IBM System/23 Datamaster: Difference between revisions
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| 4Fh || 8255#3 || 8255#3 control port
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=== Interrupts ===
Interrupts in the Datamaster are mostly handled by the 8259 PIC. However, the extra interrupts added by the 8085 are handled directly by the CPU.
{| class="wikitable"
! Interrupt !! Function
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| TRAP || Unknown
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| RST7.5 || PIT timer 2
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| RST6.5 || Unknown
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| RST5.5 || 8275 IRQ (if J1 is bridged)
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| IRQ || 8259 PIC
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