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- Any port in a storm . . . Courtesy of Dr. Bob
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- Port# (in hex) Function
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- 40-43 control of programmable timer
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- 60 passing scan codes from the keyboard
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- 61 controls speaker (bits 0 and 1), cassette motor,
- and hardware timer
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- 3b0 - ? Mono display
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- 3d0 - ? Color display
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- 3f0 - ? Diskette controller (actual data to and from diskette
- goes through 3f5)
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- 3f8 - 3ff com1: (modem attachment on PCjr) _
- 3fb line control register |
- 3fc modem control register |___com1:
- 3fd line status register |
- 3fe modem status register _|
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- 2f8 - 2ff com2: (RS232 on PCjr)
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- 2fb line control register |
- 2fc modem control register |___com2:
- 2fd line status register |
- 2fe modem status register _|
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- 200 - 207 game port?
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