Buffer And Data Flow; Buffer - Epson L-1000 Technical Manual

REV.-A

2.2.10 Buffer and Data Flow

This section describes the buffer and data fiow.

2.2.10.1 Buffer

There are 5 kinds of buffers: input, line, image, queue, and download. The structure of each buffer is described
as follows:
Input Buffer
Figure 2-58 shows the input buffer structure. This buffer is a lK-byte or 8K-byte ring buffer, where data and
commands from the host computer are stored. Data and commands are input by the INIT signal or by the INTSR
interruption signal generated from the CPU.
Line Buffer
Figure 2-59 shows the line buffer. Flags indicate the character type and enhancements, and the data up to
the printing command (data for one line) is edited.
LQ-500/L-1000
Figure 2-58. Input Buffer Structure
Figure 2-59. Line Buffer Structure
PRINCIPLES OF OPERATION
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