Changes
/* I/O Ports */
|F9EFh || F9EBh || Schneiderware V/24 8253 Timer Control<br>Note: Timer clock input is jumper select-able: 2MHz (default), or 1MHz
|-
|FAE0h || N/A || Schneiderware Analog Board ADC 0848 A/D Converter (R/W)<br>Read: Get 8bit data from selected channel<br>Write: Select channel & mode; bit0..2=channel (0..7), bit3..4=mode<br>Read: get 8bit data from selected channel, bit5-7=unused<br>
* Mode 0 (or 1) - Differential: Plus=Channel(N), Minus=Channel(N XOR 1)
* Mode 2 - Single-Ended: Plus=Channel(N) and Minus=AGND
