View source for Random Reverse Engineering Notes

== Memory Layout J5000 ==

 fffffff0f0400000 - unknown
 fffffff0f0500000 - EEPROM (Stable Storage)
 fffffff0f05d0000 - LCD
 fffffff0f05f1010 - Microcontroller?
 fffffff0fee00070 - (RTC?) index
 fffffff0fee00071 - (RTC?) data

== PDC PAGE0 processor specific ==

 0x640: code that will be executed when PDC_PROC(0) is called, loop with nops:
   0x00000640  e81f1ff5  08000240  08000240  08000240
   0x00000650  08000240  08000240  08000240  08000240
   0x00000660  08000240  08000240  08000240  08000240
   0x00000670  08000240  08000240  08000240  08000240

 0x680: OS rendezvous code

== Undocumented PDC routines ==

{| class="wikitable"
|-
! scope="col" | ARG0
! scope="col" | ROM internal index
! scope="col" | Name
|-
| 0x81
| 0x1a
| EEPROM read/write
|-
| 0x84
| 0x1b
|
|-
| 0x87
| 0x1c
|
|-
| 0x88
| 0x1d
|
|-
| 0x8a
| 0x1e
|
|-
| 0x8b
| 0x1f
|
|-
| 0x8f
| 0x21
|
|-
| 0x90
| 0x22
|
|-
| 0x91
| 0x23
|
|-
| 0x93
| 0x24
|
|-
| 0xa3
| 0x20
|
|
|-
| 0xa5
| 0x25
|
|}