/pub/cbm/schematics/computers/b/

314010-06-i.gif 1998-03-29 29724: Service manual, B model computer: (Jan. 1985, PN-314010-06), title page
314010-06-ii.gif 1998-03-29 27628: Service manual, B model computer: table of contents
314010-06-p1.gif 1998-03-29 58149: Service manual, B model computer: Page 1: block diagram
314010-06-p2.gif 1998-03-29 46741: Service manual, B model computer: Page 2: B model parts list
314010-06-p3-left.gif 1998-03-29 60694: Service manual, B model computer: Page3: 8256048 board left side
314010-06-p3-right.gif 1998-03-29 79404: Service manual, B model computer: Page 3: 8256048 board right side
314010-06-p4.gif 1998-03-29 74105: Service manual, B model computer: Page 4: 8256048 PCB parts
314010-06-p5.gif 1998-03-29 66252: Service manual, B model computer: Page 5: 8256048 PCB parts, continued
314010-06-p6-left.gif 1998-03-29 40857: Service manual, B model computer: Page 6: keyboard matrix left side
314010-06-p6-right.gif 1998-03-29 42640: Service manual, B model computer: Page 6: keyboard matrix right side
4256004-01-left.gif 1998-03-29 35712: Commodore CBM-II B model Switching power supply, left side
4256004-01-parts.gif 1998-03-29 58167: Commodore CBM-II B model Switching power supply, Parts list
4256004-01-right.gif 1998-03-29 44598: Commodore CBM-II B model Switching power supply, right side
4256041-01of15.gif 1998-09-28 346636: Commodore P500 Color Computer: address & data buffers, arbitration logic
4256041-02of15.gif 1998-09-27 264513: Commodore P500 Color Computer: system decode & buffer control
4256041-03of15.gif 1998-09-28 292293: Commodore P500 Color Computer: VIC; video memory; video bus buffers
4256041-04of15.gif 1998-09-27 192900: Commodore P500 Color Computer: SID; 192k DRAM array refresh logic
4256041-05of15.gif 1998-09-28 279736: Commodore P500 Color Computer: 192k DRAM address mux & control
4256041-06of15.gif 1998-09-27 238991: Commodore P500 Color Computer: 192k*8 DRAM array [64k standard, 128k optional]
4256041-07of15.gif 1998-09-28 223503: Commodore P500 Color Computer: 64k DRAM array and address mux
4256041-08of15.gif 1998-09-28 194905: Commodore P500 Color Computer: system ROM/RAM array
4256041-09of15.gif 1998-09-28 273583: Commodore P500 Color Computer: gameport interface; keyboard interface; RS232C interface
4256041-10of15.gif 1998-09-27 295118: Commodore P500 Color Computer: interrupt prioritization; IEEE488 interface; user/game port interface
4256041-11of15.gif 1998-09-28 258517: Commodore P500 Color Computer: cassette i/f port
4256041-12of15.gif 1998-09-27 193891: Commodore P500 Color Computer: main oscillators & PLL
4256041-13of15.gif 1998-09-28 150690: Commodore P500 Color Computer: video output circuit
4256041-14of15.gif 1998-09-27 289443: Commodore P500 Color Computer: [List of power filter capacitors for each IC]
4256041-15of15.gif 1998-09-28 211721: Commodore P500 Color Computer: [FPLA logic equations]
4256047-01.jpg 2018-06-22 3210191
4256047-02.jpg 2018-06-22 2793038
4256047-03.jpg 2018-06-22 2792216: CBM-II z80 board schematic.
8088.gif 2002-03-05 155989
8088.txt 2002-04-19 10991: The 8088 co-processor board for B-series machines. Reverse engineered
by Ruud Baltissen http://ruud.c64.org.
8256043-01of14-left.gif 1998-03-29 61535: CBM-II LP: schematic P1, left side: address & data buffers, bus arbitration
8256043-01of14-right.gif 1998-03-29 56042: CBM-II LP: schematic P1, right side: address & data buffers, bus arbitration
8256043-02of14-left.gif 1998-03-29 27636: CBM-II LP: schematic P2, left side: master timing
8256043-02of14-right.gif 1998-03-29 47170: CBM-II LP: schematic P2, right side: master timing
8256043-03of14-left.gif 1998-03-29 40539: CBM-II LP: schematic P3, left side: DRAM address & refresh
8256043-03of14-right.gif 1998-03-29 28812: CBM-II LP: schematic P3, right side: DRAM address & refresh
8256043-04of14-left.gif 1998-03-29 31695: CBM-II LP: schematic P4, left side: DRAMs, segments 1-2
8256043-04of14-right.gif 1998-03-29 29054: CBM-II LP: schematic P4, right side: DRAMs, segments 1-2
8256043-05of14-left.gif 1998-03-29 31825: CBM-II LP: schematic P5, left side: DRAMs, segments 3-4
8256043-05of14-right.gif 1998-03-29 29841: CBM-II LP: schematic P5, right side: DRAMs, segments 3-4
8256043-06of14-left.gif 1998-03-29 27122: CBM-II LP: schematic P6, left side: ROM array, 1k×8 static RAM
8256043-06of14-right.gif 1998-03-29 32195: CBM-II LP: schematic P6, right side: ROM array, 1k×8 static RAM
