IBM PS/2 Model 30
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| IBM PS/2 Model 30 (8530) | |
| Specifications | |
|---|---|
| Manufacturer | IBM |
| Type | Desktop personal computer |
| Released | 2 April 1987 (Model 30); 13 September 1988 (Model 30 286) |
| Intro price | US$1,695 (8530-002), US$2,295 (8530-021); US$2,595 (8530-E21)[1][2] |
| CPU | Intel 8086-2 at 8 MHz, no wait states (Model 30); Intel 80286 at 10 MHz, one wait state (Model 30 286) |
| Memory | 640 KB (Model 30); 512 KB to 4 MB on the system board (Model 30 286) |
| Storage | 3.5-inch diskette drives (720 KB on the Model 30, 1.44 MB on the 286); 20, 30 or 45 MB fixed disk |
| Display | MCGA (Model 30) or VGA (Model 30 286), on the system board |
| Sound | Speaker |
| Dimensions | 406 × 398 × 102 mm (Model 30 286)[3] |
| OS / Firmware | IBM DOS 3.30 (Model 30); DOS 3.30 or 4.00, OS/2 Standard Edition 1.1 (Model 30 286) |
| Predecessor | IBM PC XT (5160) |
| Model no. | 8530 |
The IBM Personal System/2 Model 30 (machine type 8530) is a desktop computer that IBM announced on 2 April 1987, the same day as the IBM PS/2 Model 50, IBM PS/2 Model 60 and IBM PS/2 Model 80. It was the only one of the four with an ISA (PC and PC XT) expansion bus instead of Micro Channel. IBM described it as offering more function than the IBM PC and PC XT at a lower price.[1]
IBM sold two generations under the Model 30 name. The original uses an Intel 8086-2 at 8 MHz with MCGA graphics and three 8-bit slots. The Model 30 286, announced on 13 September 1988, uses an 80286 at 10 MHz with VGA and accepts most PC AT adapter cards.[2] The two share the case, the riser-card layout and the single-cable drive interface, but little else electrically. The all-in-one IBM PS/2 Model 25 is closely related: its 8086 planars use largely the same reference designators as the 8086 Model 30.[4]
Models
[edit | edit source]| Submodel | Processor | Standard memory | Diskette drives | Fixed disk |
|---|---|---|---|---|
| 8530-001 | 8086-2, 8 MHz | 640 KB | 720 KB | none |
| 8530-002 | 8086-2, 8 MHz | 640 KB | two 720 KB | none |
| 8530-021 | 8086-2, 8 MHz | 640 KB | one 720 KB | 20 MB |
| 8530-E01 | 80286, 10 MHz | 512 KB | one 1.44 MB | none |
| 8530-E21 | 80286, 10 MHz | 512 KB | one 1.44 MB | 20 MB |
| 8530-E31 | 80286, 10 MHz | 1 MB | one 1.44 MB | 30 MB |
| 8530-E41 | 80286, 10 MHz | 1 MB | one 1.44 MB | 45 MB |
The 002 and 021 are from IBM's 1987 announcement, the E01 and E21 from the September 1988 announcements, and the E31 and E41 from the specification table in IBM's 1994 PS/2 Hardware Maintenance Manual, which gives 1 MB standard and 4 MB maximum for every 286 submodel.[1][2][5][6] The 8530-001 is not in the 1987 announcement; IBM's service literature lists it without a fixed disk. The E2R and E0R are the E21 and E01 with a 50-key function keyboard for bank tellers.[7]
Telling the two generations apart
[edit | edit source]| Model 30 | Model 30 286 | |
|---|---|---|
| Processor | 8086-2 at U10 | 80286 at ZM36 (PGA socket on the early planar, PLCC on the later one) |
| Support logic | IBM gate arrays | VLSI VL82CPCAT chipset, ZM2–ZM6 |
| Video | MCGA | VGA (15F6864 at ZM18) |
| Slots | Three 8-bit | Three 16-bit |
| Clock | MM58167AN at U16, 3 V cell soldered to the riser | DS1287 clock module in a socket at ZM35 |
| Diskette drive as shipped | 720 KB | 1.44 MB ("1.44" on the eject button) |
| Power supply | 70 W, selects its input voltage itself | 90 W, voltage switch on the rear |
Sources: the planar maps,[4][8] the announcements[1][2] and the Model 30 286 Hardware Maintenance Reference.[3]
System board
[edit | edit source]Model 30
