ACA1231
ACA1231 is an accelerator for the A1200 computer. This was an OEM product exclusively made for Vesalia and to the specifications of our customer Vesalia. All support questions should be directed to our customer. We normally don't provide direct support for OEM products. Sionce Vesalia is out of business now, we provide limited support in our support forum on a voluntary basis - feel free to donate a little for our efforts.
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Processor
ACA1231 cards are based on the Motorola 68030FN16 processor (the SMT version). These processors were provided by the project partner for this accelerator Vesalia. The CPUs were NOT run through the quality control system of individual Computers. There are three versions:
68030 clocked at 41,666MHz
68EC030 clocked at 41,666MHz
68030 clocked at 25MHz
Memory
All ACA1231 cards come with 64MBytes fastmem pre-installed. For OS3.0 users, these cards have 1MByte autoconfiguring memory only. ACAtune will add 62MBytes of memory to the system manually on start-up. For Kickstart version 3.1 or higher, the memory is detected and added automatically by the OS. Please note that the special memory organization of the ACA1231 always reserves 1MByte for the Fastrom option, which cannot be used as normal fastmem. Since the Z2 memory area remains unused, the card is 100% PCMCIA compatible.
manuals
The ACA1231 was first delivered without a cooler, and it quickly turned out that some CPUs would not work reliably with an unlucky combination of power supply and temperature. Since we could not make out any rules about which CPUs are affected, we decided to send a free cooler to every customer and always deliver new cards with a cooler. So the first customers were sent the cooler in a separate parcel with screws and a thermal pad, which was held in place with an original Lisa chip (we had some excess of them back in the days). These shipments had their own instructions.
German instruction sheet for CPU cooler
English instruction sheet for CPU cooler
available ACAtune options
ACA1231 only supports a very limited number of ACAtune options. Tuning options like Z2 options, fastchip and cacheing of areas that should not be cached under normal conditions have been removed for stability reasons. All access speeds have been optimized for the highest possible safe speeds.
