VCT 38xxA
ADVANCE INFORMATION
Note:
If not otherwise designated, all parameters in the following table are specified as single bytes. As write
parameter magazine numbers 8 and 0 have the same meaning, as read parameter the magazine number is a
true 4-bit number (e.g. magazine 8=00001000). For write parameters the values in parentheses indicate
default values after reset (in hex notation). For compatibility reasons every undefined bit in a write parame-
ter should be set to ‘0’. Undefined bits in a read parameter should be treated as “don’t care”.
Table 3–16: Command language
Code
Function
Write Parameter
Read Parameter
Notes
Operational & Test Commands
00
01
02
03
Dummy
Reset
no action
software reset of 65C02
escape to other codes
Escape
Version
CPU pointer high
CPU pointer low
show version in OSD layer
CPU pointer to text in ROM
04
05
06
Test
reserved for testing
reserved for testing
Test
DRAM Mode
dram mode
flash inc
control enable
(06)
(05)
(FF)
dram mode = I/O page register 028EH
flash freq = flash inc / (256 * 0.00324)
control enable:
bit0 = C4 erase page
bit1 = C5 news flash
bit2 = C6 subtitle
bit3 = C7 suppress header
bit4 = C8 update indicator
bit5 = C9 interrupted sequence
bit6 = C10 inhibit display
bit7 = C11 magazine parallel
07
Acquisition Mode
acquisition mode
init subcode high
init subcode low
gain max
(00)
(FF)
(FF)
(1F)
(1F)
gain
filter
acquisition mode:
bit0 = no slicer adaption
bit1 = no bit error in framing code
bit2 = limit slicer adaption
init subcode:
filter max
automatic subcode request after
page table reset
gain max:
filter max:
only used if bit2 = 1
only used if bit2 = 1
Memory Management Commands
14
Read DRAM Size
dram size high
dram size low
dram mode
dram size:
000CH =
3kByte SRAM
004CH = 19kByte SRAM
0200H = 128kByte SRAM
0240H = 144kByte SRAM
0400H = 256kByte SRAM
0800H = 512kByte SRAM
dram mode:
see I/O page register 028EH
25
27
Page Memory
dram bank
dram high
(00)
(40)
start of page memory
execute page table reset
Page Table Reset
reset page table
reset ghost row status
reset data service status
reset cycle count
reset memory count
reset ghost count
reset priorities
clear rolling header
clear VPS data
clear WSS data
70
Micronas
MICRONAS [ MICRONAS ]
