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vchip8
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Basic CHIP-8 full implemented

This commit is contained in:
Vinicius Silva 2024-02-20 19:03:48 -03:00
parent 835f969963
commit be61d2cedf
8 changed files with 21 additions and 233 deletions
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BIN
Display.pdf
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0
CHIP8_GUIDE.pdf → docs/references/CHIP8_GUIDE.pdf
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0
CHIP8_WIKI.pdf → docs/references/CHIP8_WIKI.pdf
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0
chip8ref.pdf → docs/references/chip8ref.pdf
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roms/Chip8 Picture.ch8 Normal file
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205
roms/test_opcode.8o
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@ -1,205 +0,0 @@
:alias x0 v8
:alias x1 v9
:alias x2 vA
:alias y vB
: imageok
0xEA 0xAC 0xAA 0xEA
: imagefalse
0xCE 0xAA 0xAA 0xAE
: im0
0xE0 0xA0 0xA0 0xE0
: im1
0xC0 0x40 0x40 0xE0
: im2
0xE0 0x20 0xC0 0xE0
: im3
0xE0 0x60 0x20 0xE0
: im4
0xA0 0xE0 0x20 0x20
: im5
0x60 0x40 0x20 0x40
: im6
0xE0 0x80 0xE0 0xE0
: im7
0xE0 0x20 0x20 0x20
: im8
0xE0 0xE0 0xA0 0xE0
: im9
0xE0 0xE0 0x20 0xE0
: imA
0x40 0xA0 0xE0 0xA0
: imE
0xE0 0xC0 0x80 0xE0
: imF
0xE0 0x80 0xC0 0x80
: imX
0xA0 0x40 0xA0 0xA0
:macro drawop A B {
i := A
sprite x0 y 4
i := B
sprite x1 y 4
}
: testAX
#test Ax
i := imageok
sprite x2 y 4
return
: test1x
i := imageok
sprite x2 y 4
jump endtest
: main
x0 := 1
x1 := 5
x2 := 10
y := 1
v5 := 42
v6 := 43
#test 3x
drawop im3 imX
i := imageok
if v6 != 43 then i := imagefalse
sprite x2 y 4
#test 4x
y := 6
drawop im4 imX
i := imagefalse
if v5 == 42 then i := imageok
sprite x2 y 4
#test 5x
y := 11
drawop im5 imX
i := imagefalse
if v5 != v6 then i := imageok
sprite x2 y 4
#test 7x
y := 16
drawop im7 imX
i := imagefalse
v6 += 255
if v6 == 42 then i := imageok
sprite x2 y 4
#test 9x
y := 21
drawop im9 imX
i := imagefalse
if v5 == v6 then i := imageok
sprite x2 y 4
#test AX
y := 26
drawop imA imX
testAX
#test 0E
x0 := 23
x1 := 27
x2 := 32
y := 1
drawop im0 imE
i := imageok
sprite x2 y 4
#test 8xy0
y := 6
drawop im8 im0
i := imagefalse
v7 := v5
if v7 == 42 then i := imageok
sprite x2 y 4
#test 8xy1
y := 11
drawop im8 im1
i := imagefalse
v7 := 42
v7 |= y
if v7 == 43 then i := imageok
sprite x2 y 4
#test 8xy2
y := 16
drawop im8 im2
i := imagefalse
v6 := 120
v7 := 31
v7 &= v6
if v7 == 24 then i := imageok
sprite x2 y 4
#test 8xy3
y := 21
drawop im8 im3
i := imagefalse
v6 := 120
v7 := 31
v7 ^= v6
if v7 == 103 then i := imageok
sprite x2 y 4
#test 8xy4
y := 26
drawop im8 im4
i := imagefalse
v6 := 140
v7 := 140
v7 += v6
if v7 == 24 then i := imageok
sprite x2 y 4
#test 8xy5
x0 := 44
x1 := 48
x2 := 52
y := 1
drawop im8 im5
i := imagefalse
v6 := 140
v7 := 120
v7 -= v6
if v7 == 236 then i := imageok
sprite x2 y 4
#test 8xy6
y := 6
drawop im8 im6
i := imagefalse
v6 := 224
v6 <<= v6
if v6 == 192 then i := imageok
sprite x2 y 4
#test 8xyE
y := 11
drawop im8 imE
i := imagefalse
v6 := 15
v6 >>= v6
if v6 == 7 then i := imageok
sprite x2 y 4
#test Fx55,Fx65
y := 16
drawop imF im5
i := 1000
v0 := 0
v1 := 48
save v1
i := 1001
load v0
i := imagefalse
if v0 == 48 then i := imageok
sprite x2 y 4
#test Fx33
y := 21
drawop imF im3
i := 1000
v6 := 137
bcd v6
load v2
i := imageok
if v0 != 1 then i := imagefalse
if v1 != 3 then i := imagefalse
if v2 != 7 then i := imagefalse
sprite x2 y 4
#test 1x
y := 26
drawop im1 imX
jump test1x
: endtest
loop
again

