Data I/O 326-0324-029 3900 Program Algorithm Set 4 & 5 V5.90 Floppy Software

Data I/O 326-0324-029 3900 Program Algorithm Set 6, 7, 8 V5.90 Floppy Software

Data I/O 326-0324-029 3900 Program Boot/Files Alg. Set 1 V5.90 Floppy Software

Data I/O 3900 Programming System User Manual

Data I/O 326-0324-023 3900 Programming System ALG Set 2, Disk 1/3 Software

Data I/O 326-0324-024 3900 Prog. System Disk 1 of 3 ALG Set 2 Software

Data I/O 326-0324-034 3900/3980 Prog. System (ALG Sets 2, 3) Disk 2 of 5

Data I/O 326-0487-015 3980/3900 Program Device List V5.90 Family/Pinout Software