jasa1063
Experienced Member
I have recently posted about getting a Tandy 286 Express Accelerator and putting in my Tandy 1000A (Model 25-1002) just a short while ago:
I have also written previously on my attempt to recreate a Tandy 1000 SX with a Tandy 286 Express Accelerator and how that did not work out the way I planned:
The urge was just too strong to put that Tandy 286 Express Accelerator in my Tandy 1000 SX instead of the Tandy 1000A, so that is exactly what I did, but then I started having lockup problems. Now I know the accelerator works, because I had it running in my Tandy 1000A computer with no issues. My first suspect was memory. The computer came with 640K so I did not even give the memory a 2nd thought when it was running without the accelerator, but I took a closer look and then discovered whoever upgraded this Tandy 1000 SX had used a mixture of different 256Kx1 dram chips with various speed ratings. I had a few issues previously with the Tandy 1000 SX with an NEC V20 CPU, but I guess putting in a 286 accelerator pushed the memory too hard. I ordered a completed memory replacement of 100ns memory consisting of 4 64kx4 and 16 256kx1 dram chips. 100ns memory is probably over kill, but at $1 per chip I wasn't going to argue with that. I sprayed each dram socket with DeoxIT and swapped out the memory. I am pleased to say that I have no more lockup issues and the computer is working as expected.
This Tandy 1000 SX is different than my old one because that one never had a XT-IDE with Compact Flash storage, upper memory or an EMS board, such is progress. In the final analysis, I did recreate my computer from 30+ years ago and that is all that matters to me.
I have also written previously on my attempt to recreate a Tandy 1000 SX with a Tandy 286 Express Accelerator and how that did not work out the way I planned:
The urge was just too strong to put that Tandy 286 Express Accelerator in my Tandy 1000 SX instead of the Tandy 1000A, so that is exactly what I did, but then I started having lockup problems. Now I know the accelerator works, because I had it running in my Tandy 1000A computer with no issues. My first suspect was memory. The computer came with 640K so I did not even give the memory a 2nd thought when it was running without the accelerator, but I took a closer look and then discovered whoever upgraded this Tandy 1000 SX had used a mixture of different 256Kx1 dram chips with various speed ratings. I had a few issues previously with the Tandy 1000 SX with an NEC V20 CPU, but I guess putting in a 286 accelerator pushed the memory too hard. I ordered a completed memory replacement of 100ns memory consisting of 4 64kx4 and 16 256kx1 dram chips. 100ns memory is probably over kill, but at $1 per chip I wasn't going to argue with that. I sprayed each dram socket with DeoxIT and swapped out the memory. I am pleased to say that I have no more lockup issues and the computer is working as expected.
This Tandy 1000 SX is different than my old one because that one never had a XT-IDE with Compact Flash storage, upper memory or an EMS board, such is progress. In the final analysis, I did recreate my computer from 30+ years ago and that is all that matters to me.
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