 :
1.SYS_CS - 77h (byte) WITH TR-DOS ON
	D0 - RG0
	D1 - RG1
	D2 - RG2
	D3 - TURBO ( 1 - 7 MHz)
	D4 - TON
	D5 - TNAB
	D6 - AD/KEY (0 - IBM PC XT KEYBOARD, 1 - ADC)
        D7 - NMI reset (0 - active)
	A8 - PEN (0 - DISABLE PAGE (PROGRAMMING MODE),1 - ENABLE PAGE)
	A9 - DOS_ON (0 - SET TR-DOS ON & ENABLE PORTS SYS & PAGE)
	A14 - PEN2 (0 - ENABLE CS FOR DSK_RAM & PAL_CS,1 - DISABLE)

 Mode    RG2&RG1&RG0
Sinclear      3
640x200       2
320x200       0
Text          6


2.PAGE_CS - F7h (BYTE) WITH TR-DOS ON
PAGE RAM INPUTS :
	A0 - A14
	A1 - A15
	A2 - ROM2
        A4 - ???
PAGE RAM OUTPUS :
	D0 - RAM&ROM PAGE 0
        D1 - RAM&ROM PAGE 1
        D2 - RAM&ROM PAGE 2
        D3 - RAM&ROM PAGE 3
        D4 - RAM&ROM PAGE 4
        D5 - ROM (1 - ENABLE ROM)
        D6 - RAM (0 - ENABLE RAM)
        D7 - MX_A (0 - ENABLE PAGE_NUM (0-2) FROM S128 PAGE_PORT (7FFDH)

3.ADC/KEYBOARD DATA PORT - 7D7Dh
4.MISC CONTROL READ PORT - 7FFDh
        D7 - ADC/KEY READY (HIGH)
        D6 - HARD INT (HIGH)
        D5 - TELEPHONE LINE IS UP (HIGH)
        D4 - BELL ON TELEPHONE LINE (HIGH)