[edit | edit source]The planar exists as the original P/N 61X8823 and two later builds made at IBM Greenock, P/N 33F4888 and FRU 33F8474. Their layouts differ, but the reference designators are largely the same, and largely the same as on the 8086 Model 25.[4] IBM's Technical Reference describes the board as built around five gate arrays: two for processor support, two for video and one for the diskette controller.[9]
| Designator | Device |
|---|---|
| U5 | Inmos IMSG171S RAMDAC |
| U8 | Intel P8253-5 timer |
| U9, U15 | IBM gate arrays 72X8203 and 72X8202 |
| U10 | Intel 8086-2 |
| U11, U12 | MCGA memory controller (72X8300) and video formatter (72X8205) |
| U13 | 8087 socket |
| U16 | National Semiconductor MM58167AN real-time clock |
| U17, U20 | ROM BIOS |
| U18 | NEC µPD765AC diskette controller |
| U19 | 8237A DMA controller |
| U27 | NS8250AV UART |
| J1, J2 | Mouse and keyboard connectors |
| J6 | Riser slot |
| J7, J9 | Power connectors |
| J11 | 44-pin fixed-disk connector |
| J12 | 40-pin diskette connector |
| J13 | Dual 30-pin memory socket |
| Y1, Y2, Y3 | 14.31818, 25.175 and 48.000 MHz oscillators |
| Y4 | 32.768 kHz crystal for the clock |
The riser card (P/N 61X8864 or 61X8910) carries three 8-bit ISA slots and the clock's 3 V lithium cell, soldered at B1.[4] The 8086 reads and writes memory 16 bits at a time in four 125 ns clocks with no wait states; I/O and DMA are 8-bit operations with four wait states.[9]
Model 30 286
[edit | edit source]The 286 planar uses the VLSI VL82CPCAT chipset: ZM2 VL82C100 peripheral controller, ZM3 VL82C102A memory controller, ZM4 VL82C103A address buffer, ZM5 VL82C104 data buffer and ZM6 VL82C101B system controller. ZM9 is a VL16C451 parallel port and UART, ZM18 the 15F6864 VGA controller, ZM19 a µPD765AC-2 diskette controller, ZM33 an 8042 or 8742 keyboard controller, ZM35 the DS1287 clock module and ZM36 the processor. The early planar has a PGA processor socket and two BIOS EPROMs; the later one (FRU 34F0046) has a PLCC socket and a single BIOS EPROM at ZM46. Power arrives at J7 and J14.[8] IBM's 1994 parts list gives one system board FRU for all 286 models, 10G4109.[6]
Memory
[edit | edit source]The Model 30 has 640 KB. The first 128 KB is soldered to the planar as four 64K × 4 and two 64K × 1 chips; the remaining 512 KB is two banks of 256K × 9 modules. All of it is parity checked. If POST finds a fault in the first 128 KB it remaps the rest of memory so the machine can still run at reduced capacity.[9]
The Model 30 286 shipped with 512 KB as two 256 KB memory packs. Two more take it to 1 MB; for 2 MB or 4 MB, all the 256 KB packs come out and two or four 1 MB packs go in, because the two sizes cannot be mixed.[3] IBM's announcement of the E0R lists the 120 ns memory kits as supported and the 150 ns kits as not supported.[7] Memory above the planar is added on adapters such as the PS/2 Multifunction Adapter, to a system total of 16 MB.[3]
Video
[edit | edit source]The Model 30's Multi-Color Graphics Array (MCGA) is on the planar: two gate arrays, 64 KB of video memory, an 8 KB character generator and a 256-entry, 18-bit palette with three 6-bit DACs. It supports all the CGA modes plus 320 × 200 in 256 colours and 640 × 480 in two colours.[9] It works only with IBM's analogue displays; IBM stated that its earlier displays are not compatible.[1] IBM retain tip H094152 adds that the 8086 machines do not support the 8515 and 8516 displays, which show compressed, distorted video on them.[4]
The Model 30 286 has VGA on the planar: 720 × 400 in text mode, 640 × 480 in graphics, 256 colours or 64 shades of grey at a time.[3]
Storage
[edit | edit source]Diskette
