GLUE-FREE GLITCH SCHEME
ZXNet echo conference «code.zx»
From Kirill Frolov → To All 3 November 1998
Greetings, All!
This is, IMHO, the most glitch-free scheme for connecting a watch to a glitch.
Or rather, there is one signal decoder to which DALLAS is connected,
port #eff7 - video modes and #cff7 - configuration.
___ __
Signals AS, R/W and DS are Dallas legs 14,15 and 17.
A3>───────┐
│┌─┐
___ ┌─┐ └┤1│ ┌─┐
DOS>──┤1o───┤ o───┤1o──┐
┌┤ │ └─┘ ┌┤ │ │
│└─┘ │└─┘ │
__ ─┴─ ─┴─ │ ┌─┐
WR>───────────────────│───┬─┤1o──>AS
┌───────────────┘ ┌─│─┤ │
│ ID7 │ │ └─┘
│ ┌──┬────┐ │ │ ┌─┐ ___
______ └─oE1│DC 6o───────┘ ├─┤1├──>R/W
IORQCE>──oE0│ │ ┌──│─┤ │
A15>─────┤E2│ 5o──────┤ │ └─┘
│ │ │ │ │ ┌─┐ ______
├──┤ 3o──┐ │ ├─┤1├──>wrEFF7
A14>─────┤X0│ │ └───│──│─┤ │
A13>─────┤X1│ 1o─┐ │ │ └─┘
A12>─────┤X2│ │ │ │ │ ┌─┐ ______
│ │ │ │ │ └─┤1├──>wrCFF7
└──┴────┘ └────│────┤ │
│ └─┘
│ ┌─┐ __
__ └────┤1├──>DS
RD>─────────────────────────┤ │
└─┘- - - - - - - - - - - - - - -
| --- GLUKS FREE --- |
| REKOMENDOWANO K PRIMENENIU |
- - - - - - - - - - - - - - -
__ __
Glitch-free operation is achieved by using RD and WR signals at the final stage
decryption, which makes the circuit not critical to delays in preliminary
decryption stages (within reasonable limits).
Used radioelements: 555LL1, 1533LE1, 1533ID7, PENTIUM (any, you can
broken).
All small logic should be soldered according to the diagram, and drilled into the Pentium
hole (or hole) and use it as a keychain.
P.S. I forgot to add - the clock is not prohibited by bit 7 #eff7. Because it is
Sax and Masdai.
With best wishes, Kirill Frolov.