AcornElectronMainboard

Changelog

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18:f1d60a768fbd
2022-07-05 Paul Boddie changeset files shortlog graph Added decoupling capacitors for RAM chips and tidied the layout somewhat.
RAM.sch
17:daebb474911d
2022-04-03 Paul Boddie changeset files shortlog graph Moved the modified 4164 back into the DRAM library, also moving TM4164EA4.
AcornElectron.lib DRAM.lib RAM.sch
16:8c68efc3a951
2022-04-03 Paul Boddie changeset files shortlog graph Added alternative TM4164EA4 RAM module. Changed RAM outputs to tri-state.
AcornElectron.lib AcornElectronMainboard.sch RAM.sch
15:75a233ccc2c5
2022-02-27 Paul Boddie changeset files shortlog graph Removed keyswitch symbol, now present in the keyboard project instead.
AcornElectron.lib
14:4a63b04afff9
2022-02-26 Paul Boddie changeset files shortlog graph Moved the keyboard matrix circuit into a separate project.
AcornElectronMainboard.sch CPU_ROM_KBD.sch KBD.sch RAM.sch UHF.sch cassette.sch clocks.sch expansion.sch sound.sch video.sch
13:9b07289bbfbc
2022-02-26 Paul Boddie changeset files shortlog graph Added component numbering for the keyboard matrix.
KBD.sch
12:aec8f8ba49a9
2022-02-26 Paul Boddie changeset files shortlog graph Added a sheet with the keyboard matrix circuit.
AcornElectron.lib AcornElectronMainboard.sch CPU_ROM_KBD.sch KBD.sch RAM.sch UHF.sch cassette.sch clocks.sch expansion.sch sound.sch ...
11:aa42a38b72f0
2022-02-24 Paul Boddie changeset files shortlog graph Added capacitor properties, various NTSC elements plus workarounds.
AcornElectronMainboard.sch CPU_ROM_KBD.sch UHF.sch cassette.sch sound.sch
10:07e94f9433be
2022-02-12 Paul Boddie changeset files shortlog graph Added diode for electrical rules check compliance.
CPU_ROM_KBD.sch expansion.sch
9:bb29b264d9b9
2022-02-12 Paul Boddie changeset files shortlog graph Changed the NMI signal buffering to match the circuit diagram, on the advice of the "Acorn Information - Volume 1" document, even though it is still a bit odd.
CPU_ROM_KBD.sch
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