JPS59180872A - Memory bank system - Google Patents

Abstract

PURPOSE:To eliminate the need for confirmation of the slot position when the number of memory cards is increased with no generation of unnecessary slots and also to eliminate the need for change of wirings, by using a means which produces a selection signal in response to a bank designation switch and the bank designation information. CONSTITUTION:For a memory card to which a bank B2 is designated by a dip switch 14, the card capacity is added with the capacity informtion given from a card preceding by a stage by an adder 10. Then the value added by a signal ''1'' given from a coincidence circuit 13 is sent to a card of the next stage via a multiplexer 11 in the form of the bank capacity. At the same time, the signal on an address signal line 17 exists within an output value range of the adder 10. Then a card selection signal is generated from an AND gate 15 which receives the signals ''1'' from a comparator 16 and a coincidence circuit 13, respectively. In such a way, a memory card 123 is added to the bank B2 for increment of its capacity. This eliminate the need for change of wirings when the slot position is confirmed or the number of memory cards is increased. Thus it is possible to avoid generation of unnecessary slots.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a bank system, and more particularly, to a memory bank system in which a means for increasing the capacity of a bank constituted by a memory card is improved.

<a> Background of the Technology Some information processing devices such as computers are configured so that their processing capabilities can be expanded.

In such a case, an increase in storage capacity is inevitably required.

One way to respond to this increase in capacity is to add more memory cards, but in the conventional technique, the banks made up of memory cards are fixed, so when the capacity increases, The reality is that they are subject to various restrictions, and there is a demand for the development of technical means that can eliminate these problems.

(c) Prior Art and Problems One of the conventional methods for increasing bank capacity is as shown in FIG. In this example, banks B1, B2. B
Each memory card of 3 receives the capacity information 61 etc. of the previous stage memory card, adds its own capacity information from the card capacity supply device a to this capacity information, and sends it to the next stage memory card. At the same time, comparator d determines whether the address signal supplied through line C is within the range of the added capacitance information, and when there is an output, bank B
1 is specified, the decoder f through line 11
(G is a bank register in which bank designation data is entered.) The memory card is configured such that a card selection signal is generated by an AND gate h in response to a bank B1 designation signal sent from the bank B1 designation signal, and the memory card is accessed. and,
21 and 31 are memory cards for bank B1, 22.32 are memory cards for bank B2, 23 and 33 are memory cards for bank B3, 41.51 is an expansion slot for bank B1, and 42.52 is an expansion slot for bank B2. ,43.5
3 is an expansion slot of bank B3.

In the bank system configured as described above,
User A has two memory cards in bank B1, and another user B has two memory cards in bank B, 1. If user A wants to add one memory card to each bank B2. 2 slots in each bank B3, 4 slots in total, and for user B, 1 slot each in banks B1 and B2,
Two slots in bank B3, a total of four slots, will be wasted, and you will have to check the slot position where the memory card should be inserted.

Also, as shown in Figure 2, banks Bl' and B2''.

If B3' is configured as shown in Fig. 1 and has only two expansion slots, and two memory cards are to be installed, there will be no waste of slots, but 81'
, 82', etc., requires modification of the hardware. Each component in FIG. 2 is distinguished from the reference number of the corresponding component in FIG. 1 by adding a dash to the reference number.

(D) Purpose of the Invention The present invention was devised in view of the drawbacks of the conventional system as described above, and its purpose is to use slots commonly for each bank, instead of configuring banks by slot. To provide a memory bank system that does not require confirmation of slot positions when adding memory cards, does not generate extra slots, and does not require wiring changes.

g) Structure of the Invention The object of the invention is to provide a memory bank system configured by assigning each of a plurality of memory cards to a predetermined bank in response to a bank designation output of a bank register, in which each of the above-mentioned cards has a pre-stage memory card. capacity information generation means for generating capacity information up to the self-memory card, bank specification information generation means, and responsive to the bank specification information of the bank specification information generation means and the bank register; a selection signal generating means for generating a selection signal by selecting the selected memory card, and a selection means for receiving the selection signal and selecting and outputting one of the capacity information from the preceding memory card and the capacity information generating means. card selection means for generating a card selection signal for the own memory card in response to the address signal, capacity information from the capacity information generation means and the selection signal; The output of the memory card to be added is connected to the selection signal generating means of the memory card to be added, and the input part of the memory card to be added is connected to the output part of the selection means of the existing final memory card that is continuously connected. This is achieved by causing the bank designation information generating means of the memory card to generate predetermined bank designation information to increase the bank capacity.

(C) Embodiments of the Invention The present invention will now be described in detail with reference to the accompanying drawings.

FIG. 3 shows an embodiment of the present invention, and FIG. 4 shows the configuration of a memory card used in the embodiment of FIG. 3 related to the present invention. In FIG. 3, 1 is a central processing unit (not shown)
The output is connected to each memory card 3, 4 through the bank designation signal line 2, and the X-ray 2 is also connected to the memory card inserted into the expansion slot 5, 6. be. These memory cards are inserted into a common slot. 7 and 8 are capacity information lines, and 9 is a similar line, which is a capacity information line that is output from the memory card when it is inserted into the expansion slot 5.

These capacitive information lines, as shown in FIG.
1 input.

The other input of the adder 10 is connected to the output of the card capacity output device 12 of the card. The output of the adder is also connected to the input of multiplexer 11.

