// // Official Kernal routine, described in: // // - [RG64] C64 Programmer's Reference Guide - page 288 // - [CM64] Compute's Mapping the Commodore 64 - page 240 // // CPU registers that has to be preserved (see [RG64]): .A // MEMTOP: bcc memtop_set ldy MEMEND+1 ldx MEMEND+0 rts memtop_set: sty MEMEND+1 stx MEMEND+0 rts