(7-6) Connection from ARP (IC806) to 64020(8-4) 1914 Vsync
ROM data ? ARP (IC806) ? Decrypt (IC811) ? AV DecoderCPU measures the 1914 Vsync interrupt cycle.
(IC203)
Error 41: Vsync interruption is not detected
Error 04: Data read error42: Vsync interrupt cycle error
05: Write/read data mismatch error
06: DMA transfer DREQ errorThe number of interruption for 200 msec is counted, and if it is 11
07: DMA transfer address errorto 13 times, this check is OK. It should be 12 times exactly, but ?1
10: Chip-to-chip data transfer errorerrors are allowable.
AC-3 audio data stored in ROM (IC803) are written to the (8-5) Still Picture Output (SDRAM (IC201,202) direct write)ARP
(IC806), then whether they are transferred to the AV Decoder
(IC203) is checked. If transfer error is not detected, the adPattern da? ta AV Decoder (IC203) dress of? Video Out
AV Decoder (IC203) to which data are transferred is displayed on
the terminal.Error 31: AV Decoder (IC203) interruption (DMA transfer) is
A part of data transferred to the AV Decoder (IC203) is read intonot detected
Syscon RAM (IC802) through DMA, and compared with ROM
(IC803) data.The pattern is directly written to the SDRAM (IC201, 202) in AV
Decoder (IC203), then its picture display is checked.
(7-7) Interrupt Line in 64020First, the brightness signal data are written by the amount of one
screen while changing every pixel.
AV Decoder DRAM (IC201, 202) ? (DMA COPY) AV DecoderFor the color difference signals, both Cr and Cb are set to 80h for
DRAM (IC201, 202) another areamonochromic pictures, and the display is turned on.
Then, color difference signal data are written while changing the
Error 31: AV Decoder interruption is not detecteddata every column.
As both brightness signal data and color difference signal data
Data transfer stop interruption which is generated throughtake regular patterns, the processing speed is increased through
DMA copy of DRAM (IC201, 202) data in AV Decoder (IC203)DMA transfer of the repeated sections.
to another area is detected.Further, in detail check the color difference signal data written to
the out of display area are copied through DAM transfer to change
(8) Video Consumption Concerneddisplay colors successively.
If no error is found, the message is displayed to prompt for key
(8-2) 1914 (Serial)entry.
Check the pattern output.
Color bar output (color bar enable command) from Video Encoder
(IC252)(8-6) Still Picture Output (via ARP (IC806))
Error 11: Serial transfer errorROM picture data ? ARP (IC806) ? AV Decoder (IC203) ?
Video Out
Using the Vsync interruption, serial communication to the Video
Encoder (IC252) starts, and the color bar enable command is trans-Error 10: Chip-to-chip data transfer error
ferred to the 1914.
The Vsync interruption and internal serial 1 interROM (IC803) data arruption are used.e transferred to the AV Decoder (IC203) via
If no error is found, the message is displayed to prompt for kARP (IC806), and the displayeyed picture is checked.
entry.If no error is found, the message is displayed to prompt for key
Check the color bar output.entry.
The output picture is same as the start-up picture.
(8-3) 1914 Read
(8-7) DNR (Serial) (IC251)
ID read ? Existing data matching check
ROM picture data ? ARP (IC806) ? AV Decoder (IC203) ?
Error 40: 1914 ID errorDNR (IC251) ? Video Out (outline)
The 1914 device ID is read.Error 10: Chip-to-chip data transfer error
Error if the read value is not O1914 (hex)�.
Using special diagnostic command, the output still picture is trans-
ferred to the DNR (IC251) for checking.
If no error is found, the message is displayed to prompt for key
entry.
This checking is made only for the players with DNR.
The output picture used is same as that in (8-6) Still Picture Out-
put.
The colors will vary extremely, if DNR (IC251) is effective.
For the players without DNR (IC251), the error code 0 is returned.
6-5 |
ACEC
