[REQUEST] CD-ROM speed

Discussion of development and patch submission.
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omarsis81
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[REQUEST] CD-ROM speed

Post by omarsis81 » Wed 07 Mar, 2018 4:06 pm

Dear Sarah: I noticed you have been working with the CD-ROM lately, I take the opportunity to make a small request.
Maybe you don't find it useful, but I'd appreciate if one's could select the speed of the CD-ROM reader: some selectable speeds like 1x, 2x, 4x, 8x, 16x and MAX, to compare and feel how long it took to load back in the day. Thanks

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xXLuckyXx
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Re: [REQUEST] CD-ROM speed

Post by xXLuckyXx » Wed 07 Mar, 2018 6:27 pm

Great idea.

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leilei
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Re: [REQUEST] CD-ROM speed

Post by leilei » Wed 07 Mar, 2018 7:39 pm

A slower CD-ROM speed would probably benefit......certain games' installers that give out game lore by sound as the installer goes. Activision titles come to mind (Interstate '76, Battlezone, etc)
omarsis81 wrote:
Wed 07 Mar, 2018 4:06 pm
some selectable speeds like 1x, 2x, 4x, 8x, 16x and MAX
It doesn't have to stop at 16x. We could go all the way to 56x :)

Solarstrike
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Re: [REQUEST] CD-ROM speed

Post by Solarstrike » Thu 08 Mar, 2018 4:38 am

leilei wrote:
Wed 07 Mar, 2018 7:39 pm
It doesn't have to stop at 16x. We could go all the way to 56x :)
Maybe even those obscure 72x drives :mrgreen:

tk421
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Re: [REQUEST] CD-ROM speed

Post by tk421 » Sat 10 Mar, 2018 9:29 pm

I was quite fond of my 16x CD-ROM drive back in the day. When I upgraded to the 52x drive I never looked back. Even today with my fancy DVD burner with lightscribe technology, I never regretted the upgrade as my CDs run so quickly and smoothly.

This would be a nifty feature. We can relive the glory days when CD-ROM drives were novelties.

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leilei
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Re: [REQUEST] CD-ROM speed

Post by leilei » Sun 11 Mar, 2018 9:47 am

The appropriate whirring noises would also have to be emulated. Don't know if there can be an organized effort to sample the hardware we have for sound, like getting a drive to record a cd/diskette being copied and going through the insert/eject cycle etc.

szadycbr
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Re: [REQUEST] CD-ROM speed

Post by szadycbr » Sun 11 Mar, 2018 11:07 am

UAE has quite interesting sounds of floppy disk drive, it is very well done , and it feel nice to.

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SarahWalker
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Re: [REQUEST] CD-ROM speed

Post by SarahWalker » Sat 17 Mar, 2018 11:41 am

I've committed a rough implementation of this to rev 1110. Seek times are a very rough model, transfer time is impacted by the existing ATAPI & SCSI emulation, but performance should be roughly correct, particularly for the lower speed drives.

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omarsis81
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Re: [REQUEST] CD-ROM speed

Post by omarsis81 » Sat 17 Mar, 2018 6:33 pm

SarahWalker wrote:
Sat 17 Mar, 2018 11:41 am
I've committed a rough implementation of this to rev 1110. Seek times are a very rough model, transfer time is impacted by the existing ATAPI & SCSI emulation, but performance should be roughly correct, particularly for the lower speed drives.
Thank you, thank you, thank you! However I will only will be able to test it in the next release of PCem. I saw that leilei tested it and show very close results

ecksemmess
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Re: [REQUEST] CD-ROM speed

Post by ecksemmess » Sun 18 Mar, 2018 7:32 am

Awesome idea, thanks for adding this! I see that 56x is missing from the list of available speeds--any particular reason for that? I realize that the accuracy is iffy toward the higher end of the speed range in this implementation, but just about every other common speed now seems to be accounted for and it would round out the list quite nicely to have 56x in there.

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SarahWalker
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Re: [REQUEST] CD-ROM speed

Post by SarahWalker » Tue 20 Mar, 2018 5:50 pm

Added in rev 1115.

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