MOS Technology RRIOT

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The 6530 ROM-RAM-I/O-Timer (RRIOT) was an integrated circuit made by MOS Technology, as well as second sources such as Rockwell. It was very similar to the MOS 6532 RIOT, but it incorporated 1 KiB of ROM, in addition to the chip's other features. The static RAM, however, was reduced from 128 bytes to 64. Due to the very high degree of integration provided by this chip, it was often used in situations that today would be handled by a microcontroller.

The form factor was a JEDEC-standard 40-pin ceramic or plastic DIP.

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Interface chips from MOS Technology and second source/clone vendors

6520 PIA ● 6522 VIA ● 6523 TIA ● 6525 TPI ● 6526 CIA ● 6529 SPI ● 6530 RRIOT ● 6532 RIOT ● 6551 ACIA
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