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About arudzki

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    Space Invader

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  1. All, I have a question about sending out serial messages from the XL/XE. If I have a board with a UART on it, can I just use the DATAIN, DATAOUT and COMMAND signals on the SIO port and handle the serial communication myself with code and the POKEY registers? Secondly, are there any tutorials on doing this? Thanks in advance. Tony
  2. All, I've been out of the Atari scene for a while and want to get back into it. I'm looking for someone who is looking to unload a mega ste that is just collecting dust on a shelf somewhere... maybe their wife/girlfriend has given them an ultimatum of "its either me or that atari thing!" and i'll be doing them a favor and saving their relationship. That's the kind of guy I am. Anyway, just drop me a line if you're in that kind of situation....oh and tell your significant other that I said you're a really nice guy! TonyR
  3. Curious - what is your project? A portable savegame box? peace! =falcon Actually, I was looking at doing an TCP/IP cartridge for the 8-bit. I know others have / are working on one, but everyone seems to be taking the Crystal 8900 approach, when there are better(in my opinion) options out there. I could be wrong, but thats the point in prototyping, right? So, why the need for SPI? Microchip makes an eeprom that contains a 48 bit unique address that they suggest can be used as a MAC address if additional bits (0xFFFF) are inserted in the middle. I was thinking that it might be good to have on board storage for internet addresses/ports as well as being able to read that 48/64 bit number. Tony
  4. Does anyone have the code or schematic required to read or write from an EEPROM (SPI Mode) contained in a cartridge? Odd question, I know. I'm making a bit of hardware that goes into the left hand cart slot and would like to store and read values to the EEPROM. The stickler is that the EEPROM also contains a unique serial number which is why I am using the part in the first place. Has anyone done this? Thanks Tony
  5. All, I have an odd question. If I wanted to offer a cartridge for sale with a game or hardware mod inside, where could I get a case without buying an old cart, cracking it open and recycling it? Does anyone sell the cartridge shells and have dimensions for the PCB that fits inside? Thanks Tony
  6. Carmel, Are you thinking of something like this? [see attachment] This idea was from years ago where I was just thinking about adding internal slots. The case? The board is sized for an Apple IIe case (which are readily available). Now, it would have to be re-thought with the advent of USB host chips and the video mod. Anyway, food for thought. TonyR
  7. Actually, what I'm looking for may be DDT in the MAC/65 cart. It looks like it will allow me to single step and examine values...which is what I'm looking for. Thanks for the help. TonyR
  8. All, I suspect I already know the answer, but: If you're developing hardware for the 8bit, for example, an A/D converter and you put the circuit into a cartridge. To write the code to test it, you need to write a display interface to display the results of your read, correct? In other words, there isn't an interface like an ICE to be able to check values or single step and examine register or variable values in 'real time' is there? I'm thinking that it's going to be a lot of poking and hoping.... am I right? The A/D example above was just an example. I'm thinking of something more complex, so I may have to do something where I dump registers to the screen to verify or check values... Thanks Tony
  9. Is there a list somewhere of what devices are located where in the $D5xx range? thanks Tony
  10. All, I have a hardware question regarding the carts in the 8-bit computers. Several of the signals are pulled low, I assume, when a window of memory is accessed (I think one of the signals is A000 - BFFF). My question is, are these signal activated even if the cart doesn't "announce" itself to the system? I'm thinking of putting some memory mapped hardware in a cart and using the signals for control. I don't know if the signals are active (including the /CS signal too) if the carts don't announce themselves to the system. Any help would be appreciated. Thanks Tony
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