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1 vote

Did any 8-bit device ever merge a CPU core?

One of the earliest microcontrollers were General Instruments PIC family (1976): https://en.wikipedia.org/wiki/PIC_microcontrollers, whose derivatives are still manufactured today (by Microchip). ...
Grabul's user avatar
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1 vote

Did any 8-bit device ever merge a CPU core?

To throw in some extra examples: the Atari Lynx’s Mikey is a 65c02 core that also drives the LCD, provides timers and audio, and does some limited degree of power management; the Game Boy uses a ...
Tommy's user avatar
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2 votes

Did any 8-bit device ever merge a CPU core?

Just have a look into the other beige box: The 6510 used in the Commodore 64 is "somewhat" of a microcontroller, as it added 6 bits of GPIO to the 6502. So, it actually was done, even by ...
tofro's user avatar
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1 vote

Did anyone use quarter-bad RAM chips?

Notwithstanding the discussion whether using the term "half-bad" is really viable: Those chips worked according to their specification, so they were "good, but half-capacity". With ...
tofro's user avatar
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3 votes
Accepted

Did anyone use quarter-bad RAM chips?

You might want to take a look at real chips. Access is organized in rows and columns. any error will disable it's whole column (or row, depending on organizaion), thus there are no 'quarter good' ...
Raffzahn's user avatar
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10 votes

Did any 8-bit device ever merge a CPU core?

There were real microcontrollers based on the 6502: the Rockwell R6501Q and R6511Q from 1982 for example. also This is a real SOC that was commercialized in the early 1980s. The German magazin c't ...
Patrick Schlüter's user avatar
1 vote

Did any 8-bit device ever merge a CPU core?

I don't know if you'd still consider the mid-1990s PcW16 to be part of the "8-bit era", but it incorporates a Z80-compatible processor into its main ASIC. From the technical spec: The Anne ...
john_e's user avatar
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3 votes

Did any 8-bit device ever merge a CPU core?

The 6570 was used in the original Amiga 1000 keyboard and is an example of a chip using the 6502 CPU core with additional embedded circuitry to function as a dedicated keyboard interface and ...
dmarietta's user avatar
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4 votes

Did any 8-bit device ever merge a CPU core?

Besides microcontrollers such as 8048, 6805, ... one of the earliest cases of CPUs integrated with ROM, RAM and peripherals such as keyboard, display output was ... pocket calculators. Single-chip ...
Grabul's user avatar
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10 votes

Did any 8-bit device ever merge a CPU core?

The CSG 4510 was a CSG 65CE02 with two 6526 CIA I/O port controllers and a custom MMU to expand the address space to 20 bits (1 megabyte). It was used in the unreleased Commodore 65 and the unreleased ...
Tim Locke's user avatar
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26 votes
Accepted

Did any 8-bit device ever merge a CPU core?

The answer is, yes, and before the 1980s. For example, Nintendo released the NES in 1983, and the Ricoh 2A03/2A07 microprocessors integrated an unlicensed MOS Technology 6502 core derivative with a ...
Justme's user avatar
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20 votes

Did any 8-bit device ever merge a CPU core?

Was any CPU core ever merged into another chip Arguably, that is the definition of a microcontroller. From Wikipedia: A microcontroller (MC, UC, or μC) or microcontroller unit (MCU) is a small ...
manassehkatz-Moving 2 Codidact's user avatar

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