The bank designation signal line 2 described above is connected to the matching circuit 13 in FIG.
The output of the dip switch 14 is connected to the other comparison input of the matching circuit 13. DIP switch 14 may be replaced with a resistor.

The output of match circuit 13 is connected to the control input of multiplexer 11 and to one input of AND gate 15. The other input of AND gate 15 is connected to the output of comparator 16. The two inputs of comparator 16 are connected separately to the output of adder 10 and to address signal line 17.

Components such as those described above are provided in each memory card.

Next, a description will be given of how to increase the capacity of the memory bank using the memory card having the above configuration.

Now, six memory cards are inserted into the common slot as shown in Figure 5, and bank B1. Assume that it becomes necessary to increase the capacity of bank B2 of the memory bank system configuring B2°B3.

Insert a memory card with the increased capacity into the common slot, and connect the capacity information line of the second memory card (last memory card in cascade) 132 of bank B3 to the adder lO of the memory card 123 just inserted. Connect to the input using a one-touch connector, etc. Before or after inserting this card, the bank B2 is designated by the dip switch 14.

Prior to the addition of such a card 123, the DIP switch 14 of each memory card constituting each bank is set so that the corresponding bank can be specified in the same manner as described above.

Therefore, if the central processing unit sets data specifying a desired bank, for example, bank B2, in its bank register 1, only the memory card whose dip switch 14 is set to specify bank B2 will receive the data from the central processing unit. become accessible. That is, dip switch 1
4 is set to specify banks B1 and B3, no signal is output from the matching circuit 13, so the capacity information from the previous stage memory card is simply sent to the next stage via the multiplexer 11. With,
The input condition of the AND gate 15 is not satisfied by the "0" level signal of the match circuit 13, and no card selection signal is generated therefrom. However, the memory card whose bank B2 is designated by the DIP switch 14 is The capacity information from the previous memory card that belongs to the previous memory card bank and the card capacity of the memory card is added by an adder 10,
- The value added by the "1" signal from the number circuit 13 is sent to the next memory card via the multiplexer 11 as the bank capacity up to the memory card, and the address signal is sent within the range of the output value of the adder 10. There is an address signal on the line 17, a "1" signal is generated from the comparator 16, and a card selection signal is generated from the AND gate 15 which receives this signal and a "1" signal from the matching circuit 13. This is because it will be done.

In this way, the memory card 123 is added to bank B2 and used to increase the capacity of bank B2. Such relationships are the same for each bank.

As is clear from the above, even though the memory cards that make up each bank are installed in a common slot, the central processing unit can only handle memory cards from banks specified by the central processing unit. Invisible. This eliminates the trouble of checking the slot position when inserting the memory card into the slot. Furthermore, no wiring changes are required when adding memory cards, and no extra slots or slots are generated.

In the above embodiment, "1" or "
Although the multiplexer 11 and the AND gate 15 are controlled by generating a signal of "0", the output of the minus number circuit and the "
It is also possible to provide a common memory independent of banks by switching the output of the means generating the signal "1" to the switching means and supplying it to the multiplexer 11 and the AND gate 15.

(G) Effects of the Invention As described above, according to the present invention, ■ Memory cards belonging to each bank can be inserted into a common slot. ■ Therefore, it is not necessary to confirm the slot position. Effects such as no need for wiring changes at all during expansion, and no extra slots 7) are generated.

[Brief explanation of the drawing]

1 and 2 are diagrams showing the configuration of a conventional memory bank system, FIG. 3 is a diagram showing an embodiment of the present invention, and FIG. 4 is a diagram showing a memory cart according to the present invention used in the embodiment shown in FIG. FIG. 5, which is a diagram showing a related configuration, is a diagram for explaining an example of adding memory cards. In the figure, ■ is a bank register, 2 is a bank designation signal line, and 3 is a bank register.
, 4 is a memory card, 5.6 is an expansion slot, ? , 8.
9 is a capacitive information line, 10 is an adder, 12 is a card capacitor output device, 13 is a matching circuit, 14 is a dip inch, 15 is an AND gate, and 16 is a comparator.

Claims (1)

[Claims] +l) In a memory bank system configured by assigning each of a plurality of memory cards to a predetermined bank in response to a bank designation output of a bank register, each card is provided with capacity information of a preceding memory card. capacity information generating means for generating capacity information up to the self-memory card; bank designation information generation means; selection signal generation means for generating a signal; selection means for selecting and outputting either one of the capacity information from the preceding memory card and the capacity information generation means in response to the selection signal; an address signal supplied; and card selection means for generating a card selection signal for the self-memory card in response to the capacity information from the capacity information generation means and the selection signal, and when adding a memory card, the output of the bank register is added. The input section of the memory card to be added is connected to the selection signal generating means of the memory card to be added, and the input section of the memory card to be added is connected to the output section of the selection means of the existing final memory card connected in cascade. A memory bank system characterized in that the bank capacity is increased by causing a designation information generating means to generate predetermined bank designation information. (2) The memory bank system according to claim 1, wherein the selection signal output section of the selection signal generation means is comprised of means for effectively outputting the selection signal. (3) The selection signal output section of the selection signal generation means
2. The memory bank system according to claim 1, further comprising means for generating a signal for operating said selection means and said card selection means regardless of said selection signal.