[edit | edit source]Power and signals reach the drives through one ribbon cable from the planar; there are no separate drive power connectors.[10] On the 8086 planar's 40-pin diskette connector, pin 38 is +5 V and pin 40 is +12 V.[9] The 8086 machines shipped with 720 KB drives. IBM never sold them with a 1.44 MB drive, but the Model 30 has undocumented high-density support: Sony drives are the ones likely to work, and later planars accept more drives than early ones.[11][10] The Model 30 286 shipped with a 1.44 MB drive, identified by "1.44" on the eject button.[3]
Mitsubishi's MF355C specification describes a brushless DC motor turning the spindle directly at 300 rpm, so drives of that design have no belt.[12] The common fault on PS/2 drives is leaking surface-mount electrolytic capacitors on the drive board; see IBM PS/2 Model 30 Capacitor Replacement Guide.
Fixed disk
[edit | edit source]The Model 30's fixed-disk connector (J11, 44 pins) is not an ST-506, ESDI or IDE interface. IBM describes it as a dedicated I/O channel for "the IBM Personal System/2 20MB Fixed Disk Drive and Controller, or similar attachment". It carries the I/O channel data lines, read and write strobes, reset, I/O CH RDY, IRQ 5 and DMA channel 3, plus a card-select decoded at hex 032x, a "disk installed" line and three address lines that select registers inside the controller. Pins 30 and 32 carry +5 V and pins 40, 42 and 44 carry +12 V.[9] The controller is part of the drive assembly; IBM's announcement describes the 021's drive as a "20MB fixed disk with integrated controller".[1] Only IBM's drives for this interface work, and the drive sits in a caddy.[10]
IBM's parts lists give the 20 MB drive as FRU 6128285 or 61X8929 and the 30 MB drive as 6128279, with a 45 MB drive (92F0016) for the Model 30 286.[6] Retain tip H007157 ties particular drives to particular system boards and versions of Advanced Diagnostics; see the maintenance guide.[4]
Keyboard and pointing device
[edit | edit source]The two 6-pin mini-DIN ports use the same interface logic. On the Model 30, IBM states that the keyboard and pointing device can "plug into either of the two 6-pin connectors at the rear of the system".[9] On the Model 30 286 the keyboard port is marked "1" and the pointing-device port "2" on the back panel.[3] The ports are fused on the planar: Ardent Tool's map of the 8086 planar lists F1 and F2 as the probable mouse and keyboard fuses, with F2 absent on the second Greenock board, and the 286 planar has a single F1.[4][8]
Power supply
[edit | edit source]The Model 30's supply is a 70 W unit that accepts 120 V or 220/240 V AC without a selector switch and is protected by an internal fuse. It shuts down on over-current or under-voltage until the condition is cleared.[9][1]
| Output | Load current | Regulation | Under-voltage sense level |
|---|---|---|---|
| +5 V | 1.5–9.0 A | +5 % / −4 % | +4.5 V |
| −5 V | 0–0.11 A | +10 % / −8 % | −4.3 V |
| +12 V | 0–1.8 A | +5 % / −4 % | +10.8 V |
| −12 V | 0–0.30 A | +10 % / −9 % | −10.2 V |
IBM allocates about 5 A of the +5 V rail to the planar and drives, leaving about 4 A for the three slots. All four rails are bussed to the slots.[9]
The Model 30 286 supply is rated 90 W and has a voltage switch on the rear, which must be set to 100–125 V or 200–240 V before the cord is plugged in. Its under-voltage sense levels are the same as the Model 30's.[3][2] DOS Days notes an extra 4-pin connector on the 286 supply to feed the 16-bit bus.[10] The FRU numbers are 61X8905 for the Model 30 supply and 27F4166 for the Model 30 286.[6]
Pin assignments, measurement limits and the Power Good check are in the maintenance guide.
