Help with 4k BASIC
Posted: February 15th, 2014, 11:30 amWhat is the bootstrap loader and leader detector for 4k BASIC 3.2 and 4.0 to load from the Cassette Interface?
Bootstrap loaders for 4K BASIC v3.2 are in Appendix A of the BASIC 1975 manual.
Bootstrap loaders for 4K BASIC v4.0 are in Appendix B of the BASIC 1977 manual.
The leader detector code is in the 88-ACR Cassette Interface manual on page 69. The code as listed will work for version 3.2 products. Change the byte at address 3 from octal 256 (0xAE) to octal 302 (0xC2) for 4.0 or newer Altair tapes.
You can also load bootstrap loaders into memory using the "Load .HEX File" menu option in the Clone's Configuration Monitor. Bootstrap loaders for 2SIO, SIO or Cassette are in sub-folders inside the BASIC-->Paper Tapes and Cassette folder.
Mike