JPH0261899A - Prom writer - Google Patents

Abstract

PURPOSE:To confirm the type of a P-ROM in use at present anytime by always displaying the type of the P-ROM selected at present on a screen. CONSTITUTION:After a program is started up, a user definition file in which P-ROM data are collected is read in when a P-ROM writer cartridge 29 is packaged. Next, the ID of the P-ROM is read, and a coincident ID is found out by comparing a read ID with the ID in an area sequentially, and the P-ROM data equivalent to the ID is preserved. The data is displayed on the right upper corner of the screen of a display device 25, then, a command awaiting state is set. The display of the P-ROM data is always maintained on the right upper part of the screen at the time of inputting the next command by performing the display just before prompt display even when the data displayed at the last time disappears by scrolling. Therefore, it is possible to confirm the type the present P-ROM anytime.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data writing device for a programmable read-only memory (hereinafter referred to as a PROM writer), a hand belt computer, a laptop computer, The present invention relates to a removable PROM writer (hereinafter referred to as a PROM writer cartridge) as shown in 4 in FIG. 1 that can be installed in a desktop computer or the like.

[Prior Art] Conventionally, in a PROM writer, once the PROM type is selected before starting access to the PROM, the following 7i
While operating the PROM writer, the currently selected PR
It is not possible to confirm the type of OM. therefore,
To know the type of PROM selected by the PROM writer, the type was displayed using key operations.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technology, if a long time has passed since the PROM type was selected, or if another operation has been performed, it is difficult to determine which PROM was selected. Not only do you forget, but you also have to perform operations to confirm each time. SUMMARY OF THE INVENTION In order to eliminate such drawbacks, the present invention aims to provide an environment in which the currently selected PROM type can be known at any time.

[Means for Solving the Problems] The present invention provides a portable computer to which a PROM writer cartridge can be attached, including a control means for controlling the PROM writer, and a means for reading a file containing data used in the control means. and means for accessing the PROM using the data; and means for displaying the currently selected PROM type on the screen.

[Operation] In the present invention, the currently selected PR is displayed at the top right of the screen.
By always displaying the OM type, the user can always know the current PROM type.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. 1st
The figure is an external view of a hand belt computer according to an embodiment of the present invention, which includes a pace unit (1), a keyboard (2), a display section (3), and a cartridge-type PROM writer (4).

FIG. 2 is a block diagram showing the hardware configuration of the hand belt computer shown in FIG. 1. (21) is the CPU,
(22) is an internal storage device consisting of a RAM in which various data and programs are stored. (23) is a ROM storage device that stores various programs and functions as a disk; (24) is an external memory that stores various programs or data.

(29) Data can be read and written by installing a PROM into the LtP ROM writer cartridge's socket. (30) is its interface.

(27) is a keyboard, (28) is its interface, and (25) is a control device that controls the display device (26).

The PROM writing method used in this embodiment will be explained below.

FIG. 3 is a flowchart showing the procedure for writing data into PROM. First, the start address for writing data to the PROM is set (32), 1 volt is added to the power supply voltage Vcc supplied to the PROM, and v2 volts are added to the write voltage Vpp for data writing (33). Vl,
V2 is a value that differs depending on the PROM.

Next, initialize the retry counter X to 0 (34),
Apply an initial program pulse of Plmsec (35
). As a result, data is written to the above address. Increment the retry counter X (36) and if it does not exceed the maximum number of retries N
7) Read the data from the address you just wrote,
After comparing the data with the previously written data and confirming that they match (38), an additional program pulse of P2 msec is applied (39). Pl and P2 are values unique to each PROM.

In the above, if the data do not match (38), the writing is repeated until the writing can be performed correctly within the maximum number of retries N. If correct writing is not performed within N times, writing is stopped at that point (44).

The above operation is repeated until the final address (40). Finally, the data of all the addresses written above is verified to confirm that all the data is correct (42), and the writing is completed (43).

As can be seen from the above explanation, Vl, V2゜PL in the figure,
P2. By simply changing N for each PROM, all PROMs adopting the writing method shown in FIG. 3 can be handled.

FIG. 4 shows the structure of the data area used by the PROM writer control procedure of this embodiment. This area consists of a ``regular data area J (52)'' in which data that this control procedure has from the beginning is stored, and a ``user-defined data area J (52) to which the user can add data at program startup or during program execution. (
53).

Konoelianiha, above (7) Vl, V2. P.L.
, P2°N are stored in units of 32 bytes. "Regulated data area" (5
2) consists of n pieces of data from PROMI data (46) to PROMn data (49), and this data cannot be changed or deleted by the user. On the other hand, "User-defined data area J (53) is
This is an area where the user can arbitrarily register PROM data that is not registered in (52). The combined size of the data area is fixed, and the user can add data within this area.

As already described, the data for one PROM is composed of 32 bytes, and FIG. 5 explains the composition. As shown in the figure, in descending order of address: rPROMPROM size), rPROM name J (55), rPROM IDJ (56).
), “Write voltage Vpp” (57) “Power supply voltage VCC
J (58), "Initial program pulse width J (59),
Data corresponding to "additional program pulse width" (60) and "maximum number of retries J (61)" are stored.

