 The club's president told Baker that DEC would be giving them a Rainbow 100 computer on indefinite loan, so he made plans to move the CBBS onto this machine.The Rainbow contained two processors, an Intel 8088 and a Zilog Z80, allowing it to run both MS-DOS and CP/M, with the BBS running on the latter.When the machine arrived, they learned that the Z80 side had no access to the I/O ports, so CBBS could not communicate with a modem.