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980700 - BIOS Modification (Type-A, Type-B, and Other Models)
The story is a bit long so let's make the long story short. I got
reprogrammed BIOS ROMs for Type-A and Type-B complex. Type-A, the fastest
complex among all of PS/55 complexes, got boosted further with 80MHz OSC and a
BIOS ROM. Free from 102 error, with an AMD 5x86-133 ADZ on an interposer,
5580-"N" with BooDoo magic'ed Type-A run flawlessly in 160MHz inner speed.
"Nancy the second" also had a modified ROM in it and run in 160MHz speed too.
Note: 5551-N uses Flat Packaging Write-One-Time
PROM, a tiny SOJ chip. Chip No. is HN 27C301AFP-12 and it belongs to the
P571000 series. It's hard to find 27C301 (and other P57C1000 equivalents) these
days. P571001 and it's equivalents are common and easy to get. In order to use
1001-type ROM instead of 1000-type, soldering rework is needed to exchange
connection of copper traces to pin #2 and pin #24.
| CPU |
WindSock |
HDBENCH |
ETDIAG |
| Model |
Bus Clock |
Core Clock |
CPU |
Float |
Integer |
Dhrystone |
| 5580 with DX2-66 Upgrade Type-A Complex |
| Intel 486DX4-100 x3 |
33 MHz |
99 MHz |
814 |
|
|
37878 |
| AMD 5x86 x4 |
33 MHz |
133 MHz |
957 |
3743 |
5645 |
41666 |
| AMD 5x86 x4 |
40 MHz |
160 MHz |
1162 |
4497 |
6762 |
51020 |
| 5551-NAB |
| Cyrix 5x86 x3 |
33 MHz |
99 MHz |
857 |
3130 |
4693 |
|
| Cyrix 5x86 x3 |
40 MHz |
120 MHz |
1017 |
3752 |
5643 |
|
| AMD 5x86 x4 |
40 MHz |
160 MHz |
1160 |
4155 |
6695 |
51020 |
| AMD 5x86 x4 |
42 MHz |
168 MHz |
1205 |
4490 |
6762 |
|
CPU & Memory Test Under PFM486 (DOS program)
1) 5551-N 40MHz
Performance of 486-PC Ver1.77 (C)1992-1994 DysanKeihin
H----------------------------------------------------H
| i486Dx Frequency = 160.26 MHz Machine:AT v1.77|
| CPUID Results = AuthenticAMD Fam 4 Mdl14 Stp 4 |
| Ecache Read Time = 47 ns/dword ( 6.3wait, 85mb/s)|
| Ecache Write Time = 80 ns/dword (10.9wait, 50mb/s)|
| Memory Read Time = 47 ns/dword ( 6.3wait, 85mb/s)|
| Memory Write Time = 81 ns/dword (11.1wait, 49mb/s)|
H----------------------------------------------------H
2) 5551-N Original 33MHz
Performance of 486-PC Ver1.77h(C)1992-1995 DysanKeihin
H----------------------------------------------------H
| i486DX Frequency = 133.13 MHz Machine:AT v1.77h|
| CPUID Results = AuthenticAMD Fam 4 Mdl14 Stp 4 |
| Ecache Read Time = 57 ns/dword ( 6.4wait, 70mb/s)|
| Ecache Write Time = 96 ns/dword (10.8wait, 42mb/s)|
| Memory Read Time = 57 ns/dword ( 6.4wait, 70mb/s)|
| Memory Write Time = 96 ns/dword (10.8wait, 42mb/s)|
H----------------------------------------------------H
3) 5580-Yx With Souped up Type-A
Performance of 486-PC Ver1.77h(C)1992-1995 DysanKeihin
H----------------------------------------------------H
| i486DX Frequency = 160.26 MHz Machine:AT v1.77h|
| CPUID Result = AuthenticAMD Fam 4 Mdl14 STP 4 |
| Ecache Read Time = 47 ns/dword ( 6.3wait, 85mb/s)|
| Ecache Write Time = 80 ns/dword (10.9wait, 50mb/s)|
| Memory Read Time = 47 ns/dword ( 6.3wait, 85mb/s)|
| Memory Write Time = 80 ns/dword (10.9wait, 50mb/s)|
H----------------------------------------------------H
4) 8595-J Type-3
Performance of 486-PC Ver1.77 (C)1992-1994 DysanKeihin
H----------------------------------------------------H
| i486Dx Frequency = 150.00 MHz Machine:AT v1.77|
| CPUID Results = AuthenticAMD Fam 4 Mdl 8 Stp 4 |
| Ecache Read Time = 26 ns/dword ( 2.6wait,154mb/s)|
| Ecache Write Time = 179 ns/dword (24.7wait, 22mb/s)|
| Memory Read Time = 122 ns/dword (17.0wait, 33mb/s)|
| Memory Write Time = 179 ns/dword (24.7wait, 22mb/s)|
H----------------------------------------------------H
Wait! Oh yeah wait a minute Mr.Postman. Wait! Oh No...
5) FYI 9595 Type-4 N Complex
33.333MHz
Performance of 486-PC Ver1.77 (C)1992-1994 DysanKeihin
H----------------------------------------------------H
| i486Dx Frequency = 66.61 MHz Machine:AT v1.77|
| Ecache Read Time = 38 ns/dword ( 1.3wait,105mb/s)|
| Ecache Write Time = 60 ns/dword ( 2.0wait, 67mb/s)|
| Memory Read Time = 134 ns/dword ( 7.7wait, 30mb/s)|
| Memory Write Time = 60 ns/dword ( 2.0wait, 67mb/s)|
H----------------------------------------------------H
40.0MHz
Performance of 486-PC Ver1.77 (C)1992-1994 DysanKeihin
H----------------------------------------------------H
| i486Dx Frequency = 79.96 MHz Machine:AT v1.77|
| Ecache Read Time = 31 ns/dword ( 1.2wait,129mb/s)|
| Ecache Write Time = 50 ns/dword ( 2.0wait, 80mb/s)|
| Memory Read Time = 126 ns/dword ( 8.8wait, 32mb/s)|
| Memory Write Time = 50 ns/dword ( 2.0wait, 80mb/s)|
H----------------------------------------------------H
CPUID results were erroneously deleted. But it was a stock DX2-66 with a
gold heat sink loaded on my stock N complex.
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