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资源说明：Python scripts for DCPU-16 emulation.
## DCPU-16 Emulator v1.7
### Download (Windows Installer)
See the downloads page:
https://github.com/fogleman/DCPU-16/downloads
### Implemented Specifications
- DCPU-16 1.7: http://pastebin.com/raw.php?i=Q4JvQvnM
- LEM1802: http://dcpu.com/highnerd/rc_1/lem1802.txt
- Generic Keyboard: http://dcpu.com/highnerd/rc_1/keyboard.txt
- Generic Clock: http://dcpu.com/highnerd/rc_1/clock.txt
### Screenshots
### Assembler Features
```dasm
; Macros (can be nested)
#macro BRK { NOP } ; ignore breakpoints
#macro push(x) {
SET PUSH x
}
; String Literals
DAT "Here is some text.", 0 ; null-terminated string
; Reserve block of memory
RESERVE 0xff
; Character Literals
SET A 'a' ; A = 0x61
SET B 'A' ; B = 0x41
; Negative Numbers
SET A -1 ; A = 0xffff
SET B -0xff ; B = 0xff01
; Breakpoints
BRK
; Opcode Aliases
SET A POP
SET A [SP++] ; equivalent to POP
SET PUSH A
SET [--SP] A ; equivalent to PUSH
SET A PICK 1
SET A [SP + 1] ; equivalent to PICK 1
SET A PEEK
SET A [SP] ; equivalent to PEEK
; Local Labels
:prefix
SET A 10
:.loop ; becomes prefix.loop
SUB A 1
IFE A 0
SET PC .done
SET PC .loop
:.done ; becomes prefix.done
; Fixed Labels
:screen @ 0x8000
```
### Hardware Enumeration
The following code enumerates available hardware devices and populates the variables lem, keyboard and clock with their respective hardware identifiers.
```dasm
#macro match_hardware(a, b, location) {
IFE A a
IFE B b
SET [location] I
}
JSR enumerate_hardware
; now you can use the devices, e.g.
SET A 0
SET B 0x8000
HWI [lem]
BRK
:enumerate_hardware
HWN I
:.loop
IFE I 0
SET PC .done
SUB I 1
HWQ I
match_hardware(0xf615, 0x7349, lem)
match_hardware(0x7406, 0x30cf, keyboard)
match_hardware(0xb402, 0x12d0, clock)
SET PC .loop
:.done
SET PC POP
:lem
DAT -1
:keyboard
DAT -1
:clock
DAT -1
```
### Benchmarks
Usage: python benchmark.py
Run benchmarks on the emulator to test performance.
MacBook Air (1.7 GHz Intel Core i5)
Benchmarking "C" emulator using "programs/life.dasm"...
Result: 88728989 cycles per second
The C implementation could emulate over 800 DCPU-16 processors at their 100 kHz clock rate.
### Pretty Print
Usage: python assembler.py programs/example.dasm > pretty_output.dasm
Assemble and output in pretty format. Shows machine code in comments. Comments from the input file are not retained.
```dasm
SET A, 48 ; 7c01 0030
SET [0x1000], 32 ; 7de1 1000 0020
SUB A, [0x1000] ; 7803 1000
IFN A, 16 ; c00d
SET PC, crash ; 7dc1 001a
SET I, 10 ; a861
SET A, 0x2000 ; 7c01 2000
:loop
SET [I + 0x2000], [A] ; 2161 2000
SUB I, 1 ; 8463
IFN I, 0 ; 806d
SET PC, loop ; 7dc1 000d
SET X, 4 ; 9031
JSR testsub ; 7c10 0018
SET PC, crash ; 7dc1 001a
:testsub
SHL X, 4 ; 9037
SET PC, POP ; 61c1
:crash
SET PC, crash ; 7dc1 001a
```
### Dependencies
- **Python 2.5+**: http://www.python.org/
- **PLY**: http://www.dabeaz.com/ply/
- **wxPython**: http://www.wxpython.org/
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