2 replies to this topic

[Esc]

I upgraded a 600XL to 64K, and got that working ok. I decided to clean the keyboard a bit and I made the mistake of disassembling the function keys from the keyboard. Now I managed to get them back on and they seem to work (it was a real pain to get that back and working) but now the LED doesn't work anymore. If I mess with it , one of the keys won't work (usually RESET, or START) (and its not a dead LED because I did get it to work before)

is there any trick to this, or should I just leave it as is? Seriously, I must have spent maybe 2-3 hours total time fooling around until I got all the function keys to work properly.

another question -- should the blocks in the memory test go to 40 with the 64K memory upgrade ? I know that only 37,xxx bytes are so are available when you do a ? FRE(0) in BASIC but I can't remember if the memory test actually displayed 40 blocks or 64 blocks?

[Nukey Shay]

On a 64k system, you should see 40 blocks tested in the Ram area IF Basic is enabled. Without Basic, you should see 48 blocks (the remaining 16 blocks covered by the Rom used by the OS and hardware). Only 37k is available to the Basic user because .5k is used for zeropage and the stack, 1.25k is used by the screen memory and display list (in the GR.0 editor), and 1k is used by the additional ram needed by the Basic cartridge (for floating point routines and such)...and page 6 ($0600-$06FF) is untouched by the computer. If you have Dos booted up, this would eat up an additional 5k (available Ram just under 32k).

[Esc]

Thanks, makes sense. I'm sure I booted with BASIC, because the OPTION or HELP key wasn't working at the time :-)