To do: Document the many revisional differences. There might be more text in the BIOSes too.

The Philips CD-i was an attempt by Philips to create a multi-purpose CD player that, in addition to being able to play regular CDs, had the ability to play video games and movies through special CDs. However, its $700 asking price, wildly inconsistent game quality, and lack of proper controller spelled certain doom for the CD-i.

OS-9 Copyright Text

At 0x4640 in BIOS 200 (0x4638 in BIOS 220b) is the copyright text for Microware's OS-9:

OS-9 V2.4.0 

Copyright (c) 1990 by Microware Systems Corp.

Debugging Text

At 0x1272 in BIOS 200 (0x126A in BIOS 220b) is the following text:

Assuming you are testing a boot loader, please enter it's entry address:



Bad data entered



Kernel 



NO OS-9 kernel found.

And starting at 0x1E19 (0x1E11 in BIOS 220b) is a whole bunch of text relating to testing the CD-i's board:

CD-I MONO BOARD low level test

REL. 1.2



------------------------------

--------



*** Low level test of CDI MONO board ended ***



Press any key to test receiver

Receiver o.k., you pressed:



Give a RAM address (max 6 digits) :

0. Exit Low level test

1. Writing to a default RAM address

2. ROM parity check

3. Nvram test

4. Dram test

5. Cdic test

6. Slave processor test

7. Clock Calibration

8. Attex test

9. X-bus test

Make your Selection:

0. Exit Attex menu

1. Generate full range VDSC-cs

2. Generate full range CDIC-cs

3. Generate full range Slave-cs

4. Generate full range NVRAM-cs

5. Generate KillME & DMAEN (toggle)

Make your Selection:



Done.

- CS from $000000 to $07FFFF...

- CS from $200000 to $27FFFF...

- CS from $300000 to $33FFFF...

- CS from $400000 to $47FFFF...

- CS from $300000 to $30FFFF...

- CS from $310000 to $317FFF...

- CS from $320000 to $33FFFF...

- CS from $318000 to $31FFFF...

ADDRESS DATA READ EXPECTED ERROR:

RETURN to continue, ESC to stop:



ERROR: Give startaddress:

ROM ID:

Release Number:

CheckSum:

Test DRAM bank 0 (Y/N) ?

Test DRAM bank 1 (Y/N) ?

Test full DRAM range (Y/N) ?



Filling DRAM BANK0

Read BANK0 and Compare

Filling DRAM BANK0 with inverted data

Read BANK0 and Compare



Filling DRAM BANK1

Read BANK1 and Compare

Filling DRAM BANK1 with inverted data

Read BANK1 and Compare



Filling FULL DRAM range (BANK 0 and BANK1)

Read FULL DRAM range and Compare

Filling FULL DRAM range with inverted data

Read FULL DRAM range and Compare



Read FULL DRAM, press ESC to stop

Write FULL DRAM, press ESC to stop

Write FULL DRAM (inverted), press ESC to stop



Reading DRAM0, press ESC to stop

Reading DRAM1, press ESC to stop

Writing DRAM0, press ESC to stop

Writing DRAM1, press ESC to stop

Writing DRAM0 (inverted), press ESC to stop

Writing DRAM1 (inverted), press ESC to stop

Testing CDIC Ram

Writing CDIC Ram, press ESC to stop

Writing CDIC Ram (inverted), press ESC to stop

Testing CDIC Ram with inverted data

Reading CDIC Ram, press ESC to stop

Contents of CDIC registers:

Write $F0 to the slave

Read byte from slave (should be $F0)

Release number SLAVE PROC

Release number CD PROC

Do the non-destructive NVRAM test (Y/N)?

Test NVRAM with ROM (destroys NVRAM contents) (Y/N)?

Testing NVRAM with ROM data

Testing NVRAM with inverted ROM data

Test NVRAM with address data (destroys contents) (Y/N)?

Testing NVRAM with address

Testing NVRAM with inverted address

Reading NVRAM, press ESC to stop

Writing NVRAM, press ESC to stop

Writing NVRAM (inverted), press ESC to stop

NVRAM test completed

Clock Calibration signal (512Hz) now on IC7205 pin 21

Measure this signal with : minimum gate time = 5 sec

PRESS A KEY TO CONTINUE



Please input the measured frequency (6 decimals):

The calibration byte is :



Check 512Hz signal again (Y/N) ?



**Unable to correct that much. A correction of 63 ppm is now installed **

Write Transparant command to CDIC

Read from Slave via Xbus and SPIbus

Received result (should be $A47A3B1C)

MPU incompatible with OS-9 kernel

Bad psuedo-vector table OS-9

Boot failed, can't find 'init'

WARNING - kernel has bad CRC

Can't allocate system tables

WARNING - IRQ stack too small, ignored

Can't allocate IRQ stack 

can't open console terminal

OS9P2 module aborted

Can't fork to initial process init

can't allocate system tables

Bad memory list in 'init' module