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version of the 6510. The 8500 was originally designed for use in the modernised C64, the C64C. However, in 1985, limited quantities of 8500s were found on older NMOS-based C64s. It finally made its official debut in 1987, appearing in a motherboard using the new 85xx HMOS chipset.
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variant of the 6510 was introduced in 1984. Compared to the 6510, this variant extends the number of I/O port pins from 6 to 8, but omits the pins for non-maskable interrupt and clock output. It is used in
Commodore's
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tape recorder (the electric motor control, key-press sensing and write data lines; the read data line went to another I/O chip). It is possible, by writing the correct
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interface. The main difference between 7501 and 8501 CPUs is that they were manufactured with slightly different processes: 7501 was manufactured with
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port, although 6 I/O pins are available in the most common version of the 6510. In addition, the address bus can be made
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Image of the internals of a
Commodore 64 showing the 6510 CPU (40-pin DIP, lower left). The chip on the right is the
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hardware exposed except for the processor I/O port itself and its data directional register at address $ 00.
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Pin configuration of the most common variation of the 6510 CPU (/HALT in this image refers to the RDY pin.)
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version of the 6510. Other than the process modification, it is virtually identical to the
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In the C64, the extra I/O pins of the processor are used to control the computer's
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to the processor at address $ 01, to completely expose almost the full 64
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The primary change from the 6502 is the addition of an 8-bit general purpose
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208:. The production week/year (WWYY) of each chip is given below its name.
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home computers, where its I/O port controls not only the
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Siliconinsider@Twitter - Die shot of MOS Technology 6510
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MOS 6510 datasheet (preliminary, Nov. 1982, PDF format)
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427:, a version of the 6510 with eight I/O lines. The
32:"6510" redirects here. For the mobile phone, see
538:List of books about 65xx microprocessor families
227:. It is a modified form of the very successful
580:Web server using a MOS 6510 computer (aka C64)
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8:
576:(includes downloadable source code for 6502)
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574:komkon.org - Computer Emulation Resources
239:and its variants. It is also used in the
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549:MOS 6510 datasheet (GIF format, zipped)
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38:
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659:(and 6510T, 6512, 6513, 6514, 6515)
431:and RDY signals are not available.
254:and the CPU can be halted cleanly.
25:
570: (archived February 27, 2023)
471:Butterfield, Jim (January 1983).
231:. The 6510 is widely used in the
166:MOS 8500, 7501/8501, 8502, 6510T
97:0.985 MHz to 1.023 MHz
554:MOS 6510 datasheet (PDF format)
118:Architecture and classification
824:MOS Technology microprocessors
1:
742:Interrupts in 65xx processors
586: (archived July 28, 2018)
517:"6502/6510/8500/8502 Opcodes"
441:Interrupts in 65xx processors
638:(and 6501, 6503, 6504, 6505)
479:. No. 32. p. 208.
473:"Commodore 64 Architecture"
850:
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315:In 1985, MOS produced the
155:Products, models, variants
31:
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493:Hardware – MOS 7501/8501
395:variant is used in the
286:in the C64, leaving no
133:Physical specifications
665:(and 7501, 8500, 8501)
403:compatible (including
373:and 8501 with HMOS-2.
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834:8-bit microprocessors
680:Western Design Center
399:. All these CPUs are
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819:65xx microprocessors
419:disk drive (for the
405:undocumented opcodes
124:Instruction set
27:8-bit microprocessor
383:MOS Technology 8502
214:MOS Technology 6510
59:Common manufacturer
54:General information
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40:MOS Technology 6510
18:MOS Technology 7501
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16:(Redirected from
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620:65xx-based CPUs
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584:Wayback Machine
568:Wayback Machine
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532:Further reading
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504:CPU 7501 / 8501
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627:MOS Technology
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543:External links
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417:Commodore 1551
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381:Main article:
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332:MOS 7501/8501
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268:bank switching
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243:MFM harddisk.
241:Seagate ST-251
225:MOS Technology
221:microprocessor
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66:MOS Technology
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767:Nintendo SA-1
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397:Commodore 128
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365:but also the
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110:Address width
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829:Commodore 64
798:Chuck Peddle
735:Architecture
705:(and 65C802)
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340:MOS 8501 CPU
316:
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233:Commodore 64
223:designed by
213:
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29:
793:Bill Mensch
423:) uses the
387:The 2
276:bit pattern
179:Predecessor
83:Performance
813:Categories
777:Ricoh 5A22
772:Ricoh 2A03
726:740 family
714:Mitsubishi
671:(and 4510)
536:See also:
447:References
411:MOS 6510T
264:memory map
102:Data width
93:clock rate
34:Nokia 6510
786:Designers
391:-capable
377:MOS 8502
363:Datasette
346:7501/8501
311:MOS 8500
272:Datasette
189:Successor
755:machines
515:Graham.
477:Compute!
435:See also
298:Variants
252:tristate
206:6581 SID
193:MOS 8502
183:MOS 6502
128:MOS 6502
74:Synertek
70:Rockwell
718:Renesas
582:at the
566:at the
367:CBM Bus
174:History
160:Variant
144:40-pin
138:Package
703:65C816
698:65C265
693:65C134
669:65CE02
401:opcode
371:HMOS-1
359:Plus/4
235:(C64)
216:is an
688:65C02
629:, CSG
425:6510T
319:, an
218:8-bit
88:Max.
753:game
751:For
663:8502
657:6510
652:6509
647:6508
642:6507
636:6502
415:The
393:8502
357:and
355:C116
344:The
325:NMOS
321:HMOS
317:8500
229:6502
212:The
429:NMI
407:).
389:MHz
351:C16
292:I/O
290:or
288:ROM
284:RAM
282:of
266:by
258:Use
248:I/O
146:DIP
90:CPU
815::
716:,
519:.
485:^
475:.
353:,
280:KB
113:16
72:,
68:,
613:e
606:t
599:v
523:.
105:8
36:.
20:)
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