Clock and battery
[edit | edit source]The Model 30 has a real-time clock: IBM lists a "real-time clock with battery" among the system board functions, at I/O addresses hex 00B0–00BF and 00E0–00EF, sharing IRQ 1 with the keyboard and pointing device.[9] The chip is an MM58167AN at U16, and its 3 V lithium cell is soldered to the riser card, not the planar.[4]
The Model 30 286 uses a Dallas DS1287 clock module with its cell sealed inside, FRU 8509237.[6] IBM's HMR treats it as a plug-in part: it sits in a connector at ZM35 and is refitted with its white dot towards the rear of the system unit.[3] Battery testing and replacement are covered in the maintenance guide and Battery Refurbishment.
Setup and diagnostics
[edit | edit source]Neither machine has a setup program in ROM. Configuration, the date and time, and passwords are set from the Starter Diskette shipped with the system, and diagnostics run from IBM's Advanced Diagnostics diskette.[1][3] Cold-boot these diskettes: a warm boot can give false errors and a false indication that a power-on password is set.[13] With no bootable diskette or fixed disk, pressing F1 at the Insert Diskette icon starts Cassette BASIC from ROM.[3][1]
A forgotten power-on password on the Model 30 286 is cleared by moving the J13 jumper to its other position and leaving it there.[14][3]
Documentation
[edit | edit source]- IBM Personal System/2 Model 30 Technical Reference (January 1987): IBM PS2 Model 30 Technical Reference (January 1987).
- IBM PS/2 Model 30 286 Hardware Maintenance Reference (March 1990): IBM PS2 Model 30 286 Hardware Maintenance Reference.
- Personal System/2 Model 30 286 Guide to Operations (September 1988): IBM PS2 Model 30 286 Guide to Operations.
- IBM Personal System/2 Hardware Maintenance Manual (October 1994), with the Model 30 and 30-286 parts lists: IBM Personal System 2 Hardware Maintenance Manual (S52G-9971-02, October 1994).
- Logic schematics of the 8086 planar (eight sheets, 1991) and the 286 planar P/N 34F0046 (six sheets, 1991), drawn by Maintenance Information Technologies, not IBM: IBM PS2 Model 30 Schematics and File:IBM PS2 Model 30 286 Schematics.pdf.
General maintenance
[edit | edit source]Opening the case, rail checks, the clock battery and IBM's service notices are in IBM PS/2 Model 30 Maintenance Guide.
Troubleshooting
[edit | edit source]Beep codes, POST error groups, the dead-system procedure and IBM's retain tips are in IBM PS/2 Model 30 Troubleshooting Guide.
Capacitor replacement
[edit | edit source]The planar, the power supply and the drive boards are covered in IBM PS/2 Model 30 Capacitor Replacement Guide.
Gallery
[edit | edit source]-
IBM PS/2 Model 30 (8530) -
Model 30 286, front -
Model 30 286 with the cover off -
Model 30 badge -
Model 30 286 badge
References
[edit | edit source]- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 IBM Announcement Letter 187-048, IBM Personal System/2 Model 30, 2 April 1987, text at ardent-tool.com. Models 8530-002 (two 720 KB drives) and 8530-021 (20 MB fixed disk "with integrated controller" and one 720 KB drive), prices US$1,695 and US$2,295, 8086 at 8 MHz with no wait states to memory, 640 KB, MCGA and its modes, "Time-of-day clock with extended life battery", three PC/XT slots, "Universal 70W power supply, with internal sensing, for worldwide usage", the Guide to Operations shipped "with starter diskette", ROM BASIC as the final boot default, and IBM DOS 3.30 as a prerequisite.
