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The Ricoh 2A03's sound hardware has 5 channels, separated into two APUs (Audio Processing Units). The first APU contains two general purpose pulse channels with 4 duty cycles, and the second APU contains a triangle wave generator, an LFSR-based Noise generator, and a 1-bit Delta modulation-encoded PCM (DPCM) channel. While a majority of the NES ...
The BASIC included on the original PET 2001 was known as Commodore BASIC 1.0; Microsoft supplied Commodore with a source listing for their 6502 BASIC, essentially a port of BASIC-80, and Commodore performed the rest of the work themselves, including changing the startup screen and prompts, adding I/O support, the SYS command for invoking ...
KIM-1 computer in operation The KIM-1 , short for Keyboard Input Monitor , is a small 6502 -based single-board computer developed and produced by MOS Technology, Inc. and launched in 1976. It was very successful in that period, due to its low price (thanks to the inexpensive 6502 microprocessor) and easy-access expandability.
The 65xx family of microprocessors, consisting of the MOS Technology 6502 and its derivatives, the WDC 65C02, WDC 65C802 and WDC 65C816, and CSG 65CE02, all handle interrupts in a similar fashion. There are three hardware interrupt signals common to all 65xx processors and one software interrupt , the BRK instruction.
A domestically produced "partitioned 588 series" CPU was used on early pre-production series, which simulated the MOS Technology 6502 microprocessor instruction set. [9] While this permitted some degree of compatibility with the Apple, timing differences between the two CPUs rendered certain tasks (such as floppy disk access and sound ...
The Compukit UK101 microcomputer (1979) [1] is a kit [2] clone of the Ohio Scientific Superboard II single-board computer, with a few enhancements for the UK market - notably replacing the 24×24 (add guardband kit to give 32×32) screen display with a more useful 48×16 layout working at UK video frequencies.
Features common to both the P and B-series included a MOS Technology 6509 CPU, an enhanced version of the venerable 6502, that was capable of addressing up to 1 megabyte of RAM via bank switching (however, no CBM-II model came with more than 256 kilobytes of RAM). The sound chip is the 6581 SID, the same one that was used in the popular C64 but ...