The PROM size (54) stores the capacity of the PROM in kilobytes.

The PROM name (55) is a name to be displayed on the screen when displaying PROM data, which will be described later, and the user can specify any name in the user registration data.

From PROM (56) is the identification number of PROM,
It consists of 2 bytes: manufacturer code and device code.

This value is used during automatic PROM determination, which will be described later.

The write voltage Vpp (57) is either 12.5 volts or 21 volts, and the power supply voltage Vcc (58) is either 5 volts or 6 volts.

The initial pulse width (59) and the additional pulse width (60) are O,
It is stored in units of 1m5ec.

The maximum number of retries (61) specifies the value of N shown in FIG.

Next, we will explain the PR of this embodiment, which handles data with the above-mentioned configuration.
The operation of the OM writer control procedure will be explained.

FIG. 8 is a flowchart showing the operation from starting the program until the user inputs a command and starts operation.

After starting the program, it is first checked to see if a PROM writer cartridge is installed (82). If the cartridge is not installed, an error message is displayed and the program is terminated (93).

Next, a buffer area is secured to store data read from the PROM or data read from a file on the disk (83). Here too, if a sufficient area cannot be secured, an error message is displayed and the program is terminated (93).

Next, after initializing the work area used by this program (84), a user-defined file, which is a collection of PROM data shown in FIG. 5, is read (85). This user-defined file is specified as a parameter when starting the program.

When the specified file is found, it is confirmed from the header that the file is a user file that can be used by this program, and then the data is read into the "user defined data area" shown in FIG. If the file is not found, or if the header check shows that it is not a user-defined file, data will not be read.

On the other hand, if a file name is not specified as a parameter, a file is searched for using the default file name, and if found, data is read from that file; if not found, data is not read.

When the program is finished up to this point, all the PROM data that can be used by this program will be in the area shown in FIG.

Next, insert the PRO into the socket of the PROM writer cartridge.
Assuming that M is installed, the ID of the PROM is read (86). At this time, if a PROM with an ID is installed, its ID is returned, and if a PROM without a twist is installed or no PROM is installed in the socket, 0FFFFh is returned. Next, the ID read here is sequentially compared with the ID of the PROM in the area shown in Figure 4, and a PROM with a matching ID is searched (8
8). If matching PROM data is found, the data is saved in a separate area (80), and if no matching PROM data is found, default PROM data is saved in the area (89).

However, if the read value is 0FFFFh (87
) Save the default data without performing the above comparison (8
9).

The PROM data thus determined is displayed in the upper right corner of the screen as shown in FIG. 7 (91). Thereafter, a prompt for command input is displayed and the system waits for command input (92).

FIG. 6 is a flowchart illustrating a method of displaying currently selected PROM data. First, P on the top line of the screen.
The ROM ROM position display position sol is set (72). Then PRO is selected from the PROM data that has already been determined.
Displays the two characters of the MROM name. Next, the write voltage VPP is read out (75). Since this value is stored as O or 1, it is determined whether it is 0 or 1 and if it is 0, it is 12.
5V (76), and if it is 1, it is displayed as 21V (77).

Next, the initial pulse width is read out (78). This value is O,1
Since it is stored in m5ec units, when displaying it, 1
Display the quotient divided by 0 in the positive part and the remainder in the decimal part (
79).

Usually this PROM data is displayed immediately before the prompt is displayed. Thereby, even if the previously displayed data disappears from the screen due to scrolling, the PROM data can always be displayed at the upper right of the screen when inputting the next command. This allows the user to select the currently selected PR
The type of OM can be determined at a glance.

By inputting arbitrary commands from the keyboard when a prompt is displayed, the user can not only read/write PROM but also read/write files.

[Effect of the Invention 1 As explained above, according to the present invention, the currently selected PROM type is always displayed on the screen.
Not only can you check the PROM type at any time, but also
No operation is required to confirm the ROM type. Furthermore, it is also possible to prevent the PROM from being destroyed due to writing to a different type of PROM due to an error.

[Brief explanation of the drawing]

Fig. 1 is an external view of a portable computer into which a PROM writer cartridge of the present invention can be installed, Fig. 2 is a block diagram showing the hardware configuration of the above embodiment, and Fig. 3 is a PROM
FIG. 4 is an explanatory diagram showing the configuration of the area for storing PROM data. FIG. 5 is an explanatory diagram showing the configuration of PROM data. FIG. 6 is an explanatory diagram showing the configuration of PROM data. FIG. 7 is a flowchart explaining the procedure, FIG. 7 is a diagram showing an example of PROM data displayed on the screen, and FIG. 8 is a flowchart explaining the operation of the PROM writer control means. 24: External memory 30: Interface and above Applicant: Seiko Epson Co., Ltd. Representative Patent Attorney Kizobe Suzuki and 1 other person 21: CPU 25: Display device 22: R
AM 27: Keyboard 23: ROM
29: PROM Writer No. 1 N i':, :C 2 Questions Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] a control means for controlling a cartridge-type PROM writer attachable to a portable computer; a means for reading a file consisting of data used in the control means; a means for accessing the PROM using said data; A PROM writer characterized in that it has means for displaying data regarding the PROM being written.