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Philips P2000M

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Philips P2000M
Philips P2000M (Field Support manual fig 1.2)
The P2000M basic cabinet in front of its monitor cabinet, from Philips's Field Support manual (figure 1.2).
Specifications
ManufacturerPhilips
TypePersonal computer
CPUZilog Z80, 2.5 MHz[1][2]
Memory16 KB system RAM, 4 KB video RAM; extension board for 16 or 32 KB more[1]
StorageMini-cassette drive; up to two 5.25-inch single-sided floppy drives, 140 KB each, in the monitor cabinet[1][3]
Display12-inch monochrome monitor, 24 rows of 80 characters[1]
SoundBeeper in the basic cabinet[1]
ROM4 KB monitor ROM; programs on 16 KB ROM cartridges[1]
PowerMains, basic cabinet 52 VA; monitor cabinet 58 VA nominal, 80 VA peak[4]
DimensionsBasic cabinet 410 × 466 × 110 mm; monitor cabinet 396 × 380 × 335 mm[4]
WeightBasic cabinet 7.6 kg; monitor cabinet 11.0 kg[4]
OS / Firmware—

The Philips P2000M is the monitor version of the Philips P2000 microcomputer. It uses the basic cabinet of the Philips P2000T, with keyboard, mini-cassette drive and cartridge slots, but drives a 12-inch monitor in a second cabinet that also houses up to two 5.25-inch floppy disk drives. It shows 80 characters per row where the P2000T shows 40.[3][1] Philips's Field Support manual of November 1981 already covers both versions.[5]

Hardware

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Basic cabinet

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The basic cabinet is the same as the P2000T's with three differences: the CPU board has no video or television interface; a video board in the lower slot of the card cage holds 4 KB of video memory and the monitor interface; and a CP/M board can be added as a memory remapping kit so that the machine runs either the original P2000 software or CP/M.[6][7]

P2000M boards and units (Field Support manual, chapter 6)
Part Philips number
CPU board, "Business" version PCB 5103 108 00500
Video board PCB 5103 108 01220
Extension board (floppy controller and memory) PCB 5103 108 00523
Basic cabinet power supply PCB PSU 5103 108 00470
Monitor cabinet power supply PCB power supply monitor 5103 108 50350

[8][9][10][11][12]

Monitor cabinet

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The monitor cabinet is a plastic frame on a metal stand with a tilt screw at the back. The front cover carries the brightness control, the power switch and the power indicator lamp. Inside are the monitor assembly (tube and electronics), a mains transformer, a power supply board on a heat sink, and one or two disk drives on a metal plate.[13] The monitor is a FIMI 12-inch, 90-degree unit with a P31 phosphor and an antiglare finish, fed with a composite video (FBAS) signal.[1]

Display and disk drives (Field Service Manual, section 1.1.4.1)
Item Specification
Screen format 24 rows of 80 characters; 6 × 10 character matrix in an 8 × 12 dot cell
Attributes Blinking underline cursor, inverse, blinking, underline, graphics; restricted teletext character set
Floppy drives 5.25-inch single-sided; 35 tracks of 16 soft sectors of 256 bytes; 140 KB formatted; MFM; 40 ms track to track, 643 ms average access
Cassette drive ELA mini-cassette drive, DB4401 cassettes, 6 KB/s transfer, 95 s transport time, phase encoding

[1]

The Field Service Manual shows Shugart SA 400 and SA 400L drives and gives their strap settings.[14]

Power

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Each cabinet has its own mains supply. The basic cabinet supply is the P2000T's, with three 7805 regulators and a 7812; on the M-version the second 7805 feeds the video board.[15][16] The monitor cabinet supply has a 7805 for the floppy drives' +5 V, a 723 regulator with a BD645 transistor for the drives' +12 V (adjustable with R4), and a 7812 for the monitor.[15][17]

Power requirements (Field Service Manual, p. 1-14)
Cabinet Mains Consumption Fuses
Basic 220 V ±10 % (factory wired) or 110 V ±10 % 52 VA nominal 5 A (+5 V); 2 × 1 A fast (+12 V and -V)
Monitor 220 V ±10 % (factory wired) or 240 V ±10 % 58 VA nominal, 80 VA peak, with two drives 1.25 A (monitor assembly); 2 A (T); 4 A (T)

[4]

Maintenance and repair

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The Field Service Manual has a separate fault isolation procedure for the M-version, replacement procedures for the monitor assembly, floppy drives and monitor cabinet power supply, and the monitor adjustments.[18]

Documentation

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The Field Service Manual (1982), the Field Support manual (1981) and the 1984 service lecture notes are hosted and described on Philips P2000 Documentation.

