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Single Expansion
Eureka 4MB
Manufacturer
Pyramid / Omni-Eureka
Date
1992 / 1994
Amiga
A500
Interface
trapdoor slot, Gary socket
Chip and/or Fast RAM expansion
2 or 4 MB RAM
1992:
32 DIP sockets
takes 256k×4 DIPs in groups of 16
1994:
two 72 pin SIMM sockets
takes 1 or 2 MB SIMMs, sizes cannot be mixed
the main board connects to the trapdoor slot
an adaptor board connects to Gary's socket and is plugged into header JP1 on the main board
1 MB can be used either as Chip or Fast RAM, depending on the setup
disable switch
battery backed up clock
RAM Setups
Mode 1: FastRAM expansion only
no CPU board needed, no soldering required
jumper JP2 on expansion main board set to "FAST"
Mode 2: FastRAM and 512kB ChipRAM expansion
no CPU board needed, but soldering required
JP2 on the A500 mainboard has to be cut and a cable has to be soldered that connects the middle pad of that jumper with JP3 on the Gary adaptor board
jumper JP2 on expansion main board set to "CHIP"
Mode 3: FastRAM and 512kB ChipRAM expansion
optional CPU board required, no soldering needed
the CPU board plugs into 68000 socket, the CPU is replaced onto the board
supplied cable connects the headers JP1 on CPU board and JP2 on Gary adaptor board
jumper JP2 on expansion main board set to "CHIP"
Photos
front side
back side
Manual
Eureka4MB_de.pdf
Benutzerhandbuch
936 kB
Eureka4MB.pdf
User Manual
127 kB
Vintage Advert
Advert (DE)
1992-04