Epson LQ 1050 - B/W Dot-matrix Printer - Page 197

REV.-A
Table A-8. GA E05A15HA Control Functions
Address
READAIVRITE
Control Functions
OOH
READ
None
WRITE
Data is set to the mode register.
Bit 7: –
Bit 6: Bank 1
Bit 5: Bank O
Bit 4: Carriage motor rotation
1 . . . Counterclockwise (L ~ R)
O . . Clockwise (R + L)
Bit 3: Carriage motor phase switching
1 . . . Direct control
O . . . Automatic control
Bit 2: Paper feed motor rotation
1 . . . Clockwise (Reverse)
O . . . Counterclockwise (Forward)
Bit 1: Paper feed motor phase switching
1 . . . Direct control
O . . . Automatic control
Bit O: Automatic half-dot protection
1 . . . Enable
2 . . . Disable
OIH
READ
Read data from PO-P4.
Bit 7-5: Not used
Bit 4: P4
Bit 3: P3
Bit 2: P2
Bit 1:
P1
Bit O: PO
WRITE Write data to P5.
Write P5 data to the mode register bit 5.
02H
READ
Clear 1st printhead data buffer.
WRITE Clear printhead data
9th bit
+ Head Data” bit 7
03H
READ
Clear 2nd printhead data buffer.
WRITE
Set
printhead data.
1st-8th bit
-+ Head Data bits 7-O
04H
READ Read paper feed motor phases.
Bit 7-4: Not used
Bit 3:
A-phase
Bit 2:
C-phase
Bit 1:
B-phase
Bit O:
D-phase
WRITE
Set paper feed motor phases
Bit 7-7: Not used
Bit
3:
A-phase
Bit 2:
C-phase
Bit 1:
B-phase
Bit O:
D-phase
A-1 1