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Diffstat (limited to 'decoders/mcs48/__init__.py')
| -rw-r--r-- | decoders/mcs48/__init__.py | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/decoders/mcs48/__init__.py b/decoders/mcs48/__init__.py new file mode 100644 index 0000000..424c6b4 --- /dev/null +++ b/decoders/mcs48/__init__.py @@ -0,0 +1,31 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2018 fenugrec <fenugrec@users.sourceforge.net> +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; either version 2 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, see <http://www.gnu.org/licenses/>. +## + +''' +This protocol decoder de-multiplexes Intel MCS-48 (8039, 8048, etc.) external +program memory accesses. This requires 14 channels: 8 for D0-D7 (data and +lower 8 bits of address), 4 for A8-A11 (output on port P2), ALE and PSEN. +An optional A12 is supported, which may be an arbitrary I/O pin driven by +software (use case is dumping ROM of an HP 3478A). + +The two groups D0-D7 and A8-A12 must be on consecutive channels, for +example CH8..CH15 and CH0..CH4. +''' + +from .pd import Decoder |