Motorola CMD11E1 User Manual
Page 11
11
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
JP8
JP9
JP10
U7 DEVICE
OFF
OFF
ON
8k EEPROM
< DEFAULT >
OFF
OFF
OFF
8k EPROM.
OFF
ON
OFF
32k EPROM.
ON
OFF
ON
32k EEPROM.
JP10 write protects U7 memory device when OFF.
U6 - RAM or EEPROM or ROM
JP4
JP5
JP7
JP6
U6 DEVICE
OFF
OFF
OFF
ON
8k RAM or EEPROM.
OFF
OFF
OFF
OFF
8k EPROM.
OFF
ON
ON
OFF
32k EPROM.
ON
OFF
ON
ON
32k RAM or EEPROM.
< DEFAULT >
JP6 write protects U6 memory device when OFF.
U5 - RAM
For 32K device
JP3 = ON
<DEFAULT>
32K bytes from 200 hex to 7FFF
hex (minus register area, see memory map)
and
recommended position for Buffalo Monitor and Small C
operation. No segmentation occurs.
For 8K device
JP3 = OFF
8K bytes from 0000 hex to 1FFF hex and
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.
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.
U5
7FFF
0100
U6
DFFF
8000
U7
FFFF
E000