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diff --git a/msp430/README.md b/msp430/README.md new file mode 100644 index 0000000..34d2ddb --- /dev/null +++ b/msp430/README.md @@ -0,0 +1,20 @@ +# msp430 implementation + +This is the MSP430 port of Alee Forth. It produces a binary that enters a REPL made available on the UART peripheral at 115200 baud. The specific target is MSP430G2553. + +## Building + +1. `make clean` (just in case) +2. `make msp430-prep`: Builds `alee` for the host computer and uses it to create an `alee.dat` blob containing bytecode for `forth/core.fth` and `forth/msp430.fth`. +3. `make msp430`: Produces `alee-msp430`, a standalone binary for the MSP430 with built-in core and msp430 word-sets. + +The final binary is < 11 kB and provides 150 bytes for user dictionary in RAM (assuming 512 bytes of total RAM). + +## msp430.fth + +The msp430 word-set makes programming for the MSP430 easier: + +* All register names are defined (P1OUT, ADC10MEM, etc.). +* `r!` and `r@` to write and read device memory (i.e. registers). +* `rset`, `rclr`, `rtgl` work like `r!` but set, clear, or toggle the given value/mask instead. + |