Thank you all. It's a good thing I asked.

I have a SYM-1. It has a feature where it can draw text on an oscilloscope, and I'm trying to get it to work. I'm using the sample code from the manual, and I think it's buggy. But since I'm not experienced in 6502 programming, I was hoping someone could double check me.

I've attached a snapshot of ...

I'm not using any chip yet. I trying to understand what I need to buy.

- Bob

The 1981 manual shows the correct jumpers for an 8K ROM in U21. The 1978 manual shows the correct jumpers for two 4K ROMs in U21 and U22

Then I'm not understanding something. The 1981 BASIC manual wants jumpers B-1, C-1, F-2, G-2, K-12, and L-13 or 14. On page 4-30 of the SYM-1 manual, B-1 and F ...

The manual talks about a single ROM, 02-0058A, and has you configure the jumpers for 4K. Is the manual just plain wrong?

- Bob

Hi,

I'm confused about how to set up SYM-1 BASIC. At the SYM-1 page (http://www.6502.org/trainers/synertek/) there's a 4K ROM with BASIC at $C000, another at $D000, and an 8K ROM for $C000-DFFF.

So is it an 8K BASIC that can be installed as one 8K ROM or two 4K ROMs? Or is it a position ...