JPH0246202U - - Google Patents
Info
- Publication number
- JPH0246202U JPH0246202U JP1988122199U JP12219988U JPH0246202U JP H0246202 U JPH0246202 U JP H0246202U JP 1988122199 U JP1988122199 U JP 1988122199U JP 12219988 U JP12219988 U JP 12219988U JP H0246202 U JPH0246202 U JP H0246202U
- Authority
- JP
- Japan
- Prior art keywords
- program
- programmable rom
- storage area
- data
- stored
- 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
Links
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 1
Landscapes
- Storage Device Security (AREA)
- Programmable Controllers (AREA)
Description
第１図は本考案の一実施例を示し、暗号入力の
概念を示す模式図、第２図は本考案の一実施例に
かかるＰＲＯＭライタの入力キーを示す模式図、
第３図ＡおよびＢは本考案の一実施例にかかる暗
号入力処理の際の表示例を示す模式図、第４図Ａ
およびＢは本考案の一実施例にかかるプログラム
読出し処理の際の表示例を示す模式図、第５図は
本考案の一実施例を示す暗号入力処理およびプロ
グラム入力処理のフローチヤート、第６図は本考
案の一実施例を示すプログラム読出し処理のフロ
ーチヤート、第７図はＰＲＯＭライタおよびＲＯ
Ｍカセツトを含むＰＣシステムの構成を示す斜視
図である。
１…ＲＯＭカセツト、２…ＰＲＯＭライタ、２
Ａ…表示部、２Ｂ…キー、３…プログラム入力装
置、３Ａ…表示部、３Ｂ…キー、５…ＰＣ本体。
FIG. 1 shows an embodiment of the present invention, and is a schematic diagram showing the concept of cryptographic input; FIG. 2 is a schematic diagram showing the input keys of a PROM writer according to an embodiment of the present invention;
FIGS. 3A and 3B are schematic diagrams showing display examples during cryptographic input processing according to an embodiment of the present invention, and FIG. 4A
and B are schematic diagrams showing display examples during program read processing according to an embodiment of the present invention, FIG. 5 is a flowchart of code input processing and program input processing according to an embodiment of the present invention, and FIG. 7 is a flowchart of a program reading process showing an embodiment of the present invention, and FIG.
1 is a perspective view showing the configuration of a PC system including an M cassette. 1...ROM cassette, 2...PROM writer, 2
A...Display section, 2B...Key, 3...Program input device, 3A...Display section, 3B...Key, 5...PC main body.
Claims (1)
び暗号データを記憶する暗号記憶領域を有するプ
ログラマブルＲＯＭと、 該プログラマブルＲＯＭの前記プログラム記憶
領域および前記暗号記憶領域に、それぞれプログ
ラムおよび該プログラムに対応した暗号データを
書込むことが可能なＰＲＯＭライタと、 前記プログラマブルＲＯＭに記憶されたプログ
ラムを読み出すための暗号データを入力する暗号
入力手段と、 該暗号入力手段が入力した暗号データと、前記
プロブラマブルＲＯＭに記憶された暗号データと
が一致したときのみ、当該記憶された暗号データ
に対応して記憶されたプログラムを読出すプログ
ラム読み出し手段と を具えたことを特徴とするプログラマブルコン
トローラ。[Claims for Utility Model Registration] A programmable ROM having a program storage area for storing a program and an encrypted storage area for storing encrypted data, and a program and the program in the program storage area and the encrypted storage area of the programmable ROM, respectively. a PROM writer capable of writing encrypted data corresponding to the programmable ROM; a cipher input means for inputting cipher data for reading a program stored in the programmable ROM; a cipher data inputted by the cipher input means; A programmable controller comprising: program reading means for reading a program stored in correspondence with the stored coded data only when the coded data stored in the programmable ROM matches the coded data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988122199U JPH0246202U (en) | 1988-09-20 | 1988-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988122199U JPH0246202U (en) | 1988-09-20 | 1988-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0246202U true JPH0246202U (en) | 1990-03-29 |
Family
ID=31369904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988122199U Pending JPH0246202U (en) | 1988-09-20 | 1988-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246202U (en) |
-
1988
- 1988-09-20 JP JP1988122199U patent/JPH0246202U/ja active Pending