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SR bit 26705 turns ON when the PC is ready to transmit to the Host Link Unit.
SR bit 26713 turns ON when the PC is ready to transmit to the Host Link.
3-4-20 Peripheral Port Communications Areas
Peripheral Port Error Code SR bits 26408 to 26411 are set when there is a peripheral port error in the Gener-
al I/O Mode.
Error code Error type Error conditions Valid modes
0 No error --- All modes
1 Parity error When data received differs from
positive/negative parity setting.
All modes
2 Framing error When step bit cannot be detected. All modes
3 Overrun error When data is not properly received. All modes
4 Timeout error When a timeout occurs for two PCs linked
one-to-one.
1:1 PC Link slave or 1:1
PC Link master
SR bit 26412 turns ON when there is a peripheral port communication error (ef-
fective in General I/O Mode).
SR bit 26413 turns ON when the PC is ready to transmit data in General I/O
Mode.
SR bit 26414 turns ON when the PC has completed reading data from a periph-
eral device. Effective in General I/O Mode.
SR bit 26415 turns ON when data overflow occurs following the reception of
data. Effective in General I/O Mode.
SR 26600 to SR 26615 contains the number of peripheral port receptions in
General I/O Mode (BCD).
SR bit 26705 turns ON when the PC is ready to transmit to the Host Link Unit.
SR bit 26713 turns ON when the PC is ready to receive data from the Host Link.
3-4-21 Memory Cassette Areas
Memory Cassette Contents SR 26900 to SR 26907 indicate the type of memory used for the Memory Cas-
sette.
Memory Type Code
Nothing 00
UM 01
IOM 02
HIS 03
Memory Cassette Capacity SR 26908 to SR 26910 indicate the memory capacity of the Memory Cassette.
Capacity Code
0 KW (no board mounted) 0
4 KW/8 KW 2
16 KW 3
32 KW 4
SR bit 26914 turns ON when EEPROM Memory Cassette is protected or
EPROM Memory Cassette is mounted.
Host Link Level 0 Send
Ready Flag
Host Link Level 1 Send
Ready Flag
Peripheral Port
Communication Error Bit
Peripheral Port Send Ready
Flag
Peripheral Port Reception
Completed Flag
Peripheral Port Reception
Overflow Flag
Peripheral Reception
Counter
Host Link Level 0 Send
Ready Flag
Host Link Level 1 Receive
Ready Flag
EEPROM/EPROM Memory
Cassette Mounted Flag
SR (Special Relay) Area Section 3-4