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Shareware Supreme Volume 6 #1
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swsii.zip
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swsii
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186
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TANDY.ZIP
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TANDY.TXT
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1988-12-25
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48 lines
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Compliments of
The P e r S t o r S u p p o r t B o a r d
FidoNet 1:102/523
AlterNet 7:401/523
TANDY XT COMPATIBLE COMPUTERS
The Tandy 1000 and 1000SX require modifications prior to
installation of the PS180-8XT Controller. Unlike IBM XTs and
compatibles, which use IRQ5 for the hard disk controller
interrupt, the Tandy computers use IRQ2 for the hard disk
controller and IRQ5 as an optional bus interrupt.
The IRQ5 interrupt line must be disabled to use the PS180-
8XT. The Tandy 1000SX has a 4 position dip switch. Position 2
of dip switch S2, if set in the OFF position, will disable IRQ5.
The Tandy 1000 may or may not have this dip switch. If not, you
must bend pin 13 of the 8259 interrupt control chip so that it is
out of the socket. Be careful that you do not break or remove
this pin from the chip, however. In addition, modifications must
be made to the PS180-8XT Controller. Call your dealer for further
details.
TANDY AT COMPATIBLE COMPUTERS
The Tandy 286 computers require no modifications prior to
installation of the PS180-8AT Controller. However, only the AT9-
1.03 BIOS has been tested with the Tandy 3000 and 4000 computer
systems. Newer BIOS revisions have not been tested with these
computers.