2.12.9 VDP VPS/Gemstar Data Register
Subaddress
80 0700h−80 070Ch
VPS: Read only
Subaddress
80 0700h
80 0701h
80 0702h
80 0703h
80 0704h
80 0705h
80 0706h
80 0707h
80 0708h
80 0709h
80 070Ah
80 070Bh
80 070Ch
7
6
5
4
VPS byte 1
VPS byte 2
VPS byte 3
VPS byte 4
VPS byte 5
VPS byte 6
VPS byte 7
VPS byte 8
VPS byte 9
VPS byte 10
VPS byte 11
VPS byte 12
VPS byte 13
3
2
1
0
These registers contain the entire VPS data line except the clock run-in code or the start code.
Gemstar: Read only
Subaddress
80 0700h
80 0701h
80 0702h
80 0703h
80 0704h
80 0705h
80 0706h
80 0707h
80 0708h
80 0709h
80 070Ah
80 070Bh
80 070Ch
7
6
5
4
3
2
1
0
Gemstar frame code
Gemstar byte 1
Gemstar byte 2
Gemstar byte 3
Gemstar byte 4
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
2.12.10 VDP FIFO Read Register
Subaddress
90 1904h
Read only
7
6
5
4
FIFO data [7:0]
3
2
1
0
FIFO data [7:0]: This register is provided to access VBI FIFO data through the host port. All forms of teletext data come
directly from the FIFO, while all other forms of VBI data can be programmed to come from registers or from the FIFO.
If the host port is to be used to read data from the FIFO, then bit 0 (host access enable) in the FIFO output control
register at subaddress C0h must be set to 1.
2−74
TI [ TEXAS INSTRUMENTS ]