- ↑ 2.0 2.1 2.2 2.3 2.4 IBM Announcement Letter 188-145, IBM Personal System/2 Model 30 286 (8530-E21), 13 September 1988, text at ardent-tool.com. 80286 at 10 MHz with one wait state, 512 KB standard with parity, expansion to 1 MB with 0.5 MB kits or 2 MB and 4 MB with 2 MB kits, VGA, 1.44 MB diskette drive, 20 MB fixed disk, "Personal Computer AT, XT/286 bus for adapters", 128 KB ROM with BASIC, US$2,595, 90 W supply at 90–137 or 180–265 V AC "controlled by switch on back", 406 × 397 × 102 mm and 8.6 kg, DOS 3.30 or 4.00 and OS/2 Standard Edition 1.1, and the 8530 286 service publications (Hardware Maintenance Reference Supplement S01F-0234, Hardware Maintenance Service Supplement S01F-0235, Technical Reference S01F-0237).
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 IBM, IBM PS/2 Model 30 286 Hardware Maintenance Reference, S64F-3988-00, March 1990. Hosted on this wiki as IBM PS2 Model 30 286 Hardware Maintenance Reference (PDF). Sections 1.0 (product description, 90 W manually switchable supply), 1.1.2 (power-on password and J13), 1.2.2 (CMOS RAM), 1.2.6 (keyboard connector marked "1", pointing device "2", same interface logic), 2.2 (1.44 MB drives marked "1.44" on the eject button), 3.1 (power supply and under-voltage sense levels), 3.2 (POST), 3.3.1 (memory packs), 4.0 (specifications), 6.14 (1070 clock module), 7.4 (system board locations).
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Louis Ohland, Tomáš Slavotínek et al., "8530 Planar (8086)", Ardent Tool of Capitalism. Designator map of the original planar P/N 61X8823 and the two Greenock planars (P/N 33F4888; FRU 33F8474, P/N 33F4871), with F1 and F2 listed as "Mouse fuse?" and "Keyboard fuse?" and F2 absent on the second Greenock board; the note that reference designators are largely consistent across all 8086 Model 30 and Model 25 planars; the ROM image list; the riser card P/N 61X8864 and 61X8910 with its soldered B1 3 V lithium cell (Panasonic BR-2/3A); and IBM retain tips H007157, H043664, H067282 and H094152.
- ↑ IBM Announcement Letter 188-146, IBM Personal System/2 Model 30 286 (8530-E01), 13 September 1988, text at ardent-tool.com. The E01 as a single-diskette version without a fixed disk, with an optional 20 MB drive (27F4969, feature 4115).
- ↑ 6.0 6.1 6.2 6.3 6.4 IBM, IBM Personal System/2 Hardware Maintenance Manual, S52G-9971-02, October 1994. Hosted on this wiki as IBM Personal System 2 Hardware Maintenance Manual (S52G-9971-02, October 1994) (PDF). Power connector pin assignments for the Models 30 and 30-286, p. 138; Model 30 parts list, p. 228; Model 30-286 parts list, p. 230; PS/2 system specifications table (8530-001 to E41), p. 435.
- ↑ 7.0 7.1 IBM Announcement Letters 189-013, 8530-E2R (24 January 1989), and 189-091, 8530-E0R (6 June 1989), text at ardent-tool.com and ardent-tool.com. Each is identical to the E21 or E01 apart from the 50-key keyboard. 189-091 also states that the 120 ns memory kits (0.5 MB 30F5348, 2 MB 30F5360) are supported and the 150 ns kits (55X3547, 74X7833) are not.
