7470A Plotter and the 41

[Mark Hardman]

From page 330 of Extend Your HP-41 by W.A.C. Mier-Jedrzejowicz, Ph.D.:

Quote:You can use BLDSPEC to create display characters not available from the Alpha keyboard; use CLX, ENTER - then put the character number, 0 to 127, into X and execute BLDSPEC. You can store this character or put it into the Alpha register by using ARCL. This method was used before synthetic methods or the Extended function XTOA were available. For byte values greater than 127, use CLX, ENTER, 1, BLDSPEC, c-128, BLDSPEC, where c is the character number.

HTH

Mark