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  • The opened monitor cabinet (Field Service Manual, figure 1.9)
    The opened monitor cabinet (Field Service Manual, figure 1.9)
  • The monitor cabinet power supply (Field Support manual, figure 4.16)
    The monitor cabinet power supply (Field Support manual, figure 4.16)
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References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Philips Data Systems, Field Service Manual P2000, October 1982, pp. 1-12 and 1-13, sections 1.1.4.1.2 to 1.1.4.1.4: M-version data (Z80, ROM, RAM including the 4K8 video page, keyboard, beeper in the basic cabinet, printer interface, I/O cartridges, screen: FBAS, FIMI 12"/90° monitor, P31 phosphor, 24 rows of 80 characters, character matrix, attributes), the cassette drive and the floppy drive. Hosted as File:Philips P2000 Field Service Manual 5122 991 30703.pdf.
  2. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 3-3, section 3.1.1: system timing from a 20 MHz crystal with a 2.5 MHz CPU clock. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  3. ↑ 3.0 3.1 Philips Data Systems, Field Service Manual P2000, publication 5122 991 30703, October 1982, p. 1-5: the M-version as two cabinets, the basic cabinet interfacing to the professional monitor of the monitor cabinet, which also houses up to two mini floppy disc drives. Hosted as File:Philips P2000 Field Service Manual 5122 991 30703.pdf.
  4. ↑ 4.0 4.1 4.2 4.3 Philips Data Systems, Field Service Manual P2000, October 1982, p. 1-14, sections 1.1.4.2 and 1.1.4.3: power requirements, fuses, dimensions and weights of the basic and monitor cabinets. Hosted as File:Philips P2000 Field Service Manual 5122 991 30703.pdf.
  5. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 1-3: the T and M versions. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  6. ↑ Philips Data Systems, Field Service Manual P2000, October 1982, p. 1-7, section 1.1.2.2: differences of the M-version (CPU board without video and TV interface, video board with 4K video memory and monitor interface, CP/M board option) and the monitor cabinet units. Hosted as File:Philips P2000 Field Service Manual 5122 991 30703.pdf.
  7. ↑ Philips Data Systems, Field Service Manual P2000, October 1982, p. 1-9, section 1.1.3.1: the lower card cage slot houses the video board in the M-version. Hosted as File:Philips P2000 Field Service Manual 5122 991 30703.pdf.
  8. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 6-23: PCB Business CPU 5103 108 00500. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  9. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 6-17: PCB video board 5103 108 01220. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  10. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 6-13: PCB extension board 5103 108 00523. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  11. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 6-27: PCB PSU 5103 108 00470. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  12. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 6-49: PCB power supply monitor 5103 108 50350. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  13. ↑ Philips Data Systems, Field Service Manual P2000, October 1982, p. 1-11, section 1.1.3.2: monitor cabinet (frame, metal stand and tilt screw, front cover with brightness potentiometer, power switch and indicator lamp, monitor assembly, mains transformer, power supply unit of PCB and heat sink, disk drives on a metal plate). Hosted as File:Philips P2000 Field Service Manual 5122 991 30703.pdf.
  14. ↑ Philips Data Systems, Field Service Manual P2000, October 1982, pp. 1-36 to 1-41: figure 1.13 (floppy drive SA 400) and section 1.2.6.2, strap settings for the SA 400 and SA 400L. Hosted as File:Philips P2000 Field Service Manual 5122 991 30703.pdf.
  15. ↑ 15.0 15.1 Philips, Documentatie P 2000 (Field Support manual, 8111), p. 3-23, sections 3.4.1 and 3.4.2: the basic and monitor cabinet power supplies. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  16. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 4-33, figure 4.14: power supply basic cabinet (regulator 2 to the video board). Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  17. ↑ Philips, Documentatie P 2000 (Field Support manual, 8111), p. 4-35, figure 4.16: power supply monitor cabinet. Hosted as File:Philips P2000 Field Support Manual 8111.pdf.
  18. ↑ Philips Data Systems, Field Service Manual P2000, October 1982, pp. 1-22 to 1-43: the M-version troubleshooting procedure (1.2.4.2), replacements (1.2.5.6 to 1.2.5.8) and the M-version picture adjustments (1.2.7.2). Hosted as File:Philips P2000 Field Service Manual 5122 991 30703.pdf.


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