COVOX
ZXNet echo conference «hardware.zx»
Hi, ALL!
I propose the "COVOXa" scheme with decoupling via AY channels. D0-D7
are connected to the CENTRONICS printer port. P-L connect
directly to the peripheral connector circuits. COVOX port - 221, Scorpio.
270k +5v
CENTRONICS ┌>+5v 0.1 ┌───███──────────>
│ ├─┤├───┤
D0 ┌─────┐ │ █330k ┌────────────> P
<────┬11┤ ├1──┤ █ /
│ ├13─┤ * ├───█ KT315 b,d
To port │ │ ├14─┘ 0.1 18k │ \n
printer │ ├15─────┬──┤├──███──┤ └>┬──┤ to channels
│ │ ├2──┐ │ │ ┌>┘ AY
│ ├3──┤ █ │ /
<────┴─4┤ ├12─┤ █ 4.7k ├───█
D7 └─────┘ │ │ ─┴─ \n
KR572PA1 ├───┘ ─┬─ └────────────> L
│ │ 200
─┴─ ─┴─
─═ Sergey ═─