8BIT wrote:
Can you provide a link to the SBC OS you are looking at? My SBC2OS uses page 3 for the keyboard input buffer and a few system pointers.
I'm using the copy I got from Rich Cini for his 2.7 respin of the SBC. Here's a link:
http://cini.classiccmp.org/my6502/6502s ... 40_src.zipRich took your SBC and added an onboard AVR video and an IEC port interfaced to the existing VIA's. It might be related to buffer space for one or the other, or maybe neither. But I can't figure it out.
Update: In basic23.asm I found a line indicated page 2 is being used for buffer space. So it looks like something for EH Basic.