I found this. Run from BASIC using whichever DOS you have... X=PEEK(978) Determines where DOS is - if less than 157 then DOS is below normal location - computer has less than 48K memory; if 157 then DOS is at its normal 48K location; if 190 then DOS is ProDOS, not DOS 3.3; if greater than 190 then DOS is in the language card. Another source says this PEEK can show memory size if used as: PRINT (PEEK(978)+35)/4;"K" Bill On Wed, Feb 23, 2022 at 8:06 AM Bob Shuster via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:

Thanks all for the input! I’ll assume this is indeed a 16K expansion board, but a generic card not from a major manufacturer. It’s in a 48K Apple ][ Plus. Is there a command to report the amount of RAM on an Apple II? I recall on the TRS-80 it was simply PRINT MEM.

Bob Shuster