Serial storage subsystem for a data processor

A data processing system comprising:

• first processor means for generating instructions and push and pop operation codes;
• random access data storage means coupled to said first processor means and including a plurality of data storage locations for storing data;
• second processor means coupled to said first processor means;
• a plurality of serial block storage means coupled to said second processor means and each including a plurality of data storage locations of variable widths for storing data, each of said data storage locations of said plurality of serial block storage means having a larger storage capacity than the storage capacity of each of said data storage locations of said random access data storage means;
• control means coupled to said first processor means and to said random access data storage means to receive said instructions and codes generated by said first processor means for addressing one of said plurality of data storage locations of said random access data storage means as an access window, such that data stored in said addressed one of said plurality of data storage locations of said random access data storage means is provided to said first processor means for transfer to said second processor means to permit said second processor means to address at least one of said plurality of storage locations of a corresponding one of said plurality of serial block storage means;
• said second processor means operable in response to said instructions generated by said first processor means for transferring data received from said addressed one of said plurality of data storage locations of said random access data storage means between said first processor means and at least one of said plurality of data storage locations of one of said plurality of serial block storage means;
• first buffer means coupled to said first processor means;
• and
• second buffer means coupled to said second processor means, wherein said first and second buffer means temporarily store data prior to data transfer between said first and second processor means.