Product flyer from Research Service Labs of Oklahoma City, mailed in response to a Radio-Electronics reader inquiry (per the attached mailing label, dated 11/01/84). Cover letter from David A. Schultz, Marketing, introduces a hardware/software line built around expandability: user-selectable addressing and on-board regulation across all boards. Hardware includes an EPROMMER ($75), a Centronics printer interface (PRTIF, $50), a bus buffer (BUF2, $75), and a four-drive 5.25″ disk interface (DISKIF, $200). Software includes a Z80 assembler/disassembler using F.G. Duncan’s functional notation (ASM/DSM, $40) and a 64-column text editor for the TS2068 (TEXTEDIT, $40), plus a cable line and a “coming soon” list — RS232, a proportional joystick interface, a light pen, RAM disk, a graphics language, and even a 6502 emulator.
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