7e5352b7e33f1f97312ce20ed432705entially modified a value in the accum
12、ulator which was periodically compared to a known value. Unexpected values were transmitted with register information. Logic This test performed a series of logic and math computations and provided three types of error identifications: 1) addition/subtraction, 2) logic and 3) multiplication/division
13、. All miscompares of computations and expected results were transmitted with other relevant register information. Memory This test loaded internal data memory at locations D:0x20 through D:0xff (or D:0x20 through D:0x080 for the CULPRiT DUT), indirectly, with an 0x55 pattern. Compares were performed
14、 continuously and miscompares were corrected while error information and register values were transmitted. Program Counter -The program counter was used to continuously fetch constants at various offsets in the code. Constants were compared with known values and miscompares were transmitted along wi
15、th relevant register information. Registers This test loaded each of four (0,1,2,3) banks of general-purpose registers with either 0xAA (for banks 0 and 2) or 0x55 (for banks 1 and 3). The pattern was alternated in order to test the Program Status Word (PSW) special function register, which controls
16、 general-purpose register bank selection. General-purpose register banks were then compared with their expected values. All miscompares were corrected and error information was transmitted. Special Function Registers (SFR) This test used learned static values of 12 out 21 available SFRs and then con
17、stantly compared the learned value with the current one. Miscompares were reloaded with learned value and error information was transmitted. Stack This test performed arithmetic by pushing and popping operands on the stack. Unexpected results were attributed to errors on the stack or to the stack po
18、inter itself and were transmitted with relevant register information.VII. TEST METHODOLOGY The DUT Computer booted by executing the instruction code located at address 0x0000. Initially, the device at this location was an EPROM previously loaded with Boot/Serial Loader code. This code initialized th
19、e DUT Computer and interface through a serial connection to the controlling computer, the Test Controller. The DUT Computer downloaded Test Code and put it into Program Code RAM (located on the Main Board of the DUT Computer). It then activated a circuit which simultaneously performed two functions:
20、 held the DUT reset line active for some time (10 ms); and, remapped the Test Code residing in the Program Code RAM to locate it to address 0x0000 (the EPROM will no longer be accessible in the DUT Computers memory space). Upon awaking from the reset, the DUT computer again booted by executing the instruction code at address 0x0000, except this time that code was not be the Boot/Serial Loader code but the Test Code. The Test Control Computer always retained the ability to force
