JPS61189345U - - Google Patents
Info
- Publication number
- JPS61189345U JPS61189345U JP7176185U JP7176185U JPS61189345U JP S61189345 U JPS61189345 U JP S61189345U JP 7176185 U JP7176185 U JP 7176185U JP 7176185 U JP7176185 U JP 7176185U JP S61189345 U JPS61189345 U JP S61189345U
- Authority
- JP
- Japan
- Prior art keywords
- stack
- ram
- address
- counter
- microprogram
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Executing Machine-Instructions (AREA)
Description
図面はこの考案の一実施例を示すもので、第１
図は回路構成を示すブロツク図、第２図は第１図
の切替用ＲＡＭの構成を象徴する図である。
１１……ＲＯＭ、１１１……デコーダ、１２，
１７，２１……セレクタ、１３……共用ＲＡＭ、
１４……制御部、１５……切替用ＲＡＭ、１６…
…アドレスラツチ回路、１７……セレクタ、１８
……演算部、１９……スタツクカウンタ、２０…
…スタツク用ＲＡＭ、２１……セレクタ、Ｘ０，
Ｘ１，Ｘ２，Ｘ３，Ｘ４……レジスタ。
The drawing shows one embodiment of this invention.
The figure is a block diagram showing the circuit configuration, and FIG. 2 is a diagram symbolically showing the configuration of the switching RAM shown in FIG. 1. 11...ROM, 111...decoder, 12,
17, 21...Selector, 13...Shared RAM,
14...control unit, 15...switching RAM, 16...
...Address latch circuit, 17...Selector, 18
...Arithmetic unit, 19...Stack counter, 20...
...RAM for stack, 21...Selector, X0,
X1, X2, X3, X4...Register.
Claims (1)
るスタツクＲＡＭと、このスタツクＲＡＭのアド
レスを指定するスタツクカウンタと、このスタツ
クカウンタの出力により上位アドレスを指定され
、サブルーチンのレベルに応じた記憶エリアが選
択される切替ＲＡＭとを具備したことを特徴とす
るマイクロプログラム制御による電子機器。 A stack RAM that sequentially stores return addresses of subroutines, a stack counter that specifies the address of this stack RAM, and an upper address is specified by the output of this stack counter, and a storage area is selected according to the level of the subroutine. An electronic device controlled by a microprogram, characterized in that it is equipped with a switching RAM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7176185U JPH0418043Y2 (en) | 1985-05-15 | 1985-05-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7176185U JPH0418043Y2 (en) | 1985-05-15 | 1985-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61189345U true JPS61189345U (en) | 1986-11-26 |
| JPH0418043Y2 JPH0418043Y2 (en) | 1992-04-22 |
Family
ID=30609543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7176185U Expired JPH0418043Y2 (en) | 1985-05-15 | 1985-05-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0418043Y2 (en) |
-
1985
- 1985-05-15 JP JP7176185U patent/JPH0418043Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0418043Y2 (en) | 1992-04-22 |