Memory Selection Jumpers Jp3 - Jp10 - Axiom CMD11E1 User Manual

Memory Selection Jumpers JP3 – JP10
The factory setting for the jumpers should be correct for the memory devices that came with your
board. If you add or modify the type or size of memory, you must change the following jumpers
accordingly. All jumpers are two-pin jumpers and are installed vertically.
U7 - ROM or EEPROM
FFFF
U7
OFF
OFF
E000
OFF
ON
U6 - RAM or EEPROM or ROM
DFFF
U6
OFF
OFF
8000
OFF
ON
U5 - RAM
7FFF
For 32K device
U5
0100
For 8K device
You can determine the size of memory devices by reading the label on top of the chip. Memory
devices that contain 64 in the part number are usually 8K. Those with 256 are usually 32K.
The type of memory can also be determined by reading the chip label. If you don't recognize the
memory type you can look up the part number in a catalog or device manual. If the chip is by
Atmel™ or XICOR™ it is probably an EEPROM. If it has HY or SEC it is probably RAM.
JP8 JP9
OFF
OFF
ON
OFF
JP10 write protects U7 memory device when OFF.
JP4 JP5
OFF
OFF
ON
OFF
JP6 write protects U6 memory device when OFF.
JP3 = ON
hex (minus register area, see memory map) and
recommended position for Buffalo Monitor and Small C
operation. No segmentation occurs.
JP3 = OFF
mirrored at 2000 – 3FFF, 4000 – 5FFF, and 6000 - 7FFF.
This position will allow CPU internal Ram and I/O ports to
segment the 8K address space. Use this position to run
Basic11 with an 8K device.
JP10 U7 DEVICE
ON 8k EEPROM
OFF 8k EPROM.
OFF 32k EPROM.
ON 32k EEPROM.
JP7 JP6
OFF ON
OFF OFF
ON OFF
ON ON
32K bytes from 200 hex to 7FFF
<DEFAULT>
8K bytes from 0000 hex to 1FFF hex and
11
< DEFAULT >
U6 DEVICE
8k RAM or EEPROM.
8k EPROM.
32k EPROM.
32k RAM or EEPROM.
< DEFAULT >