3.5DiskOnChipAddress Setting

The DiskOnChipTM function allows the system to boot or operate without a FDD or a HDD. DiskOnChipTM modules may be formatted as drive C or A. With DiskOnChipTM, user may also execute DOS commands such as FORMAT, SYS, COPY, XCOPY, DISCOPY and DISKCOMP etc.

The U9 location onboard the HS-3000/4M is the DiskOnChip module socket. Jumper JP11 assigns the address setting of the installed module. Setting the 8 pins of JP11 allows you to select the starting memory address of the DiskOnChipTM (D.O.C.). If you have additional memory devices in the system, please set both at different memory address mapping to avoid the mapping area conflicts.

JP11: DiskOnChipAddress Select

JP11

Address

 

 

Short 1-2 (default)

D000

2

8

Short 3-4

D800

1

7

Short 5-6

E000

 

 

Short 7-8

E800

 

 

3.6Watchdog Timer

There are three access cycles of watchdog timer as Enable, Refresh and Disable. The Enable cycle should proceed by READ PORT 443H. The Disable cycle should proceed by READ PORT 043H. A continue Enable cycle after a first Enable cycle means Refresh.

Once if the Enable cycle activity, a Refresh cycle is request before the time-out period for restart counting the WDT Timer’s period. Otherwise, it will assume that the program operation is abnormal when the time counting over the period preset of WDT Timer. A System Reset signal to start again or a NMI cycle to the CPU comes if over.

The JP9 is using for select the active function of watchdog timer in disable the watchdog timer, or presetting the watchdog timer activity at the reset trigger, or presetting the watchdog timer activity at the NMI trigger.

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