GE 235 System Manual page 61

P r i n t e r C o n t r o l l n s t r u c t i o n s
A
single P r i n t instruction will cause printing of up to 120 characters on one line from a block
of 40 words of BCD data in memory, When the PRINT instruction i s given, the printer receives
information directly from the main memory through the appropriate numbered controller selector
priority channel.
Printer operations a r e time shared with other processing. The printer can be interrogated for
"ready" status (completion of previous PRINT instructions) by the BCS instructions.
The WPL, WFL, SLW, and SLT commands must be preceded by the SEL P instruction, which
selects the specific controller selector channel. These instructions cannot be modified.
Printer Control Instructions
Mnemonic Operand Index Time
Oper. Code Address Word Microsec.
SLT
SLW N
36 SLEW PAPER TO TAPE PUNCH. The printer paper
is spaced until a hole i s detected in the vertical
format tape in channel K.
36 SLEW PAPER N LINES. The printer paper i s spaced
N (0 to 63) number of times.
WFL Y 36 WRITE FORMAT LINE. One line of BCD information
WPL X N i s printed under automatic format control. Y i s the
starting location in memory of a s e r i e s of format
control words. Instruction should always be followed
by a WPL instruction to specify the location (X) of
the f i r s t word of information to be printed and whether
the information is alphanumeric o r numeric (N).
WPL
N 36 WRITE PRINT LINE. Print one line of BCD infor-
mation (I to 120 characters long), starting a t memory
location Y. The N indicates that information i s
numeric only (if N is blank, information i s alpha-
numeric). Printer paper i s automatically spaced one
line.
P r i n t e r
Test
a n d B r a n c h l n s t r u c t i o n s
The following branch instructions test whether a particular printer controller condition is true
o r false. If the condition tested i s true, the computer executes the next sequential instruction.
If false, the computer skips the next instruction and executes the second sequential instruction.
P stands for printer controller connected to controller selector channel P; thus referred
to
a s
printer controller P.
VI- 5