Questions tagged [tms9918]
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3
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TMS9918 - why have separate data-in and data-out?
Usually 8bit video chips interface with DRAM using:
an address bus for rows and columns,
a bidirectional data bus
in the case of 1bit DRAM data-in and data-out pins are shorted on the same data line....
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15
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TMS9900 registers in RAM performance
Reading over the design of the TMS9900 it is often claimed that the R0 - R15 registers are in RAM because semiconductor RAM ran at the same speed as the CPU and therefore there was no penalty to doing ...
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Are there any 1980's video chips still available besides the TMS9918?
The TMS9918 is still available, which is nice.
But are there any other (better) video chips still on the (after-)market in any numbers? Obviously Commodore's VIC-II is not one of them.
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