🚀 go-pugleaf

In article <C1FM4F.81w@mentor.cc.purdue.edu>, furthd@sage.cc.purdue.edu (Dan Furth) writes:
|> 
|> 
|>   Hello, I am a Lynx user, and this is my first time writing to this news
|> group. Anyway, I had an idea, and I wondered if anyone else had ever,
|> heard of this being done or thinks that it would be possible. The lynx-up
|> feature of the Lynx system is great, except for the fact that 
|> you need two of the same cartridge to play. What would happen if you
|> constructed a box, in which you inserted the game cartrigde. Then 
|> from that box had two sets of wires coming out ended in a cartridge type
|> tip(those small metal teeth on the bottom of the game cartridges). 
|> Would it be possible to "fool" the lynx systems into believing there are
|> two separate game cartridges, even though it is just one game with two
|> sets of leads?             Any speculation or rumors would be appreciated.
|> 


	Besides the legallity of this issue, which I will not bring up for the
sake of the bandwidth requirements involved, there is another issue.
When reading a ROM, a CPU sends and address combination to the ROM and a read
request is generated. Then the CPU reads the data from the data lines.  
The major problem involved here is when a CPU in one unit generates a memory
request and this request is interrupted by a request by the other unit.  I 
guarantee that your data will be corrupted almost instantaneously.  Also you
risk the chances of blowing the rom when an address line receives double the 
current and voltage necessary to drive it.
	This can be done if you put circuitry between the rom and the reading
unit to control the flow of data and address requests. It is not an easy task,
but nevertheless possible.