Random Reverse Engineering Notes

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(Undocumented PDC routines)
Line 3: Line 3:
 
  fffffff0f0400000 - unknown, assumed EEPROM, but content different than what eepromread returns
 
  fffffff0f0400000 - unknown, assumed EEPROM, but content different than what eepromread returns
 
  fffffff0f05d0000 - LCD
 
  fffffff0f05d0000 - LCD
 +
fffffff0f05f1010 - Microcontroller?
  
 
== PDC PAGE0 processor specific ==
 
== PDC PAGE0 processor specific ==

Revision as of 09:40, 3 May 2019

Memory Layout J5000

fffffff0f0400000 - unknown, assumed EEPROM, but content different than what eepromread returns
fffffff0f05d0000 - LCD
fffffff0f05f1010 - Microcontroller?

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

ARG0 ROM internal index 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
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