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blog:pentium_pc_digipos_pro [2023/01/13 10:50] – john | blog:pentium_pc_digipos_pro [2023/01/20 09:54] – [Benchmarks] john | ||
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====== Digipos Pro ====== | ====== Digipos Pro ====== | ||
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+ | This is a point-of-sale system which I bought as non-working in December 2022. It was listed as powering on, but displayed no output and output a number of beep error codes. The problem turned out to be relatively easy to fix - the included single 16MB SIMM module was either faulty or incompatible and after replacing it with two 32MB EDO SIMM's from my spares it powered on correctly. | ||
Case Pictures | Case Pictures | ||
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=== Current Specification === | === Current Specification === | ||
- | * Processor: IDT Winchip C6 200MHz | + | * Processor: |
* Motherboard: | * Motherboard: | ||
* Video: S3 Virge/DX 4MB (PCI) | * Video: S3 Virge/DX 4MB (PCI) | ||
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* Storage: 3.5" bay mounted Compact Flash reader | * Storage: 3.5" bay mounted Compact Flash reader | ||
+ | ===== Faults & Fixes ===== | ||
+ | |||
+ | === Memory === | ||
+ | |||
+ | As I said in the introduction, | ||
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+ | === Keyboard === | ||
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+ | After powering on the system for the first time I had ongoing issues with the keyboard not working, my KVM not detecting a keyboard, and, when the keyboard did work, the key repeat feature would not work. I also had trouble getting several types of PS/2 keyboard recognised (a basic Dell keyboard wouldn' | ||
+ | |||
+ | Eventually I started poking about near the AT connector on the motherboard and notice what appeared to be the typical PS/2 keyboard fuse: | ||
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+ | {{: | ||
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+ | Testing that for continuity I got really bizarre resistance readings, so I decided to bypass it - at that point the keyboard started to work properly. I'm not sure what failure mode the fuse was in, but it certainly hadn't ' | ||
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+ | {{: | ||
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+ | === Noisy Fans === | ||
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+ | The system uses a 40x40x10mm fan over the custom PSU as well as a 50x50x10mm fan over the heatsink/ | ||
+ | |||
+ | === Removal of Custom PSU === | ||
+ | |||
+ | No standard AT/ATX PSU in this thing - it was entirely bespoke, with a bespoke motherboard header. I decided to remove the 25+ year old PSU and replace it with a modern, solid state, cool-running PicoPSU instead: | ||
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+ | {{: | ||
===== Resources ===== | ===== Resources ===== | ||
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===== Benchmarks ===== | ===== Benchmarks ===== | ||
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+ | ^ ^ ^ Configuration 1 ^ Configuration 2 ^ Configuration 3 ^ Configuration 4 ^ | ||
+ | | | | C6 200MHz | ||
+ | | | | 2x32MB EDO | 2x32MB EDO | 2x32MB EDO | 2x32MB EDO | | ||
+ | | | | PCI CL-GD7548 | ||
+ | |Test | Metric | ||
+ | |Norton | ||
+ | |Comptest | ||
+ | |Comptest | ||
+ | |Comptest | ||
+ | |Comptest | ||
+ | |Comptest | ||
+ | |Comptest | ||
+ | |Comptest | ||
+ | |Landmark | ||
+ | |Landmark | ||
+ | |Landmark | ||
+ | |Speedsys | ||
+ | |Speedsys | ||
+ | |Speedsys | ||
+ | |Speedsys | ||
+ | |Speedsys | ||
+ | |Wolfenstein 3D | FPS | 94.9 FPS | 133.2 FPS | 134.3 FPS | 133.9 FPS | | ||
+ | |DOOM | Low Detail | ||
+ | |DOOM | High Detail | ||
+ | |Quake | ||
+ | |Quake | ||
+ | |Quake | ||
+ | |3D Bench | 1.0c | 100.3 FPS | 157.2 FPS | 158.7 FPS | 156.8 FPS | | ||
+ | |PC Player | Low Res | 33.9 FPS | 38.4 FPS | 38.4 FPS | 37.5 FPS | | ||
+ | |PC Player | High Res | 12.5 FPS | 16.2 FPS | 16.2 FPS | 16 FPS | | ||
+ | |||
+ | Comparison of the VGA benchmarks side by side for the IDT Winchip C6 configurations: | ||
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+ | {{: | ||
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+ | |||
+ | ==== Winchip 200 vs Pentium MMX 200 Comparison ==== | ||
+ | |||
+ | Added a comparison with the replacement Pentium 200 MMX processor: | ||
+ | |||
+ | {{: |