GSA Protocol Driving New Innovative Gaming Products of Today and Tomorrow. GAME TO SYSTEM (G2S) VERSUS SLOT ACCOUNTING SYSTEM (SAS). Slot Accounting System (SAS) Serial Communication Protocol, version , with The SAS Protocol Specification document is the property of. . SAS is a serial protocol with RS or in some cases TTL levels. My boss wants that the machine isn't playable if the player card isn't inserted. SAS (Slot Accounting System) is. I have a Python script that communicates with the slot machine; I would like to know how Python does this and how to transfer it to Perl. 08/ proprietary SAS based slot machines. SAS protocol consists of 3 layers of physical layer, link layer, and application layer. Download the article here. SAS protocol consists of 3 layers of physical layer, link layer, and application layer. The physical layer leverages RS at kbps of 1 start bit, 8 data. 40ms when EGM support RTE (real time event) mode. Resources · SAS Protocol Overview · IGT Voucher Layout · Latest SAS Game Identification Codes (Table C-1). HOME. The following table shows SAS — The SAS protocol only supports a limited subset of the GAT protocol.