JPS55121585A - Dot printer control system - Google Patents

Dot printer control system

Info

Publication number
JPS55121585A
JPS55121585A JP2843679A JP2843679A JPS55121585A JP S55121585 A JPS55121585 A JP S55121585A JP 2843679 A JP2843679 A JP 2843679A JP 2843679 A JP2843679 A JP 2843679A JP S55121585 A JPS55121585 A JP S55121585A
Authority
JP
Japan
Prior art keywords
print
control part
microprogram
dma
function
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2843679A
Other languages
Japanese (ja)
Inventor
Noboru Takizawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2843679A priority Critical patent/JPS55121585A/en
Publication of JPS55121585A publication Critical patent/JPS55121585A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dot-Matrix Printers And Others (AREA)

Abstract

PURPOSE: To realize easily control over two-way print of a dot printer controlled by a microprogram, by providing the microprogram with a character generator and then by transferring dot pattern data to a print control part via DMA.
CONSTITUTION: Synchronizing with a timing signal, DMA (direct memory access) control part 1'-3 operates to attain access to the address of a character to be printed in character generator 1-2' stored in microprogram control patt 1' and then transfers dot pattern data to print control part 2'. Then, DMA control part 1'W3, having the increment function and decrement function to memory addresses, attains access by the increment function for forward print or the decrement function for backward print. Therefore, two-way print can easily be controlled.
COPYRIGHT: (C)1980,JPO&Japio
JP2843679A 1979-03-12 1979-03-12 Dot printer control system Pending JPS55121585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2843679A JPS55121585A (en) 1979-03-12 1979-03-12 Dot printer control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2843679A JPS55121585A (en) 1979-03-12 1979-03-12 Dot printer control system

Publications (1)

Publication Number Publication Date
JPS55121585A true JPS55121585A (en) 1980-09-18

Family

ID=12248610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2843679A Pending JPS55121585A (en) 1979-03-12 1979-03-12 Dot printer control system

Country Status (1)

Country Link
JP (1) JPS55121585A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883737A (en) * 1972-02-08 1973-11-08
JPS53120429A (en) * 1977-03-29 1978-10-20 Hitachi Ltd Printing apparatus of dot type

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883737A (en) * 1972-02-08 1973-11-08
JPS53120429A (en) * 1977-03-29 1978-10-20 Hitachi Ltd Printing apparatus of dot type

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