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AST RESEARCH TECHNICAL BULLETIN TB-0052A 11-8-84 CLOCK/CALENDAR I/O ADDRESSING This Technical Bulletin contains information about the AST clock addressing. The information supplied is to aid one in avoiding and recognizing address conflicts within a PC. The products listed below contain an AST clock. Note the two different address ranges. The address range 2C0 thru 2C7 will operate in the IBM 3270 as well as in the IBM PC1, PC2, and XT. The address range 2C0 thru 2DF will not operate in an IBM 3270. PRODUCT I/O ADDRESS RANGE ** SIXPAKPLUS - P/N 03-01177-01 2C0-2DF DISKPLUS 2C0-2DF COMBOPLUS 2C0-2DF MEGAPLUS 2C0-2DF I/O PLUS 2C0-2DF MONOGRAPHPLUS * 2C0-2C7 MP II * 2C0-2C7 ** SIXPAKPLUS - P/N 201177 * 2C0-2C7 * Compatible with the 3270 PC.