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- Path: sparky!uunet!news.univie.ac.at!alijku11!aci.cvut.cs!patrol
- organization: Czech Technical University - Univ. Regional Comp. Center
- Date: Sun, 24 Jan 1993 07:31:49 MET
- From: Pavel Troller <PATROL@ACI.CVUT.CS>
- Message-ID: <93024.073149PATROL@ACI.CVUT.CS>
- Newsgroups: comp.sys.amiga.hardware
- Subject: Chip RAM extremely slow with GVP A530
- Lines: 38
-
- Hi netters,
- I bought a new A530 Turbo Harddisk last week. Suddenly it is fitted
- only with a 1Meg of 32bit RAM, because my local dealer hasn't expansion SIMMS
- stock. Formerly I had GVP Series 2 Harddisk with 4Megs of expansion RAM, so
- my system has relatively expensive memory requirements. First time I booted,
- I tried SysInfo to show me the wonder, but I was surprised: 0.78 of standard
- A500, 0.30 Chip vs A3000.
- I wrote a short program in assembler, which simply counts to zero from
- $1000000 and then returns. Its results are shown:
- Memory Type Inst Cache Status Time to run
- 32bit Enabled 3.5 s
- Chip Enabled 3.5 s
- 32bit Disabled 9 s
- Chip Disabled 120 s :-(
- With motherboard CPU:
- Chip not available 49 s
-
- I know that with asynchronous bus operations there is a need to syn-
- chronize bus cycles of 40Mhz '030 with 7Mhz of motherboard; but I didn't
- supposed that it will be so drastic. It also means that without the basic
- 1Meg of 32bit RAM the system is unusable!
- For the completeness, basic data about my system:
- A500+, motherboard CPU: 68010, 2 Megs of Chip RAM
- GVP A530, 68EC030 on 40Mhz, 120MB Maxtor drive
- Of course, the test routine was written with the respect to NOT enable
- the loop mode of 68010 for correct results.
- I don't know if it is a general feature of A530 or if the hardware bug/
- incompatibility occured especially on my case.
- Thanks in advance,
-
- Pavel Troller
- Internet: PATROL@ACI.CVUT.CS
- Bitnet: PATROL@CSPUNI12
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