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⬅️ Previous capture (2023-06-16)

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AST RESEARCH, INC.         TECHNICAL BULLETIN #0614                  03-02-90

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                PREVIEW I/O PARALLEL PORT ADDRESS CORRECTIONS


The Preview I/O Manual (000437-001) states that jumper E9 should be used to
set the board to LPT3 (I/O address 278h with another parallel port set at
3BCh).  The E9 jumper is actually I/O address 378h (LPT1 or LPT2) and E10 is
I/O address 278h (LPT2 or LPT3).  The affected pages are 2-10 and A-5.

                           DEBUG WITH E8 JUMPERED
C:\>debug
-d0:400
0000:0400  00 00 00 00 00 00 00 00-BC 03 00 00 00 00 00 00
                                   -----
0000:0410  31 42 FF 80 02 00 00 00-00 00 32 00 32 00 75 16
0000:0420  67 22 0D 1C 64 20 30 0B-3A 27 34 05 30 0B 30 0B
0000:0430  0D 1C 6C 26 73 1F 0D 1C-64 20 65 12 62 30 00 00
0000:0440  77 00 C0 00 00 00 00 00-00 07 50 00 00 40 00 00
0000:0450  00 0B 00 00 00 00 00 00-00 00 00 00 00 00 00 00
0000:0460  0C 0B 00 B4 03 29 20 08-04 7E 0C 00 30 A8 09 00
0000:0470  00 00 00 00 00 01 00 00-14 14 14 14 01 01 01 01

                           DEBUG WITH E9 JUMPERED
C:\>debug
-d0:400
0000:0400  00 00 00 00 00 00 00 00-78 03 00 00 00 00 00 00
                                   -----
0000:0410  31 42 FF 80 02 00 00 00-00 00 32 00 32 00 75 16
0000:0420  67 22 0D 1C 64 20 30 0B-3A 27 34 05 30 0B 30 0B
0000:0430  0D 1C 6C 26 73 1F 0D 1C-64 20 65 12 62 30 00 00
0000:0440  77 00 C0 00 00 00 00 00-00 07 50 00 00 40 00 00
0000:0450  00 0B 00 00 00 00 00 00-00 00 00 00 00 00 00 00
0000:0460  0C 0B 00 B4 03 29 20 08-04 7E 0C 00 30 A8 09 00
0000:0470  00 00 00 00 00 01 00 00-14 14 14 14 01 01 01 01

                           DEBUG WITH E10 JUMPERED
C:\>debug
-d0:400
0000:0400  00 00 00 00 00 00 00 00-78 02 00 00 00 00 00 00
                                   -----
0000:0410  31 42 FF 80 02 00 00 00-00 00 32 00 32 00 75 16
0000:0420  67 22 0D 1C 64 20 30 0B-3A 27 34 05 30 0B 30 0B
0000:0430  0D 1C 6C 26 73 1F 0D 1C-64 20 65 12 62 30 00 00
0000:0440  77 00 C0 00 00 00 00 00-00 07 50 00 00 40 00 00
0000:0450  00 0B 00 00 00 00 00 00-00 00 00 00 00 00 00 00
0000:0460  0C 0B 00 B4 03 29 20 08-04 7E 0C 00 30 A8 09 00
0000:0470  00 00 00 00 00 01 00 00-14 14 14 14 01 01 01 01