Looking for 8080/Z80 BASIC

On Wed, Jan 4, 2012 at 3:30 PM, Randy Dawson <rdawson16 at hotmail.com> wrote: Here's what you get to play with under Microsoft ROM BASIC on the C-64... IERROR 0300-0301 768-769 Vector: Print BASIC Error Message IMAIN 0302-0303 770-771 Vector: BASIC Warm Start ICRNCH 0304-0305 772-773 Vector: Tokenize BASIC Text IQPLOP 0306-0307 774-775 Vector: BASIC Text LIST IGONE 0308-0309 776-777 Vector: BASIC Char. Dispatch IEVAL 030A-030B 778-779 Vector: BASIC Token Evaluation The drawback with grabbing the error vector is that part of what you may want to see has already gone past the parser pointer, so you either have to back that up, or accept some character overhead every time you want to "extend" the language. Since PET BASIC did not have these vectors and since many C-64 tool writers started with PETs, the typical mechanism was to jump in front of the regular parser (by patching the CHRGONE routine in low RAM), look for your own token, then either handle the rest yourself, or let the BASIC detokenizer handle it. A few cycles of overhead, sure, but the technique worked across multiple platforms. -ethan