Jordan Earls
A project to implement a console using the Mbed using VGA for video output and a PS/2 keyboard for the input. The eventual goal is to also include tools for managing SD cards, and a semi-self-hosting programming environment.
Dependencies: PS2_MbedConsole fastlib SDFileSystem vga640x480g_mbedconsole lightvm mbed
MbedConsole is a cool little project to have a self-contained computer all on an Mbed. So far it has VGA and PS/2 support and can stand alone without a computer powering it. Next planned features are SD card support and a lightweight programmable VM complete with a file editor and self-hosted assembler.
You can view additional details about it at http://earlz.net/tags/mbedconsole
Diff: forth_machine.cpp
- Revision:
- 7:2ac6752d47d2
- Parent:
- 6:a4dff59ef214
- Child:
- 8:f356684767ef
--- a/forth_machine.cpp Fri Sep 21 04:53:45 2012 +0000
+++ b/forth_machine.cpp Sat Sep 22 03:00:55 2012 +0000
@@ -80,18 +80,19 @@
int forth_execute(uint8_t* block, int length)
{
- int pos=0;
+ uint16_t pos=0;
while(pos<length)
{
-
+ serial.getc();
Opcode op=(Opcode)block[pos];
- //printf("opcode: %x\n",(int)op);
+ printf("opcode: %x\r\n",(int)op);
switch(op)
{
case BranchTrue:
if(pl_pop()){
pos++;
pos=*((uint16_t*)&block[pos]);
+
}else{
pos+=3;
}
@@ -100,8 +101,10 @@
if(!pl_pop()){
pos++;
pos=*((uint16_t*)&block[pos]);
+ serial.printf("branch false %x\r\n",(int)pos);
}else{
pos+=3;
+ serial.printf("branch false skip %x\r\n", (int)pos);
}
break;
case Branch:
@@ -143,6 +146,8 @@
((BuiltinFunction)tmp)();
pos+=4;
break;
+ case Ret:
+ return;
default: