Topic: New computers added . . .  (Read 7226 times)

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Offline AndyRCM

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Re: New computers added . . .
« Reply #15 on: July 12, 2008, 03:32:59 PM »
Shockwave,
sounds like a good idea - more work though!!! Sorry!

Drew
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Offline Zetr0

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Re: New computers added . . .
« Reply #16 on: July 12, 2008, 07:01:06 PM »
@Andy

I took the liberty and done some research on the Sega Megadrive / Genesis - Mega CD and the 32x

heres my findings

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

Sega Genesis/Megadrive

CPU:
16-bit Motorolla 68000 (7.61MHz) *depends on Regeon*
Co-processor: Z80 Zilog (4MHz)

Memory:
1MB (8mbit) ROM Area
64KB RAM
8KB Audio Ram
64KB VRAM (dedicated Video RAM)
64*9 Bits of CRAM (Colour RAM)

Graphics: Dedicated graphics processor
Colors: 512 (64 on screen)
Sprites: 80
Resolution: 320x224 pixels


Sound:
6 channel stereo.
comprises of two sound processors
TI 76489 PSG, (Programmable Sound Generator)
Yamaha YM 2612 FM (Synthesis)

Signal to noise Ratio: 14dB

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

Mega CD (source Sega CD1 Users Manual)

CPU: Motorola 68000 @ 12.5MHz
Memory:
          o 6Mbit (Program, picture data, sound data)
          o 512Kbit (PCM waveform memory)
          o 128Kbit (CD-ROM data cache memory)
          o 64Kbit (Backup memory)
          o 1Mbit (Boot ROM)
Sound:
          o PCM Sound Source:
                + Stereo, 8 Channels.
                + Sampliing wavelength: 32MHz max.
          o D/A Convertor:
                + 16-bit D/A convertor
                + 8x Internal over-sampling digital filter
                + PCM and CD sound mixing.
                + Mixing with mixing terminal possible
          o Audio Characteristics:
                + Wavelength characteristics: 20Hz-20kHz.
                + Signal/Noise Ratio: Over 90dB (1kHz) (Line Out).
                + Stereo channel separation: Over 90dB.
Misc.
          o Battery Backup Durection: Approx. 1 month
          o 1x CD-Rom Drive Speed (150kb/s)
          o Audio Out: L/W RCA pin jack.
          o Dimensions (WHD): 301mm x 212.5mm x 112.5mm (r1),

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

Source: Sega

CPU:
Dual Hitachi SH-2 RISC Processors @ 23 MHz each, 40MIPS.
    * Co-Processors:
          o Genesis 68000, and Z80
          o Genesis 32X VDP
    * Graphics:
          o 32,768 simultaneous colours on screen
          o Genesis resolution
          o Overlaying over existing Genesis/SegaCD video
          o 50,000 texture-mapped polygons/sec
          o Texture mapping
          o Hardware scaling and rotation
    * Sound:
          o Stereo PCM chip
          o Audio mixing with Genesis sound
          o Additional 2 channels (8 Channels total, or 16 with SegaCD)


I do hope some of that info is helpfull :D
If i had a hammer, I would hammer in the morning.... I would hammer in the evening.... I would hammer all day :)

Offline AndyRCM

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Re: New computers added . . .
« Reply #17 on: July 12, 2008, 07:25:53 PM »
Cheers - thanks for that I will update . . . although unfortunately i dont have a mega cd or 32x . . . anybody got one they dont want?

Andy
"I could see the faces of those who led pissing themselves laughing" - Funeral Pyre by The Jam

Offline rain_storm

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Re: New computers added . . .
« Reply #18 on: July 13, 2008, 07:49:48 PM »
I had Mega CD years ago but it broke I tried to fix it but it was one of the pins on the CPU that failed, over heated I guese. binned it years ago sorry. I might still have some of the games at my parents house I will have a look, if they are still there then they are all yours

Offline AndyRCM

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Re: New computers added . . .
« Reply #19 on: July 13, 2008, 09:02:36 PM »
@rain . . . thanks - they are also appreciated . . . anything like that - gotta be good for the museum.

Andy
"I could see the faces of those who led pissing themselves laughing" - Funeral Pyre by The Jam