About the Datalink

	What is it?
	Download Protocol
	Display Segments
	Memory Map
	150 vs 150s
	EEProms

Wristapp Programming
Reference

Creating Wristapps

Wristapp Format

The State Table

Wristapp Routines

Wristapps

Wristapp Programming
Tutorials

1 - Hello World

2 - Getting Input

3 - Better Input

4 - Showing Selection

5 - PassWord

6 - Day Find

7 - Playing with Sound

8 - Using Callbacks

9 - Hex Dump

10 - EEPROM Dumper

11 - Spend Watch

12 - Sound Schemes

13 - Random Numbers

14 - Hourly Chimes

15 - Lottery Picker

Sound Schemes

Sound Hardware

Sound Scheme Format

Home Send Mail

Memory Map

The Datalink is controlled by a custom 6805 which has 16K of ROM, 1.25K of Ram and 2.0K of EEProm. Because the 6805 has a 15 bit address bus, all accesses wrap at 0800 to 0000 and repeat once again. The EEProm is a serial device and does not appear in the accessible address space for the 6805.

Datalink Overview Memory Map
0000-002A 6805 Hardware registers

002B-004F Unused ram (probably not even mapped)

0050-005F System App local variables

0060-0067 Wristapp local variables

0068-00C2 System local variables

00C3-00FF Call stack

0100-010F EEProm control variables

0110-0335 Wristapp memory

0336-0435 Sound memory (starts high, low end can be used for a larger wristapp)

0436-04FF System upper ram

0500-3FFF Unused - This is a hole in the address space

0400-7FFF System ROM