A search in the list archive for "opt2s.asm" will get you a post where a program to dump the option rom contents out the serial port was posted by Stephen Adolph in Oct 2015. With that dump in hand we can then search for strings, compare it to other images, etc.
Willard Sent from Samsung tablet -------- Original message -------- From "John R. Hogerhuis" <[email protected]> Date: 03/12/2017 9:13 PM (GMT-07:00) To Model 100 Discussion <[email protected]> Subject Re: [M100] Mystery Rom in Option Rom slot On Sun, Mar 12, 2017 at 7:49 PM, hargarg trurthsr <[email protected]> wrote: Thanks for your suggestion. I tried print(chr$(i)) from i - 0 to 65535 and all I see is the usual microsoft stuff and BASIC commands in standard ROM and the screen menu items. Doesn't the option ROM reside at the same memory address as the standard ROM and can only be accessed by memory switching ? Yes. So a simple PEEK loop in BASIC won't work. Found this online, might work, but you need to modify it to run in a loop (it only peeks one byte) 1 REM --- PEEK OPTION SOCKET --- 100 FOR X=0 TO 13 110 READ D 120 POKE 65351+X,D 130 NEXT X 200 INPUT HL 210 CALL 65351,0,HL 220 PRINT PEEK(63360) 1000 DATA 243,62,1,211,232,126,50,128,247,175,211,232,251,201 https://groups.google.com/forum/#!topic/comp.sys.tandy/jI1HjKOEPAY
