CIEL Mini Slot Expander
This page was last modified 02:13, 29 October 2016 by Gdx. Based on work by Tvalenca and Mars2000you and others.

Contents

Description

This compact slot expander made and sold by Ademir Carchano (Brasil), was very popular in Brazil and several units has sold in Europe.

Original product name is "Mini-Expansor de slot". A revision 2 has been released in 2013.

Gallery

Carchano's Mini Slot Expander Ciel revision 1
Carchano's Mini Slot Expander Ciel revision 2

Specifications

Some options are available. Below desciption is for the revision 1. See pictures gallery for the revision 2.

Caution: Cartridges can be inserted upside down! This causes damage to the cartridge and perhaps also to the MSX and slot expander.

About jumpers

JP1 and JP2 position depend of used chips.
AB = One IC 74LS133
BC = Two IC 74LS30

JP3 is set to ON (default) when 5V is provided from the MSX, OFF when provided from an external power supply.

JP4 and JP5 are used to connect an SCC in parallel with a Megaram. JP4 places the slot 1 in parallel with the 0, and JP5 the slot 3 with the 2.

About switches

  • CH1 enables or not the signal /SLTSL of connector CN2
  • CH2 enables or not the signal /SLTSL of connector CN3
  • CH3 enables or not the signal /SLTSL of connector CN4
  • CH4 enables or not the signal /SLTSL of connector CN5

The LED stays lit when corresponding slot is disabled.

(source msxpro)