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Now downloading free:HP 98638A DIO 8 Port Async Mux IMS Feb90

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98638A DIO 8 Port Async Mux IMS Feb90

Original Chassis:98638A DIO 8 Port Async Mux IMS Feb90
Descr: HP 9000_dio 98638A_DIO_8_Port_Async_Mux_IMS_Feb90.pdf
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98638A_DIO_8_Port_Async_Mux_IMS_Feb90.pdf 1)10 98638A a-PORT MUX BEBOP/CONCERTO INTERNAL MAINTENANCE SPECIFICATIONS February 1990 HEWLETT PACKARD GRENOBLE NETWORKS DIVISION HP confidential 1 HP confidential 2 REVISION HISTORY BUG FIX MAY -1988 by Sylvie MOULIN Due to a design "feature ,of the eTe chip,' a' spurious interrupt ll is generated When Z80performs a write to the chip to enable interrupts and when ,own-~unter reaches zero value "at 'the same time. 4 . The fix affects CTC initialization for SIO/PIO loopback test in MX4sT. Only the first two lines of each CTC are used as baud rate generator. So the initialization is restricted to these four lines. CHANGES : in MX4sT see labels MSIO 20 and MSIO 30 lo

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