Tableless version

Directories in /pub/cbm/schematics/computers/c128/
The Commodore 128 existed in three different major board versions: The first board was used in the flat 128 and in the plastic-cased 128D. Then came the 128DCR board, with the floppy controller integrated on the motherboard. There was also a 128CR (cost-reduced flat 128).
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drives@ Disk drives
firmware@ System firmware
manual/ Service manual
power/ Power supply schematics

Files in /pub/cbm/schematics/computers/c128/
DateSizeFilenameDescription
1996-11-27 118674 310378-1-left.gif
1996-11-27 113712 310378-1-right.gif
1996-11-27 99301 310378-2-left.gif
1996-11-27 107805 310378-2-right.gif
1996-11-27 130766 310378-3-left.gif
1996-11-27 77337 310378-3-right.gif
1996-11-27 99507 310378-4-left.gif
1996-11-27 90149 310378-4-right.gif These are the schematic diagrams of the Commodore 128 main board ("flat C128" and C128D in plastic case). They were on eight pages in the Commodore 128 Programmer's Reference Guide, two pages containing one engineering sheet.
1998-05-15 747229 310378-update.zip Update to the Commodore 128 Service Manual, containing the two revised pages in the 310378 schematic revision 7A.
2000-02-23 1115174 c128cr.jpg A black&white picture of a cost-reduced flat Commodore 128 circuit board. This model never entered mass production; this is an engineering sample possessed by Raymond Carlsen. The board says "PCB ASSY NO. 250783", "C= commodore C128CR REV.3", "PCB NO. 252270", and "C128CR No.2 ENG. SAMPLE Jun/9/'86 KNT".
1996-12-13 172416 c128dcr-1-left.gif
1996-12-13 90870 c128dcr-1-right.gif
1996-12-13 143437 c128dcr-2-left.gif
1996-12-13 148206 c128dcr-2-right.gif
1996-12-13 128384 c128dcr-3-left.gif
1996-12-13 134398 c128dcr-3-right.gif
1996-12-13 77902 c128dcr-4-left.gif
1996-12-13 58823 c128dcr-4-right.gif
1996-12-13 126315 c128dcr-5-left.gif
1996-12-13 144315 c128dcr-5-right.gif These are the schematic diagrams of the Commodore 128DCR main board (metal case C128D with built-in 1571CR floppy controller). The diagrams were scanned from a 64'er Sonderheft, and they appear to be a copy of schematic 252451.
According to Nicolas Welte, there is an error on the right half of page 5. The 74LS14 hex Schmitt-trigger inverter U113, pin 13 is connected to WPRT* (misprinted WTRT* on U105), which doesn't make any sense. Obviously it should be connected to STP1 instead, which is three lines more to the right!

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