Blitz Emulator

Here is my lastest project


You can download it free from my homepage

Hi Gav,

What are the controls for the games/emulator?

I have always wanted to do something like an Atari VCS emulator as a challenge. How do you go about creating an emulator though?
Do you write a function for each of the CPU opcodes and instructions?

jb-
I don't know Gav's method, but just about all 8 bit emulators AFAIK do what you say. Someone wrote a spectrum emulator using Blitz - you could get hold of the code at one stage. I don't know where it is, but a web search may throw something up if ur interested.

Ahhh ... BlitzArcade has source code. Nice.
I guess the next big challenge is finding out how the graphics, sound, memory, and i/o works on said system.
Then suss out the timing.

Hi JB

Yes I wrote a routine to execute each instruction (64 routines in total!).

CONSOLE BUTTONS ARE AS FOLLOWS:

"F1" Start

"F2" Select

"F3" Option

"F5" RESET CPU

It has 512 bytes of RAM ,yes thats right, less than 1K!
No one had heard of Mega-Bytes way back then!

Here is one of my 64 routines,

a= instruction opcode

Here is an Example of my source simplified to make it more
adaptable to anyone's needs.

Fantasic help. Lots of information for me to chew on.
Thanks Gav.

How do you control two clocks?
Say for example, a graphics clock at 3Mhz and a CPU clock at 1.5Mhz?

Im not sure ,if the older 8 bit consoles worked like that

Gav, What are the forum codes?

This is interesting, but I have to resist the temptation to get involved. I would love to write an emulator for some old beast...

Thanks for the link I was wondering how other people where adding images, etc

go on... emulate this :-)