- ↑ 8.0 8.1 8.2 Louis Ohland, Tomáš Slavotínek et al., "8530 286 Planar", Ardent Tool of Capitalism. Designator map of the old (PGA CPU, "P/N 30F9816?") and new (PLCC CPU, FRU 34F0046, P/N 33F8700) planars: F1, J7 and J14 power connectors, J9 and J10 SIMM sockets, J13 password override, ZM2–ZM6 VLSI VL82C100/102A/103A/104/101B, ZM9 VL16C451, ZM18 15F6864 VGA controller, ZM19 µPD765AC-2, ZM33 8042/8742, ZM35 DS1287, ZM36 286-10; the ROM images; the Model 30-286 Starter Disk v1.02; and IBM retain tip H036143.
- ↑ 9.00 9.01 9.02 9.03 9.04 9.05 9.06 9.07 9.08 9.09 IBM, IBM Personal System/2 Model 30 Technical Reference, January 1987. Hosted on this wiki as IBM PS2 Model 30 Technical Reference (January 1987) (PDF). Section 1: general description with five gate arrays and "Real-time clock with battery", p. 1-3; microprocessor and memory timing, p. 1-5; keyboard and pointing device controller, p. 1-9; hardware interrupt listing, Figure 1-9; I/O address map, Figure 1-12; read/write memory, p. 1-22; video subsystem, p. 1-36; diskette drive connector, Figure 1-97, p. 1-105; fixed disk connector, pp. 1-106 and 1-107. Section 3, "Power Supply", pp. 3-3 to 3-6: rating, rail currents, input ranges, regulation, output protection sense levels, power-good signal and connector pin assignments.
- ↑ 10.0 10.1 10.2 10.3 "IBM PS/2 Model 30", DOS Days. The proprietary drive fitting with no Molex connectors, the extra 4-pin connector on the Model 30 286 supply for the 16-bit bus, the fixed-disk interface being neither ESDI nor standard MFM, the drive caddy, the Sony 1.44 MB drive that works in the 8086 machine, and the "1.44MB" eject-button marking.
- ↑ Louis Ohland, William R. Walsh, Tomáš Slavotínek et al., "8525 Planar", Ardent Tool of Capitalism. William Walsh on PS/2 diskette drives ("plan on replacing every one of the surface mounted electrolytic capacitors on the drive's circuit board"), the undocumented 1.44 MB support of the 8086 Model 25 and Model 30 with Sony drives, and the Model 25 8086 using a different power connector from the Model 30 8086.
- ↑ Mitsubishi Electric, 3.5 inch Flexible Disk Drive Standard Specifications, MF355C, UGD-0527A, February 1987. Hosted on this wiki as File:Mitsubishi MF355C 3.5 inch Diskette Drive Specifications (UGD-0527A, Feb 1987).pdf. Section 1.1 (p. 3) and section 2.3, "Rotation Mechanism" (p. 9): brushless DC direct-drive spindle motor at 300 rpm.
- ↑ "PS/2 Error Codes", Ardent Tool of Capitalism, with the code tables for 160–199 and 300–999. Beep codes, the warm-boot warning, the multiple-error rule, the dead-system procedure, and the battery, keyboard and diskette code groups with IBM's FRU order.
- ↑ IBM, Personal System/2 Model 30 286 Guide to Operations, first edition, September 1988. Hosted on this wiki as IBM PS2 Model 30 286 Guide to Operations (PDF). "Cover Removal", p. 2-2; Starter Diskette, Section 1; "Power-on Password Reset", pp. 3-4 and 3-5.
Related pages
[edit | edit source]- IBM PS/2 Model 30 Maintenance Guide
- IBM PS/2 Model 30 Troubleshooting Guide
- IBM PS/2 Model 30 Capacitor Replacement Guide
- IBM PS/2 Model 25, the all-in-one relative
- IBM PS/2 Model 50, IBM PS/2 Model 60 and IBM PS/2 Model 80
- IBM PC XT (5160)