More about the SYM-1 and SYM-2 on the Synertek pages
Sources of SYM-1 and SYM-2 Monitor ROMs
Many years ago Paul R.Santa-Maria (who sadly left us in 2012) gave me the listing of the source of the Monitor ROM in the SYM-1 1.1
Delivered as a listing, with the comments from the listing in the SYM-1 Reference manual and formatted close to the printed listing.
This is the heading of the listing:
SYM-1 SUPERMON AND AUDIO CASSETTE INTERFACE SOURCES
COMBINED AND CONVERTED TO TELEMARK ASSEMBLER (TASM) V3.1
0002 0000 ;
0003 0000 ;*****
0004 0000 ;***** COPYRIGHT 1979 SYNERTEK SYSTEMS CORPORATION
0005 0000 ;***** VERSION 2 4/13/79 “SY1.1”
Since the ROM of the SYM-1 1.0, 1.1 and the ROM of the SYM-2 2.0 are available:
- Converted the listing back to source format (TASM32, standard MOS format).
- Created separate source for the SYM-1 1.0 ROM, the SYM-1 1.1 ROM (the original listing) and the SYM-2 ROM.
- Typed in the audio cassette interface sources from the 1.0 reference manual.
- Changed the SYM-2 source to the different hardware (a 6532 at AC00 instead of a VIA) and other (minor) changes.
- Binary output compared to the original ROM dumps as proof the sources match the dumps.
In this archive sources of 1.0, 1.1, 2.0 listings, binary output.