Chip16 Official thread (Development/Suggestions)

[paul_nicholls]

Originally Posted by refraction

8bit read/writes arent uncommon for higher machines. Even the PS2 has 8bit memory read/writes :P It's also not like we have too many store/load functions already.

I think most real-world assembly language opcodes include an 8-bit load/store opcode
I think ours should too

[tykel]

Hello guys, I am quite busy with RL at the moment, so I don't really have the time to come here or work on my emu.
I like the idea of 8 bit load/stores, although they are not strictly necessary as tronix pointed out; if we add them, we should strive to fit them in a consistent way into the ISA though.
The MOD should definitely be in, I'm surprised it isn't already!
Let's cook up a draft and we can review that

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[paul_nicholls]

Ok, how about this as a draft of the additions to the spec for MOD and load/store 8-bit values:


MOD operations

A3 0X LL HH	MODI RX, HHLL		Mod immediate value with register X. Remainder is stored in register X. Affects [c,z,n]
A4 YX 00 00	MOD RX, RY		Mod value of register Y with value of register X. Remainder is stored in register X. Affects [c,z,n]
A5 YX 0Z 00	MOD RX, RY, RZ		Mod value of register Y with value of register X. Remainder is stored in register Z. Affects [c,z,n]

load 8-bit values

25 0X LL HH	LDB RX, HHLL		Load low-byte of register X with the 8bit value at the specified address. high-byte of RX is zeroed.
26 YX 00 00	LDB RX, RY		Load low-byte of register X with the 8bit value at the specified address pointed by register Y. high-byte of RX is zeroed.

store 8-bit values

32 0X LL HH	STB RX, HHLL		Store low-byte value of register X at the specified address.
33 YX 00 00	STB RX, RY		Store low-byte value of register X at the specified address pointed by register Y.

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Last edited by paul_nicholls; August 20th, 2012 at 12:33..

[sammy jankis]

Hello people

I write simple emulator for AVR controller.
My hardware : AtMega32 + L2F50 + 62256( x2 for 64k SRAM)

All emul write on C.
I use this :

http://habrahabr.ru/post/146496/ (russian)
RefCHIP16: code.google.com/p/refchip16/downloads/list
chip16debugger: code.google.com/p/chip16debugger/downloads/list

Tested : BC_TestRom.c16 OK!
PaleteTest.c16 OK!
Maze.c16 OK!
other now tested

BAD display , he very slow and less memory
All rom copy on external sram (controlled programm, not hardware)

Real emulate frequency CPU : min 4MHz (slowly command - DRW,RND ....other ) max 16MHz

All project requires videocontroller + VRAM for fast work
Ihave idea.

video http://www.youtube.com/watch?v=SENqERoeu3s




NOT work : all sound (im work on this) , flip (work only flip 0,0) , drawing func (bad , bugged ) , vblnk (not requir, uC drawing sprite in real time, not VRAM )

NOT tested : PAL, RND


and BUUuuuugggggg

srs :
AVCHIP16.rar

Sorry for my bad english

[tronix286]

Originally Posted by sammy jankis

Hello people

I write simple emulator for AVR controller.
My hardware : AtMega32 + L2F50 + 62256( x2 for 64k SRAM)

Awesome work, sammy jankis! Congratulation!

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CHIP-16 Debugger

[ShendoXT]

Wow, as tronix286 already said it's awesome.
Hehe, if you encase this in something it would be a C16 console

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Don't PM or ask me about VMP-MCR conversions. I will ignore you if you do.

[Bill_gates]

wow thats pretty cool!

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[paul_nicholls]

That is very cool Sammy, awesome

[sbeng]

Hi,
i've created a simple C# form project that read BTC_Test_Rom. When it does run, it prints green screen e some pixel and it not does print text.
I've attached my code.
Can you help me?
Thank you and best regards.

Attached Files

code.txt (54.3 KB, 11 views)

[ShendoXT]

From the Readme:

/****************/
IMPORTANT
/***************/

Before using this test rom, you should check manually:

- 14 00 LL HH CALL HHLL
- 20 0X LL HH LDI RX, HHLL
- 23 YX 00 00 LDM RX, RY
- 24 YX 00 00 MOV RX, RY
- 10 00 LL HH JMP HHLL
- 40 0X LL HH ADDI RX, HHLL , check the carry flag
- 50 0X LL HH SUBI RX, HHLL , check the carry flag and zero flag
- 31 YX 00 00 STM RX, RY
- 61 YX 00 00 AND RX, RY
- 90 0X LL HH MULI RX, HHLL
- 05 YX LL HH DRW RX, RY, HHLL

Have you tried some other ROMs (from the package)?

