68k:Ports:600000 - Revision history

Jib at 03:20, 5 June 2006

2006-06-05T03:20:13Z

Jib at 03:13, 5 June 2006

2006-06-05T03:13:29Z

Jib at 03:00, 5 June 2006

2006-06-05T03:00:01Z

New page

[[Category:68k:Ports:By Address|600000]] [[Category:68k:Ports:By Name|Battery Voltage]]

{|
|-
| Bit 7 || Pin 100 output enable (keep =0)
|-
| Bit 6 || Pin 99 output enable (keep =0)
|-
| Bit 5 || Data to pin 100 (not used)
|-
| Bit 4 || Data to pin 99 (not used)
|-
| Bit 3 || Data from pin 100 (not used)
|-
| Bit 2 || Data from pin 99 (1 if batt. voltage is above trigger level (see [[68k:Ports:600018|600018]])
|-
| Bits 1-0 || not used
|}

@@ Line 1: / Line 1: @@
-[[Category:68k:Ports:By Address|600000]] [[Category:68k:Ports:By Name|Battery Voltage]]
+[[Category:68k:Ports:By Address|600000]] [[Category:68k:Ports:By Name|Battery Voltage / 92 LCD contrast]]
 This port controls I/O from pins 99 and 100 on the ASIC. It's used to check battery voltage on all calcs, and to control LCD contrast on the TI-92.
-{|
+* Bit 7: Pin 100 output enable (keep =0)
-|-
+* Bit 6: Pin 99 output enable (keep =0)
-| Bit 7 || Pin 100 output enable (keep =0)
+* Bit 5: Data to pin 100 (TI-92: used for LSB of LCD contrast)
-|-
+* Bit 4: Data to pin 99 (not used)
-| Bit 6 || Pin 99 output enable (keep =0)
+* Bit 3: Data from pin 100 (not used)
-|-
+* Bit 2: Data from pin 99 (1 if batt. voltage is above trigger level (see [[68k:Ports:600018|600018]])
-| Bit 5 || Data to pin 100 (TI-92: used for LSB of LCD contrast)
-|-
-| Bit 4 || Data to pin 99 (not used)
-|-
-| Bit 3 || Data from pin 100 (not used)
-|-
-| Bit 2 || Data from pin 99 (1 if batt. voltage is above trigger level (see [[68k:Ports:600018|600018]])
-|-
-| Bits 1-0 || not used
-|}