Setting up a 632k cart

[Setting up a 632k cart]

 

You either don't have a 32k memory expansion connected, or there is something wrong with it. That much is certain.

 

Gazoo

Thanks for the quick reply. I don't have a memory expansion yet so that would explain it!

 

Is it safe to assume that my cartridge is working properly then?

 

Thanks again,

Rob

 

[Setting up a 632k cart]

 

You either don't have a 32k memory expansion connected, or there is something wrong with it. That much is certain.

 

Gazoo

Thanks for the quick reply. I don't have a memory expansion yet - so is this the expected behaviour without the expansion? As I said, I'm new to all this!

[Setting up a 632k cart]

I wonder if someone can help me? I was given a TI99 for Christmas and bought an UberGROM cartridge and a 512K cartridge.

 

To test the UberGROM, I've burnt the SXB images from this thread to the 49F040 and ATMega1284P and that seems to have gone okay - reading back the images appears to confirm this.

 

The cartridge gives the menu but only the following options seem to work:

 

'C - Disk Manager 2'

'O - Corcomp Diagnostics'

'P - Navarrone Disk Fixer'

 

All of the other options either give a blue screen or fill the screen with random stuff. (Although it's random, it's consistent so I get the same random stuff every time.)

 

I think the 74LS378 is starting up in a random bank as that's how it behaves in the 512K board - would this cause the behaviour I'm seeing? As I said, I'm new to all this stuff so please excuse my ignorance!

 

Many thanks,

Rob