25,161
edits
Changes
no edit summary
The ROM address range is divided by 5 page bits (page 0-31) with 64 10-bit words each, addressed by the 11-bit [https://en.wikipedia.org/wiki/Program_counter program counter].
A stack of four registers (ST1-ST4) is used to call subroutines by the CAL instructions and to return by RTN <ref>[https://cdn.datasheetspdf.com/pdf-down/H/D/4/HD44801_Hitachi.pdf Hitachi HD44801] (pdf)</ref>.
=See also=
* [[Mini Chess#160 Nibble Challenge|160 Nibble Challenge]]
* [[SAM]]
=Chess Programs=
* [[:Category:HMCS4xC]]
=PublicationPublications=
* [https://www.amazon.com/Steve-A-Money/e/B001KIF2N6/ref=dp_byline_cont_book_1 Steve A. Money] ('''1990, 2014'''). ''[https://books.google.de/books/about/Microprocessor_Data_Book.html?id=e0SoBQAAQBAJ&redir_esc=y Microprocessor Data Book]''. [https://en.wikipedia.org/wiki/Academic_Press Academic Press]