22
src/chip8.v
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@ -95,17 +95,18 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
mut is_jump := false
chip.is_draw = false
//println(opcode_lsb)
match opcode_msb{
0x0000 {
match opcode_msb {
0x00EE {
match opcode_lsb {
0xEE {
chip.pc = chip.stack.pop() or { panic(err) }
// Returns from a subroutine
}
0x00E0 {
0xE0 {
chip.is_draw = true
for i := 0; i < chip.screen.display_height; i++{
for j := 0; j < chip.screen.display_width; j++ {
@ -114,9 +115,13 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
}
}
else {
nnn = instruction & 0x0FFF
//0NNN {
// nnn = instruction & 0x0FFF
// Calls machine code routine
//}
else{
panic('Invalid instruction! 0x${instruction.hex()}')
}
}
}
@ -260,7 +265,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
}
else{
panic('Invalid instruction!')
panic('Invalid instruction! 0x${instruction.hex()}')
}
}
@ -313,10 +318,9 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
for x_coord := 0; x_coord < 8; x_coord++ {
if pixel & (0x80 >> x_coord) == 1 {
if (pixel & (0x80 >> x_coord)) != 0 {
if chip.screen.display[regvy + y_coord][regvx + x_coord] == 1 {
chip.v[f] = 1
//chip.screen.display[regvy + y_coord][regvx + x_coord] = 0
}
chip.screen.display[regvy + y_coord][regvx + x_coord] ^= 1
@ -385,7 +389,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
//},
else {
panic('Invalid instruction!')
panic('Invalid instruction! 0x${instruction.hex()}')
}
}
if !is_jump { chip.pc += 2 }

25
src/main.v
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@ -39,7 +39,11 @@ fn (mut emulator Emulator) load_rom() !{
}
}
fn draw_screen(mut emulator Emulator){
fn frame(mut emulator Emulator){
emulator.graphic.begin()
emulator.chip8.run()
display_height := emulator.chip8.screen.display_height
display_width := emulator.chip8.screen.display_width
@ -54,6 +58,7 @@ fn draw_screen(mut emulator Emulator){
}
}
}
emulator.graphic.end()
}
fn (mut emulator Emulator) show_display(){
@ -138,10 +143,6 @@ fn is_graphic() bool{
return os.environ()['DISPLAY'] != ''
}
fn frame(){
print('oi')
}
fn main() {
mut emulator := &Emulator{
@ -158,23 +159,11 @@ fn main() {
width: 1280
height: 640
window_title: 'V CHIP-8 Emulator'
frame_fn : draw_screen
frame_fn : frame
user_data: emulator
)
for{
emulator.chip8.run()
emulator.graphic.quit()
if emulator.chip8.is_draw {
emulator.graphic.begin()
emulator.show_display()
emulator.graphic.end()
}
}
}else{
panic('System is not graphic!')