Thread: Mk14 vdu
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Old 7th Nov 2020, 10:20 am   #824
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,587
Default Re: Mk14 vdu

Just additional loading, there is an ongoing thread concerning the memory expansion but it is basically just a 6116 and one logic IC which decodes chip enable from the upper address lines. 1.6K of the total 2K bytes of RAM are used and of course _WR and _OE of the SRAM are also connected to _NWDS and _NRDS.

I'll try to reproduce Tim's results but as my build of the memory expansion is not easily removable I think I will go higher with the capacitor values rather than lower.
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