Two small utility functions.
Converts the integer word in AB (A holds high byte, B holds low byte) to a floating-point number. BUG: This code is completely unused! The address of this function is stored at 0006, but nothing ever uses it. It's probably needed by 8K or other bigger BASICs, but has accidentally been compiled into this 4K version.
| 07F9 | 50 | FWordToFloat | MOV D,B | |
| 07FA | 1E00 | MVI E,00 | ||
| 07FC | 0690 | MVI B,90 | exponent=2^16 | |
| 07FE | C3EA09 | JMP FCharToFloat+5 |
Adds 0.5 to FACCUM.
| 0801 | 210B0C | FAddOneHalf | LXI H,ONE_HALF | Load BCDE with (float) 0.5. |
| 0804 | CD200A | FAddMem | CALL FLoadBCDEfromMem | |
| 0807 | C31208 | JMP FAdd+2 |