Address Contents ======= ======== F5F0 Value of MAXRAM F661 CALL target address F678 Top of free RAM F962 Address of RAM directory FAAF Location of IPL string FAC0 Start of RAM address FB89 String descriptor (see 275D) FBB2 Next free RAM address FC82 MAXFILES value FC83 Pointer to BASIC file tables Subroutines =========== RST 4 Outputs contents of A register to display. 275D Gets string space for the length specified in A. The descriptor is stored at FB89. 4222 Perform CR/LF on display. 52BB Place telephone on hook. 52D0 Take telephone off hook. 532D Dial telephone number pointed to by HL. 6D3F Sends the character in A to the parallel printer port. 7283 Scan the keyboard, return key in A. If no key the Z flag is set.