2001/5/5
Worked on PCM sound generation. Fixed some bugs in it.
2001/4/29
Major clean up to the FIO CD interface code.
2001/4/27
Worked on a SCSI status/error message reporting routine. Browsed through
SCSI spec. Using a different SCSI command, I got the CD-DA playing to work.
Read about some of the other interface commands (pause, unpause, stop, close
tray, open tray) and implemented them.
2001/4/17
Connected the SCD_CDD module to the FIO CD interface functions.
2001/4/9
Worked on SCSI interface box a bit more. Implemented MCI interface as a work
around for my SCSI problems. Can now play CD-DA, stop, pause, unpause, load
tray, and open tray.
2001/4/4
Fixed the warping problem in rotate/scale graphics. Fixed a misconception
of mine about the "fullscreen" graphics memory region. Added access messages
for it to the EMV.
2001/3/28
Finished implementing rotate/scale graphics and fixed some visual glitches
in it.
2001/3/22
Did some reverse engineering on the BIOS music playback code and finally
fixed the bug. Implemented the rotate/scale graphics. It is very buggy
though.
2001/3/17
Finally found some free time to do some serious compatiblity testing.
I've discovered that I need to now implement font graphics, and rotate/scale
graphics to get any further. I've also discovered a reoccuring glitch in the
simulated CDDA playback that needs fixing.
2001/3/7
Read through part of the SCSI book, and began writing a user-interactive SCSI
command interface. Implemented internal battery RAM. Fixed a CDC bug. Lots
of games are now showing signs of life.
2001/3/1
Did some serious game testing today. Only 1 shows signs of life. It is
called "Lunar the Silver Star."
2001/2/21
Did a bunch of reverse engineering to attempt to discover why my CDC code is
not allowing the BIOS to progress beyond its current wall. Implemented
what I think are the "correct" states of the CDC status bits. The BIOS can
now get to the point of saying "press start." Pressing start will take me
to a license/boot-up screen. No games seem to be showing signs of life.
2001/2/16
Implemented everything I have learned. Fixed some bugs.
2001/2/11
Figured out the CPU read and DMA transfer methods for the CDC.
2001/2/8
Implemented and debugged the time-sensitive elements of the PCM register set.
Found a bug in my timer3 code.
2001/2/4
Read about the PCM sound chip. I need to get this simulated soon as it will
hold me up if I don't.
2001/2/2
Implemented what I know about CDC.
2001/1/28
Experimenting with SCSI. Can now get short sector reads to work.
2001/1/23
Figured out most of the CDC.
2001/1/18
Examined CDCx BIOS functions. Got a PDF for the CDC chip but it isn't
helpful.
2001/1/15
Figured out a few more subcommands for READTOC command, and implemented them.
2001/1/11
Implemented everything I've learned so far.
2001/1/10
Figure out some more CDD return status.
2001/1/7
Figured out some CDD return status info.
2001/1/5
Figured out more CDD commands.
2001/1/4
Searched for code in BIOS that calls the user-callable BIOS functions and
left markers. Learned some more CDD basic commands.
2001/1/2
Examined DRVINIT routine. Learned more about CDD. Implemented some of what
I learned.
2000/12/28
Found hardware origin of abstime, reltime, and current track. Learned some
basic stuff about the CDD.
2000/12/22
Examined CDBSTAT function, tracked down origins of the status data.
2000/12/20
Began commenting the disassembly of the user-callable functions in the BIOS
and marked their entry points.
2000/12/2
Added default CD-ROM drive selection to GUI and .INI.
2000/11/30
Learned how to use DLLs. Added ASPI framework.
2000/11/29
Downloaded some source code to a playstation simulator to look at the CD-ROM
code. I have reason to believe that the CD-ROM drives are both made by Sony
and made about the same time.
2000/11/27
Played around with emulator a little bit. Didn't really accomplish anything.
Did some more reverse engineering work.
2000/11/23
Added register viewer for SCD SYS regs. Did some more reverse engineering to
learn basics of SCD CDD and SCD CDC. Added basic framework for SCD
CDC and SCD CDD. Implemented basic command and response framework for SCD
CDD.
2000/11/16
Implemented 2M mode word RAM access in SCD M68 MMU and GEN M68 MMU. Did some
more reverse engineering. Implemented read/write routines for remaining SCD
registers in SCD M68 MMU. Implemented interrupt 4, and interrupt 1. Added
SCD STMP viewer.
2000/11/9
Did some reverse engineering. Added basic read/write support for some SCD
system regs to SCD M68 MMU. Implemented SCD comm cmd, and SCD comm sts in
MMUs. Added SCD comm cmd and SCD comm sts access messages to MMUs and EMV.
2000/11/5
Did some reverse engineering.
2000/11/2
Connected up SCD M68 emu internally. Added framework for SCD system regs
access to SCD M68 MMU. SCD BIOS screen now displays.
2000/10/31
Added SCD register access messages for GEN M68 MMU and SCD M68 MMU to
EMV. Added basic read/write support for SCD system regs to GEN M68 MMU.
Reconditioned GEN M68 PC fixup routines for use with CD-mode memory map.
2000/10/26
Added framework for SCD registers to GEN M68 MMU. Implemented SCD M68 MMU
framework. Also did some reverse engineering.
2000/10/12
Partially implemented SCD M68 CPU; it is not internally connected
yet. Disassemled BIOS into a txt file to edit and reverse engineer with, and
then did a bunch of reverse engineering with it.