Garry Epps put together this disk of programs which are useful when writing assembly language programs. ASM.PRG -- The standard Compucolor 8080 assembler. The manual is here: http://www.compucolor.org/docs/Compucolor_II_Assembler_Operating_Manual.pdf MLDP.PRG -- Compucolor Machine Language Debug Package. The manual is here: http://www.compucolor.org/docs/Machine%20Language%20Debug%20Package%20User%27s%20Manual.pdf DFM.PRG -- This is a disk clean up utility. It allows deletion of numerous files in one batch (when you go through the edit-compile-run cycle a few times you end up with lots of files to delete). EDITOR.PRG -- Screen-oriented editor, useful for editing program source. EDITOR supported files bigger than could fit in memory at one time, so you had the concept of "next" blocks of files that you bring into memory whie it writes out the current section. You couldn't move backwards, just forward as files were all sequentially accessed on the disk. Compucolor EDITOR COMMANDS ========================== color pad moves cursor black/blue = back/forward 1 page red/magenta = back/forward 4 lines green/cyan = back forward 1 line yellow/white = back/forward one character Shift-TAB, skip to next TAB shift uparrow = top of file shift downarrow = bottom of file F0=exit without saving F1=save then exit <> ESC = enter search string, then ESC to enter replace string, then ESC F8=search backwards F9=search forward ctrl-F8=replace backwards ctrl-F9=replace forward CMD-C mark for COPY block CMD-M mark for MOVE block CMD-D mark for DELETE block CMD-A copy/move marked block After cursor CMD-B copy/move marked block Before cursor CMD-E EXIT CMD-S SAVE CMD-N NEXT CMD-R READ CMD-W WRITE <>