NEO-253: Difference between revisions
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Select signals come from {{Chipname|NEO-F0}} SLOTA and SLOTB. | Select signals come from {{Chipname|NEO-F0}} SLOTA and SLOTB. | ||
Todo: 10 and 42 are GND | |||
==SLOT4F @ 5E== | ==SLOT4F @ 5E== | ||
Revision as of 16:21, 16 August 2016
Quintuple 74HC253 4-to-1 multiplexers with common select lines, making 10 switches in one chip.
Only (?) used on second revision 4-slot MVS systems. Not to be confused with the more common NEO-273.
Pinout
OpenOffice Draw file: File:Neo-253.odg
Select signals come from NEO-F0 SLOTA and SLOTB.
Todo: 10 and 42 are GND
SLOT4F @ 5E
- Mux 10~3: SDD7~SDD0
- Mux 2: PWAIT1
- Mux 1: PWAIT0
- Outputs go to CN9