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Old 8th Mar 2021, 9:46 pm   #27
Timbucus
Octode
 
Join Date: Mar 2019
Location: Barry, Vale of Glamorgan, Wales, UK.
Posts: 1,362
Default Re: The Transam Triton Personal Computer

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Originally Posted by GeraldSommariva View Post
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Originally Posted by Timbucus View Post
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Originally Posted by SiriusHardware View Post
One thing I notice is that the EPROMs all appear to have 16-bit hex checksums written on the labels, which will be helpful if you get to the point of needing to know if they are still OK.
Yes Ian and I were just chatting to check if they are the same as the known ones as there are a couple of 7.2 variants. The three that we do not have are the FAST VDU (CS=5D82? damn the lo res pics), the BASIC P?? (no checksum) and obviously TRAP whose checksum I cannot read.
The checksum on the Basic is 2CA8 and the checksum on the TRAP is F86B are these the know ones for the Basic / TRAP ?

I am working towards getting a hex dump of these EPROMS and see if they work, I have the Triton emulator written by Robin Stuart up and running on a Raspberry PI 3 and it works well.
That is great news that you managed to read them and they still match the checksums on them. My 7.2 BASIC is #34F8 so very different. As nobody has the TRAP the checksum is unknown.
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