8256043-07of14-left.gif 1998-03-29 28442: CBM-II LP: schematic P7, left side: system decode
8256043-07of14-right.gif 1998-03-29 43144: CBM-II LP: schematic P7, right side: system decode
8256043-08of14-left.gif 1998-03-29 26866: CBM-II LP: schematic P8, left side: CRTC, video shift register
8256043-08of14-right.gif 1998-03-29 32189: CBM-II LP: schematic P8, right side: CRTC, video shift register
8256043-09of14-left.gif 1998-03-29 22887: CBM-II LP: schematic P9, left side: video RAM, address mux, latch
8256043-09of14-right.gif 1998-03-29 26607: CBM-II LP: schematic P9, right side: video RAM, address mux, latch
8256043-10of14-left.gif 1998-03-29 45846: CBM-II LP: schematic P10, left side: keyboard port, RS232C
8256043-10of14-right.gif 1998-03-29 42104: CBM-II LP: schematic P10, right side: keyboard port, RS232C
8256043-11of14-left.gif 1998-03-29 62363: CBM-II LP: schematic P11, left side: user I/O ports, IEEE
8256043-11of14-right.gif 1998-03-29 50878: CBM-II LP: schematic P11, right side: user I/O ports, IEEE
8256043-12of14-left.gif 1998-03-29 53904: CBM-II LP: schematic P12, left side: SID, dot clock oscillator, expansion connector
8256043-12of14-right.gif 1998-03-29 50410: CBM-II LP: schematic P12, right side: SID, dot clock oscillator, expansion connector
8256043-13of14.gif 1998-03-29 27850: CBM-II LP: schematic P13: video output, power indicator
8256043-14of14.gif 1998-04-17 81574: CBM-II LP: schematic P14: I.C. count, power consumption
8256059-01.gif 1998-05-28 159301: CBM-II HP: schematic P1: address and data bus arbitration
8256059-02.gif 1998-06-02 104788: CBM-II HP: schematic P2: master timing
8256059-03.gif 1998-06-02 104071: CBM-II HP: schematic P3: dram address and refresh
8256059-04.gif 1998-06-02 91274: CBM-II HP: schematic P4: dram segment 1 and 2
8256059-05.gif 1998-05-29 92943: CBM-II HP: schematic P5: dram segment 3 and 4
8256059-06.gif 1998-05-29 81230: CBM-II HP: schematic P6: rom array, 1kx8 static rom
8256059-07.gif 1998-05-29 97112: CBM-II HP: schematic P7: system decode
8256059-08.gif 1998-05-29 102877: CBM-II HP: schematic P8: crtc, video shift reg outputs
8256059-09.gif 1998-06-01 76584: CBM-II HP: schematic P9: video ram, address mux, latch
8256059-10.gif 1998-06-02 116642: CBM-II HP: schematic P10: keyport port1 rs232c
8256059-11.gif 1998-06-02 150061: CBM-II HP: schematic P11: user i/o ports, ieee-488
8256059-12.gif 1998-06-02 136422: CBM-II HP: schematic P12: sid, casette, dotclk osc, expanse
cbm-610-psu-german.jpg 2020-10-19 692236: CBM 610 Power Supply schematic, uploaded by Christian Forstreuter
CBM-II-partial700Schematic.zip 2018-05-17 417579: Contains partial schematic of CBM 7xx series, drawn by Ruud Baltissen
cbm2-schematics-4256004-01-lp-ps.pdf 2020-07-27 89502: Commodore CBM-II B model Switching power supply, full schematic
cbm2-schematics-8256043-bl.pdf 2020-07-27 8375143: CBM-II LP Full Schematic doc
cbm2_hires_color_graphic_1_of_4.png 2018-06-23 1256894
cbm2_hires_color_graphic_2_of_4.png 2018-06-23 913450
cbm2_hires_color_graphic_3_of_4.png 2018-06-23 477415
cbm2_hires_color_graphic_4_of_4.png 2018-06-23 350418: Schematic of unknown CBM-II Hi-Res Graphic something
cbm500-700keyboardAdapter.jpg 2017-09-14 571729: Pinout useful to adapting a B500 keyboard for the B700 series. From Alessandro
Liberalto
cbm700-ceag-PSU.jpg 2016-03-01 898999: Schematic of B710 power supply, drawn by Christian Forstreuter
** Note: rumored that the TDA 1060 pin 13 (over-voltage prot input) is
floating on many of these supplies, which can lead to failure. The

recommendation is to ground it to pin 12 if that is the case.
CBM700_CRT_Schematics.pdf 2021-09-14 1212990: Schematics for CRT board used in CBM 700 series, as well as the CBM 128-80 and
256-80
cbm700keyboardPinout.gif 2017-07-19 143540: cbm 700 (HP) keyboard pinout (by Liberalato Alessandro)
CBM_8088_CPU_co-processor_schematic.pdf 2017-10-20 6290321: Schematic to 8088 option card for CBM-II machines.
p500-keyboard.txt 1999-07-30 3512: Commodore P500 Keyboard Schematic. Composed by Tony Duell
<ard@p850ug1.demon.co.uk>.
parts.txt 2015-07-08 1779: Parts list for CBM-II series computers, from William Levak
README 1998-10-20 1169: General information about the Commodore Model II computers.
README500 1998-10-20 920: Information about the Commodore 500 a.k.a. PET II.
TDA1060-issue.txt 2021-07-11 258: Information about an issue in CBM-II power supplies with the TDA1060 chip.

/pub/cbm/schematics/computers/b/

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