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Vintage Computers Any vintage computer systems, calculators, video games etc., but with an emphasis on 1980s and earlier equipment.

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Old 15th Apr 2019, 11:53 pm   #61
Timbucus
Triode
 
Join Date: Mar 2019
Location: Barry, Vale of Glamorgan, Wales, UK.
Posts: 30
Default Re: MK14 programming interface - MK2

Hmmm - it is the same brand SGS 74LS365BI also marked 9844I
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Old 16th Apr 2019, 12:09 am   #62
SiriusHardware
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Location: Newcastle, Tyne and Wear, UK.
Posts: 2,671
Default Re: MK14 programming interface - MK2

To be exact, this one is marked SGS 74LS365ABI 98441 - I think you probably just missed out the 'A' after the '5' on the one you have there.

Anyway, you'll be able to try it for yourself, I will get it on the way back to you ASAP.
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Old 16th Apr 2019, 12:15 am   #63
Timbucus
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Default Re: MK14 programming interface - MK2

No actually there is no A so maybe a look at the data sheet is needed or these are re topped devices with a printing error... I have 5 more in transit towards the VDU project
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Old 16th Apr 2019, 12:27 am   #64
SiriusHardware
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Default Re: MK14 programming interface - MK2

It does seem slightly suspicious that two devices would have different main device suffixes and the same batch number.

Your mention of 365s being used on the VDU made me leap across to look at mine to see if it had alternative 365s in it that I could try in the MK14 - but of course the devices in the IC9 / IC10 positions in my VDU are... 80L95s.
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Old 16th Apr 2019, 1:06 am   #65
Timbucus
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Join Date: Mar 2019
Location: Barry, Vale of Glamorgan, Wales, UK.
Posts: 30
Default Re: MK14 programming interface - MK2

Well tried finding the relevant datasheets but, no joy - the general SGS sheets on 74LS series say the suffix should be B for a DIP - I wonder if it is a different manufacturer - maybe a CMOS part or an original 74365 non schotty even. TI parts had an A after them. I am going with a relabelled chip of unknown exact design due to your observation on the BATCH number...
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