IBM 2289 Personal Computer User Manual


 
Address (hex) Description Bits Byte pointer
00C4 Channel 5, memory address register 00 15 Yes
00C6 Channel 5, transfer count register 00 15 Yes
00C8 Channel 6, memory address register 00 15 Yes
00CA Channel 6, transfer count register 00 15 Yes
00CC Channel 7, memory address register 00 15 Yes
00CE Channel 7, transfer count register 00 15 Yes
00D0 Channels 4–7, read status/write command register 00 07
00D2 Channels 4–7, write request register 00 02
00D4 Channels 4–7, write single mask register bit 00 02
00D6 Channels 4–7, mode register (write) 00 07
00D8 Channels 4–7, clear byte pointer (write) N/A
00DA Channels 4–7, master clear (write)/temp (read) 00 07
00DC Channels 4–7, clear mask register (write) 00 03
00DE Channels 4–7, write all mask register bits 00 03
00DF Channels 5–7, 8- or 16-bit mode select 00 07
40 User Guide