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Don't PM or ask me about VMP-MCR conversions. I will ignore you if you do.

[sammy jankis]

Thank you all

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Last edited by sammy jankis; September 8th, 2012 at 12:04..

[sbeng]

Originally Posted by ShendoXT

From the Readme:

Have you tried some other ROMs (from the package)?

Yes, other roms do not work perfectly in my emulator?
Opcodes listed below are correct in my code?

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Last edited by sbeng; September 8th, 2012 at 18:31..

[sammy jankis]

hi



I have the idea of ​​a new command.
it will complement the old SPR and DRW
new fully compatible with older

04 N0 LL HH	SPR N ,HHLL		Set the size of the sprite number N: width (LL) and height (HH)
05 YX LL HH 	DRW RX, RY, HHLL        Draw the sprite number 0, from memory addresses HHLL the coordinates specified in the registers X and Y. The result affects the carry flag.
06 YX 0Z N0 	DRW N, RX, RY, RZ       Draw the sprite from memory address pointed to by register Z coordinates specified in the registers X and Y.  Number of sprite N. The result affects the carry flag.

N - 4bit value or mb NN - 8 bit value ?

Now we can have an array of sizes sprites.
if N paramet = 0 this old programm all work and new too.
if N not 0 , old prog also work (not use this param in opcode) and new prog work!

[refraction]

the only drawback to that is we would have to allocate a space in memory for it, so we are starting to slowly eat away at our limited memory space for the sake of remembering 15 sprite sizes.

You are essentially substituting having to do SPR everytime with having to move the memory address in to RZ every time :P Tho i guess if things are drawn in a tight loop of similar size, it would be reasonably useful. If we did have it though, i recon we should have an 8bit index rather than 4. 15 sprites seems rather limited

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My Chip16 Emulator RefChip16 http://code.google.com/p/refchip16/

[sammy jankis]

Hello!
how are things?

I was interested in reading the documentation ARM architecture.
you thought about removing registers PC, SP? And the use of GPR?
I want to sketch a simple code of a multitasking operating system.
new registers to facilitate this and to remove unnecessary commands.
to switch application will use the interrupt handler placed after 0xFFF4 address or destination address on the handler.
interrupt will vblank. and will be a transition to 0xFFF4-0xFFFF

code of the program will be inactive Peren to higher addresses. active - 0x0000

You can also use something like a phantom shift register, which will be added to the PC, the switch from application to application, located in several locations.

all just for lulz

[refraction]

It will never be removed. CPU registers and program counters and stacks are fundamental parts of computing, especially in emulation, without gpr's, emulating instructions is pretty much impossible or at least inaccurate in how a CPU works.

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Dont PM me for help, use the forums, thats what its for!

My Chip16 Emulator RefChip16 http://code.google.com/p/refchip16/

[sammy jankis]

you do not understand me.
just replace such

example :

general-purpose register R0 - R12

PC = R13
SP = R14
Status Reg = R15

and del
commnd used sp and pc , sr.

they will simply registers.
will be easy to work and reduce the number of commands.

now SP gradually lose its significance

[tykel]

Well, although it is a nice idea, it would be too significant a change at this stage. It reminds me of the ARM architecture somewhat.
The most we can do now, though, is add instructions if a serious need is proven.

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mash16 (chip16 emulator) img16 (chip16 sprite converter)
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[tronix286]

Hi all!

Just for fun i ported my emu to MS-DOS with modex 320x240, so it can possible run chip16 demos on system, which supported DosBox (Win mobile, Symbian, Android, jailbreaked iPhone and other platforms).

Nokia 5230 Symbian 9.4:
P1110228_измен.размер.JPG

Pocket LOOX 720 Windows Mobile 2003 se:
P1110234_измен.размер.JPG

Oldschool 80486 (Am5x86 133 P75) notebook running at realy MS-DOS v6.22:
P1110233_измен.размер.JPG

Speed ​​is not good, even on real 486 hardware. Need heavy optimization.

Attached Files

CH16_dos.rar (24.6 KB, 3 views)

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Last edited by tronix286; October 1st, 2012 at 08:34..

[tykel]

You never cease to impress, tronix. Good job

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tchip16 (chip16 assembler) Js16 (browser chip16 emulator)
mash16 (chip16 emulator) img16 (chip16 sprite converter)
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Desktop: i5 750 @ 3.6 Ghz, 4GB ram, GTX 570 OC | Windows 7 Pro 64
Laptop: (Thinkpad) i5 430M, 4GB ram, Intel IGP | Arch Linux, Windows 7 Pro 64