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| boards:ecb:protoboard_iii:errata [2021/11/27 13:58] – Revision from 2021-11-27 | boards:ecb:protoboard_iii:errata [2026/06/15 12:50] (current) – external edit 127.0.0.1 | ||
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| + | /* Imported from Wayback Machine | ||
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| + | */ | ||
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| + | ====== Errata ====== | ||
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| + | //Version 1606// | ||
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| + | This board fixes the I/O select problem on former boards, which did not qualify /IORQ with /M1 high. This extra qualification prevents the board from selecting on an INTA (Interrupt Acknowledge) cycle. | ||
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| + | There was/is a Kicad issue where signals exiting a global bus did not connect to traces of the same name on the same sheet. | ||
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| + | The schematic is correct but A7..A2 leaving the bus are not connected to A7..A2 on K1..K6. | ||
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| + | The following changes are required - six link wires need to be added. | ||
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| + | A7: connect U5.2 to U2.3 | ||
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| + | A6: connect U5.4 to U2.5 | ||
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| + | A5: connect U5.6 to U2.7 | ||
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| + | A4: connect U5.8 to U2.9 | ||
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| + | A3: connect U5.11 to U2.12 | ||
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| + | A2: connect U5.13 to U2.14 | ||
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| + | This is is corrected in the 171005 version. | ||
