7188 FAQ ascii text file
PART (A) for 7188 utilities
PART (B) For programming 7188

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*                PART (A) for 7188 utilities                        *  
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P.S. The default operation is :
     (1)Run 7188.exe on PC(on pure DOS or DOS-BOX of Win9x/WinNT)
     (2)Connect COM1 or COM2 of PC to I-7188's COM4
     (3)The baudrate and data format of RS-232 is set to 57600,N,8,1

[10/07/1999]
Q1. How to download new ROM-DISK(ROM-DISK.IMG) to 7188 ?
A1:
   method 1: Use torom.exe
    (0)change to the directory that the ROM-DISK.img is in it.
    (1)run 7188.exe on PC, and connect RS-232 to COM4 of 7188
    (2)run torom.exe on 7188
    (3)press ALT_R
  method 2: Use INIT* pin connect to GND
    (0)change to the directory that the ROM-DISK.img is in it.
    (1)run 7188.exe on PC, and connect RS-232 to COM4 of 7188
    (2)POWER OFF 7188 & connect INIT* pin to GND, then power ON 7188
    (3)After the 3 lines message is shown, just press ALT_M

 PS.ROM-DISK.IMG is the image file of the ROM-DISK.
    the size of ROM-DISK.IMG must 
    (1)less then 192K bytes for download to 7188(/D)/DOS( flash ROM is 256K), 
    or (2)less then 448K bytes for download to 7188(/D)/DOS/512(Flash is 512K)
    If the size of image file is too large, and user download it to 7188,
    maybe the 7188 cannot boot correct. This time, user must make a smaller
    ROM-DISK.IMG file, and use INIT* method to download it.(But if original
    user use INIT* method to download ROM-DIS.IMG, the ROM-DOS will be 
    over-wirte and 7188 will cnnot find the ROM-DOS, must use EEPROM programmer
    to burn the ROM-DOS code to the Flash ROM.(If the BIOS date is 12/30/98
    or before))(BIOS date is 10/05/99 or latter has fixed this problem)

[10/08/1999]
Q2. How to download the second ROM-DISK ?
A2:(1)User must use romdisk.exe to make the image file.
   (2)Use "torom.exe /n" to download the image file.
      for 256K type n can be: 'd' or 'e'
          torom /d --> download the image file to segment 0xD000
          torom /e --> download the image file to segment 0xE000
      for 512K type n can be: '9','a','b','c','d','e'
          torom /9 --> download the image file to segment 0x9000
  P.S. when use two romdisk, the second ROM-DISK will be drive B:,
       if use ramdisk, the ramdisk will be drive C:
       the utility LD3.EXE default download file to drive B:
       so, must use "ld3 /c" to download file to drive C:  


[10/20/1999]
Q3. How to download a program to the RAM-DISK(DISK B:)?
A3. Method 1:
    (1)change directory to where contain the file want to be download.
    (2)run 7188.exe
    (3)enter command "ld3"+CR
    (4)enter the filename
    (5)press ALT_S
    (6)enter the filename again
    (7)wait the download process complete.

    Method 2:
    (1)change directory to where contain the file want to be download.
    (2)run 7188.exe
    (3)Press F2
    (4)enter the filename
    (5)Press F9 & wait the download process complete.
    (if press F8 will download the file and run the file.)

Q4. If there are two ROM-DISK, and the ram-disk is DIS C:,
    how to download a file to the RAM-DISK(DISK C:)?
A4. Use A3 method 1, but on step(3) use command "ld3 /c".


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*                PART (B) For programming 7188                   * 
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[10/07/1999]
Q1. How to send a BREAK sognal from COM1/2 of 7188?

    #define LCR 3
    int data;
    int port=0x200;   // 0x200 for COM1, 0x100 for COM2
    data=inp(port+LCR); 
    outp(port+LCR,data|0x40); //set the Break control bit
    /*
     here must delay longer than RS-232 send one byte
     the time is depend on the baudrate of RS-232
     for example when set 9600,N,8,1
     one byte data contains 1 start+8 data+1 stop=10 bits
     need 1/960 sec. = 1.04ms  so user can use Delay(2)
     to delay 2 ms.( or use Delay(1); + Delay_1(1); to delay 1.1ms)
    */
    Delay(25); // delay 25ms
               
    outp(port+LCR,data & (~0x40));  // reset the Break control bit 

Q2. How to detect a BREAK signal?

   #define LSR
   int port=0x200;  //0x200 for COM1, 0x100 for COM2
   int data;

   data=inp(port+LSR);
   if(data & 0x10){
      printf("Receive BREAK\n");
   }
   
   and when COM1/2 receive a BREAK signal, COM1/2 will receive 
   one byte data, that data=0.
   that is whem receive a BREAK signal,
   IsCom1() or IsCom(1) will return 1,
   and ReadCom1() or ReadCom(1) will return 0.