===== PIO-6834-2/4M-1 - Memory expansion board =====

PIO-6834-2/4M-1 is a 2MB or 4MB I/O slot memory expansion board manufactured and sold from 1990 by I.O Data for X68000 which have or have been expanded to 2MB.

|{{:x68000:pio-6834_1a.jpg?250|}}  |{{:x68000:pio-6834_3.jpg?250|}}  |
|  PIO-6834-2/4M-1 (2MB)  |  PIO-6834-2/4M-1 (4MB)  |

{{:x68000:pio-6834_2.jpg?300 |}}

The main memory needs to be configured as one continuous block and you can configure the board to start addressing main memory from the following locations:

|  MB  |  1  |  2  |  3  |  4  |
|  2M  |  OFF  |  OFF  |  OFF  |  OFF  |
|  4M  |  ON  |  OFF  |  OFF  |  OFF  |
|  6M  |  OFF  |  ON  |  OFF  |  OFF  |
|  8M  |  OFF  |  OFF  |  ON  |  OFF  |
|  10M  |  OFF  |  OFF  |  OFF  |  ON  |

The default settings are 2MB