VPC-AHDC is designed to facilitate the troubleshooting and repair of PC/AT-286/386/486/586 and compatible boards for PC Bus, Bus Controller, CPU, Clock Circuit, BIOS, Buffers, Latches and Display Card etc. problems. The systems that are completely Dead can be brought to working condition with this card.
The user can run the program in single step, check point latch fuction, auto Single Step, manual mode latch, free run mode at any desired address. The status of the currently assessed instruction can be monitored on Ten LED’s are: RESET, SMEMW, SMEMR, IOW, IOR, MEMR, MEMW, AEN and REF. This facility of single stepping and check point latch a live analysis of the BIOS listing becomes very handy for the user to debug and localise the hardware problem of the system.
VPC-AHDC can trace the CPU at any required memory location and monitor it.The user can plug in any slot of the mother-board.
VPC-AHDC is a small board that fits easily into a repair briefcase to be carried on site for simple and rapid problem determination.
| FEATURES |
- Monitor system BIOS POST codes.
- Use Single step or Trace mode to debug running programs.
- Monitor the contents of I/O port.
- Monitor the system address and data buses.
- Halt the system whenever the pre-defined checkpoint matched.
- Source signal for LATCH is selectable .
- ISA-Bus address/data signal can be displayed when LATCHed.
- ISA-BUS: A0-A23 and D0-D15
- Single step and Checkpoint LATCH functions.
- Support automatic and manual mode LATCH modes.
- LATCH mode and FreeRun mode can be toggled at any time.
- Signal Step and Checkpoint LATCH can be toggled at any time.
- LED indicator for RESET, /SMEMW, /SMEMR, /IOW, /IOW, /MEMR, /MEMW and AEN/REF .
- Checkpoint are set to component itself or special CPU cycle, not I/O address, improved efficiency and easy-to-use.
- Support the following checkpoints:
- ROM BIOS
- Refresh Cycle (ISA-Bus)
- INTA(8259)
- DMA Transfer Cycle
- DMA(8237)
- RS-232 port
- 74612
- Printer port
- Timer(8253)
- FDC/HDC card Cycle
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