Random Reverse Engineering Notes

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(Undocumented PDC routines)
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| 0xa5

Revision as of 18:46, 3 May 2019

Memory Layout J5000

fffffff0f0400000 - Scratch RAM
fffffff0f0500000 - EEPROM (Stable Storage)
fffffff0f05d0000 - LCD
fffffff0f05e0000 - Debugger card
fffffff0f05f1010 - Microcontroller?
fffffff0fee00070 - SuperIO index
fffffff0fee00071 - SuperIO data
fffffff0f05f0068 - PDH (Processor dependent hardware register)

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 PDC_EEPROM
0x84 0x1b PDC_SEED_ERROR
0x87 0x1c PDC_IO
0x88 0x1d PDC_BROAD_RESET
0x8a 0x1e PDC_LAN_STATION_ID
0x8b 0x1f PDC_CHECK_RANGES
0x8f 0x21 PDC_SYSTEM_INFO
0x90 0x22 PDC_RDR
0x91 0x23 PDC_INTRIGUE
0x93 0x24 PDC_PCI
0xa3 0x20 PDC_INITIATOR
0xa5 0x25 PDC_LINK
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