jam wrote:
>
> Hi, Ricardo!!
>
> RL> Some Sega Master System games do use the 5.5 bits trick, but the
> RL> PSG of the Master isn't a true AY-3-8190. Instead, it is a
>
> :? It sounds strange to me. I've got a Master System and I've seen a fantastic
> AY-3-8910 inside.
The sega master system has a chip wich looks like the V9938
It's the VDP and is clocked at 10mhz ... Inside it has also the PSG.
There may be out other versions of the Hardware ... but the one I meant
has only 2 dedicated (SEGA) ICs one is the VDP/PSG and other is the I/O
chip. All the rest is 3 16kb pseudo SRAM chips (2 for vram and one for
the Z80)
And the Z80 iself.
> RL> SN-something, slower than our one (and also it doesn't have
> RL> envelopes...)
>
> Hmmmm. I think you mean the SN76489A PSG. It's the ColecoVision one :)
The model wich has the PSG inside the VDP uses this TEXAS INSTRUMENTS
PSG ... then it's probably that or you have a "pirate" Master system or
it
isn't a master system or even it's a master system but is of a
diferent hardware
version ...
Cya MSXers ... =)
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