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Erick
2022-02-13 18:10:33 +01:00
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@@ -12,7 +12,7 @@ Instructions are 16 bits wide and have 4-bit opcodes. The instruction set define
### Hardware ### Hardware
TyVM is a very barebone VM that has: TyVM is a very barebone VM that has:
- 128kb memory - 128kb of memory
- 16 opcodes - 16 opcodes
- 10 registers - 10 registers
- 3 condition flags - 3 condition flags
@@ -47,7 +47,7 @@ uint16_t registers[RG_COUNT];
#### Instruction set #### Instruction set
TyVM has n.16 16-bit opcodes, that instructs the machine to do some simple calculation: TyVM has n.16 16-bit opcodes, that instructs the machine to do some simple calculation:
```c ```c
enum { // [name, 8-bit value] enum { // [name, 8-bit value]
OP_BR = 0, // branch, 0000 OP_BR = 0, // branch, 0000
OP_ADD, // add, 0001 OP_ADD, // add, 0001
OP_LD, // load, 0010 OP_LD, // load, 0010
@@ -68,11 +68,11 @@ enum { // [name, 8-bit value]
``` ```
### Logic ### Logic
- [10] Load instruction from memory at program counter [RG_PC] address; - [10] Load instruction from memory at program counter [RG_PC] address;
- [20] Increment RG_PC; - [20] Increment RG_PC;
- [30] Read opcode for next instruction; - [30] Read opcode for next instruction;
- [40] Perform instruction read in 40; - [40] Perform instruction read in 30;
- [50] Goto 10; - [50] Goto 10;
### Build ### Build
On file "preprocessor.c" define the OS where you want to run TyVM. Comment out the following line if you want to build for Windows, otherwise it will build for Unix: On file "preprocessor.c" define the OS where you want to run TyVM. Comment out the following line if you want to build for Windows, otherwise it will build for Unix:
@@ -97,9 +97,9 @@ make
Below is a hello-world program for `TyVM`, the assembled program can be found in `asm/` directory Below is a hello-world program for `TyVM`, the assembled program can be found in `asm/` directory
```shell ```shell
.ORIG x3000 .ORIG x3000
LEA R0, HENLO_WORLD LEA R0, HELLO_WORLD
PUTS PUTS
HALT HALT
HELLO_STR .STRINGZ "Henlo World!" HELLO_STR .STRINGZ "Hello World!"
.END .END
``` ```