Changes
Notes: The "Centronics" board is yet another [[8bit Printer Ports|8bit Printer Port]] solution (but different than the [[CPCI 8bit Printer Mod|joystick-signal based one]] that was released a few months earlier in the same magazine). The Real Time Clock is somewhat similar to the [[Real Time Clock|CPCI Real Time Clock]] released in a special issue of the same magazine, but not identical (the RTC chip has different pin-outs, and some of it's 4bit registers are working slightly different, the leap-year bits, for example).
Databoxes: '''UHR8000''' RTC-RAM-driver with Hisoft Devpac source code in 10-1986(hex listing, plus Hisoft Devpac source code) (caution this version uses incorrect I/O addresses FBE1-FBE3), '''UHRC000X''' RTC-ROM-driver in 4-1987(this version uses correct I/O addresses FBE2-FBE4). Uni-PIO examples in 12-1986 (=only a few basic lines). There seem to be no Centronics and V/24 drivers included in databoxes.
== I/O Ports ==
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|F9EFh || F9EBh || Schneiderware V/24 8253 Timer Control<br>Note: Timer clock input is jumper select-able: 2MHz (default), or 1MHz
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|FBE2h || BUGGED:FBE1h || Schneiderware RTC index/control (W)
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|FBE3h || BUGGED:FBE2h || Schneiderware RTC data 4bit (W)
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|FBE4h || BUGGED:FBE3h || Schneiderware RTC data 4bit (R)
|-
|}
