58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
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AST RESEARCH TECHNICAL BULLETIN TB-0033A 9-4-84
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AST-5251 VER. 2.1 ADDRESSING
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The AST-5251 package utilizes I/O address 300 to 30F. If another
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peripheral board is using the same or part of this address range
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it will be necessary to readdress the AST-5251.
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To readdress AST-5251, the CC-432 board and AST5251.EXE must be
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reconfigured.
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Locate the switch bank (S1) on the CC-432 board. Switches one
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and two select the I/O address range for the CC-432.
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S1 Position Hexidecimal Application
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1 2 I/O Addresses
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ON ON 300-30F Prototype Card
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OFF ON 320-32F Fixed Disk
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ON OFF 340-34F Not Used
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OFF OFF 360-36F Not Used
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To patch AST5251.EXE it is first necessary to rename it in order
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for DEBUG.COM to edit it. Type in the commands in boldface on a
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disk that has DOS, DEBUG.COM, and AST5251.EXE on it.
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A>REN AST5251.EXE AST5251.TST
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A>
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A>DEBUG AST5251.TST
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-e300 (sp = spacebar)
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sp sp sp sp sp sp sp
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08FF:0300 0A. 04. 02.XX 03. 00.YY 03. 00.ZZ 03.
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sp
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08FF:0308 04. DD
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-w
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Writing A000 bytes
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-q
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A>
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A>REN AST5251.TST AST5251.EXE
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A>
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(*) Where XX, YY, ZZ, and DD equal the values in table 2-1,
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corresponding to the selected address (see below).
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TABLE 2-1
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I/O ADDRESS XX YY ZZ DD
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300-30F 02 00 03 04
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320-32F 22 20 23 24
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340-34F 42 40 43 44
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360-36F 62 60 63 64
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