Brand: Apricot
Category: Computer
Document Type: Manual
Language: EN
Manual for LS Pro
Uploaded: Nov. 21, 2025, 7:07 p.m.
Manual Publish Date: 1993-01-01
Introduction
The Apricot LS Pro family is a range of ultra-compact IBM compatible computers designed for use as personal computers, network workstations, or high-resolution graphics workstations. Key features include an 80386SX or 486SLC microprocessor, expandable RAM (2 to 16 Mbytes), IBM compatible serial and parallel ports, Ethernet port, optional Token-Ring port, PS/2 mouse port, on-board floppy disk controller and hard disk connector, full IBM compatibility, on-board VGA with high-resolution capabilities, internal power supply, LOC Technology security, and a Windows 3.1 compatible Business Audio subsystem.
System Unit Components
- System Unit: Houses the processor, memory, disk drives, power supply, security circuitry, and various interfaces.
- Keyboard: Full QWERTY layout with numeric keypad and editing keys, compatible with IBM AT enhanced keyboard. Connects via a PS/2 style miniature DIN connector.
- Monitors: Supports VGA, SVGA, and EVGA monitors for various resolutions.
- Expansion: RAM can be expanded using SIMMs. A socket for an 80387SX coprocessor is available.
Troubleshooting and error codes
| Beep sequence | Error |
|---|---|
| 1-1-3 | CMOS RAM read/write test failure |
| 1-1-4 | BIOS ROM checksum failure |
| 1-2-1 | Programmable interval timer failure |
| 1-2-2 | DMA initialisation failure |
| 1-2-3 | DMA page register read/write test failure |
| 1-3-1 | RAM refresh verification failure |
| 1-3-3 | 1st 64k RAM data line failure (multibit) |
| 1-3-4 | 1st 64k RAM data odd/even logic failure |
| 1-4-1 | 1st 64k RAM address line failure |
| 1-4-2 | 1st 64k RAM parity failure |
| 1-4-3 | Fail-safe timer test in progress |
| 1-4-4 | Software NMI port test in progress |
| 2-1-1 | 1st 64k RAM data line failure (bit 0) |
| 2-1-2 | 1st 64k RAM data line failure (bit 1) |
| 2-1-3 | 1st 64k RAM data line failure (bit 2) |
| 2-1-4 | 1st 64k RAM data line failure (bit 3) |
| 2-2-1 | 1st 64k RAM data line failure (bit 4) |
| 2-2-2 | 1st 64k RAM data line failure (bit 5) |
| 2-2-3 | 1st 64k RAM data line failure (bit 6) |
| 2-2-4 | 1st 64k RAM data line failure (bit 7) |
| 2-3-1 | 1st 64k RAM data line failure (bit 8) |
| 2-3-2 | 1st 64k RAM data line failure (bit 9) |
| 2-3-3 | 1st 64k RAM data line failure (bit A) |
| 2-3-4 | 1st 64k RAM data line failure (bit B) |
| 2-4-1 | 1st 64k RAM data line failure (bit C) |
| 2-4-2 | 1st 64k RAM data line failure (bit D) |
| 2-4-3 | 1st 64k RAM data line failure (bit E) |
| 2-4-4 | 1st 64k RAM data line failure (bit F) |
| 3-1-1 | Slave DMA register failure |
| 3-1-2 | Master DMA register failure |
| 3-1-3 | Master interrupt mask register failure |
| 3-1-4 | Slave interrupt mask register failure |
| 3-2-4 | Keyboard controller failure |
| 3-3-4 | Screen memory failure |
| 3-4-1 | Screen initialisation failure |
| 3-4-2 | Screen retrace test failure |
| 1-2 | Old video adapter failed |
| 1-3 | Checksum failure/DAC failure/RAM error |