Dinosaur (1990)(Falcom) - Seems to have issue with disk scenario 1 on certain behavior

[wwark]

If I set only "Dinosaur (Program disk)" on Drive 1:
After selecting "Start the game"
I have this message

After inserted Dinosaur (Scenario disk 1) and click of space key. It doesn't go in game but still print this message.

If I reset on the OSD with both disks still inserted and "Start the game", I can go in game.

Thanks!

[yosinda]

This is a common issue with Falcom games.
If no disk is inserted in drive 2 when booting, drive 2 seems to be excluded from processing.

For example, if you boot with only "Disk A" on Ys and select "Disk Load"(press F1), you will be prompted to insert the user disk into drive 1.
On the other hand, if you boot with a "User disk" inserted in drive 2, you will be prompted to insert it in drive 2.

I suspect that this is because the Falcom disk driver checks the ready signal of floppy disk drives and counts the number of floppy disk drives installed.

In Puu-san's implementation of the floppy disk drive, the ready signal is not asserted unless a disk is inserted.
If you try clipping the ready signal, this problem will not occur. However, this has a side effect.

[wwark]

Thank you for the explanation !