Date: 19970913 From: Mario Becroft To: Multiple recipients of list CHIPDIR-L Subject: Commodore 64 chips - what are they I have an old Commodore 64 which is not of any use to me as it is, but I thought I might salvage some chips from it that would be useful. I seem to remember that the C64 has a 6502 CPU, for example. Can anyone tell me what the various chips are? They all seem to have unusual numbering which I don't immediately recognise. These are the numbers: * 6581 * 6510 CBM (is this the 6502??) * 6526 * 906114-01 (is this a 2Kx4 SRAM?) * 6569R3 Your assistance would be appreciated. -- Mario Becroft Date: 19970913 From: Jaap van Ganswijk To: Multiple recipients of list CHIPDIR-L Subject: Re: Commodore 64 chips - what are they At 09:30 1997-09-13 -0800, Mario Becroft wrote: >Hello, > >This is my first post to this list so please forgive me if I made a >mistake with it... > >I have an old Commodore 64 which is not of any use to me as it is, but I >thought I might salvage some chips from it that would be useful. I seem to >remember that the C64 has a 6502 CPU, for example. > >Can anyone tell me what the various chips are? They all seem to have >unusual numbering which I don't immediately recognise. > >These are the numbers: >* 6581 >* 6510 CBM (is this the 6502??) Yes, it's also in the Atari 600/800XL >* 6526 >* 906114-01 (is this a 2Kx4 SRAM?) >* 6569R3 The C64 has a lot of custom chips (for graphics and sound). They often went belly-up and needed to be replaced and since they were very expensive it made repairs expensive. At some time about 10% of all C64's coming directly from the factory were broke, I once heard from someone who did repairs for a computer store. Greetings, Jaap Date: 19970914 From: Mike Sprecher To: Multiple recipients of list CHIPDIR-L Subject: Re: Commodore 64 chips - what are they ATTENTION ! The chips used in the C-64 basically are Motorola parts. However, the company MOS technologies adapted them. This means they ARE pin-compatible to their (motorola's) originals, BUT THEY DO NOT FIT ELECTRICALLY. I was always told they implemented some sort of diodes on every pin... (Well: You for sure can't use normal chips inside the C-64, but maybe the C-64 chips work in normal environement...) >>Can anyone tell me what the various chips are? They all seem to have >>unusual numbering which I don't immediately recognise. >> >>These are the numbers: >>* 6581 >>* 6510 CBM (is this the 6502??) 6581 is called SID (Sound Interface Device) and is the SOUND CHIP (which also controlled the 2 joyPorts). The C-64-II (rev.3) used the SID 6580R5. The 6510 is (for the user) the same as the 6510 or the 8510. Its a simple 8-bit CPU that can be driven at 1 MHz or 2 MHz (8510). It is very convenient to programm because its only 57 commands. The C-64-II (rev.3) used the CPU 8500.. >>* 6526 >>* 906114-01 (is this a 2Kx4 SRAM?) >>* 6569R3 6526 is the CIA that controlled the Keyboard. The second was used for its two 16-bit timers and to drive the RS-232 port. 906114-01 : I thinks its the BASIC-ROM, but could also be the Kernel ROM (8K) 6569 : VIC, Video Interface chip. The Video-Controller and the "chief" of the whole 64. Could display something about 320*240 at 16 colors or so. R3 means third revision of the die. The C-64-II (rev.3) used the VIC 8565R2, which needed no more cooling:-). The faults Jaap discussed in his mail are in fact true. However, the only occured in the early models where the VIC even needed cooling! The C-64 is very badly designed, in SW as well as in HW. Almost every BASIC-command had a bug somwhere. But normal users don't find this out. I only have the C-64-II and the C-128d-II so they have different chips and some sort of early glue chips. I never ever had any problem with those machine except that they crashed too much... I can provide schematics, if anyone is interested. I will make them available on my homepage shortly: http://www.datacomm.ch/~catalyst Mike ---------------- Michael Sprecher ---------------- Date: 19970914 From: Keith Welker To: Multiple recipients of list CHIPDIR-L Subject: Re: Commodore 64 chips - what are they 6581 - 12 volt SID sound interface device (28 pins) 6526 - CIA complex interface adaptor (40 pins) 906114-01 - (82S100PLA) programable logic array (28 pins) I'm not sure about the other chips. These chips are available from Jameco (www.jameco.com) so they might have links to their data sheets. You could also try http://sps.motorola.com to search for the data sheets if you need them. Keith Welker Ohio University student Electrical Engineering Department From: Ferry Schouten Subject: Re: Commodore 64 chips - what are they MB>I have an old Commodore 64 MB>Can anyone tell me what the various chips are? They all seem to have MB>unusual numbering which I don't immediately recognise. MB> MB>These are the numbers: MB>* 6581 That's the C64's sound chip (SID). It has 3 AM synthsizer channels and one 4-bit sample channel... MB>* 6510 CBM (is this the 6502??) Well, the 6510 is basically a 6502 with 2 8bit I/O ports added to it (Used for memory paging and tape I/O) MB>* 6526 The CIA (Complex Interface Adapter) A super I/O chip with 2 8bit I/O channels, a serial port, real-time clock, 2 programmable timer/counters. MB>* 906114-01 (is this a 2Kx4 SRAM?) Yes, that is... MB>* 6569R3 That's the C64's video chip...