rietveld Posted December 27, 2020 Share Posted December 27, 2020 Does the new MIB board use a 24 or 28 pin Boot EPROM? Can i use a 8k EPROM and just burn the 4k .BIN twice? Quote Link to comment Share on other sites More sharing options...
Tekman Posted December 27, 2020 Share Posted December 27, 2020 The MIB238 can use both 24 or 28 pin E/PROMS depending on jumper configuration. Yes, you can double your 4K image if you only have a 8K E/PROM with the correct jumper setting. MIB238 Jumper Settings: 1-2 - Disables Printer port 3-4 - 2764 PROM ( 8K) 8,192 5-6 - 27256 PROM ( 32K) 32,768 7-8 - 2732 PROM ( 4K) 4,096 9-10 - 27128 PROM ( 16K) 16,384 For a 4K you need to use 27C32 E/PROM and jumper setting 7-8 For a 8K you need to use a 27C64 E/PROM and double your 4K image and use setting 3-4 Simple way to combine images: Windows: copy /b rom4k.rom + rom4k.rom romt8k.rom Linux: cat rom4k.rom rom4k.rom > rom8k.rom Quote Link to comment Share on other sites More sharing options...
rietveld Posted December 27, 2020 Author Share Posted December 27, 2020 Thanks. I am going to burn an EPROM to see if I like the hard drive AUTO booting. Quote Link to comment Share on other sites More sharing options...
rietveld Posted January 6, 2021 Author Share Posted January 6, 2021 On 12/27/2020 at 3:43 PM, Tekman said: The MIB238 can use both 24 or 28 pin E/PROMS depending on jumper configuration. Yes, you can double your 4K image if you only have a 8K E/PROM with the correct jumper setting. MIB238 Jumper Settings: 1-2 - Disables Printer port 3-4 - 2764 PROM ( 8K) 8,192 5-6 - 27256 PROM ( 32K) 32,768 7-8 - 2732 PROM ( 4K) 4,096 9-10 - 27128 PROM ( 16K) 16,384 For a 4K you need to use 27C32 E/PROM and jumper setting 7-8 For a 8K you need to use a 27C64 E/PROM and double your 4K image and use setting 3-4 Simple way to combine images: Windows: copy /b rom4k.rom + rom4k.rom romt8k.rom Linux: cat rom4k.rom rom4k.rom > rom8k.rom I burned a 8k rom by doubling the 4k bin file. works perfect. thanks Quote Link to comment Share on other sites More sharing options...
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