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IBM 5160 - Significant Differences to the IBM 5150

modem7

modem7

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I have added a web page to my web site.
That page is titled, "IBM 5160 - Significant Differences to the IBM 5150".
That page is [here]. Note the keyword of "significant".

The final section on that page is about the change in reserved I/O ranges. If you have the required level of technical knowledge, and you think that I have got part (or all) of that section wrong, then please let me know.
 
It looks good, and that's most of the differences from a practical standpoint.

A signifficant difference on a technical level is the onboard memory system. The onboard memory in the XT can be configured to various different RAM chips, ranging from (+5V only) 16Kx1b chips to 256Kx1b chips, where in a 5150 the banks are fixed to a given memory chip. Most of the jumpers on the board relate to this flexibility, except E0 (which removes the BIOS from memory) and E5 (which provides CPU controll over the keyboard data-line).
 
modem7 said:
I have added a web page to my web site.
Click to expand...

Thank you very much for this information! This explains why a 16-bit IDE controller won't work in a 5150 (the IDE controller's I/O address range 1F0-1F7 is inside the motherboards reserved range).
 
Krille said:
Thank you very much for this information! This explains why a 16-bit IDE controller won't work in a 5150 (the IDE controller's I/O address range 1F0-1F7 is inside the motherboards reserved range).
Click to expand...
It sounds like you're saying that it will work in a 5160. Is that correct?
 
Stone said:
It sounds like you're saying that it will work in a 5160. Is that correct?
Click to expand...

Yes, if selecting "16-bit ISA IDE in 8-bit mode" as the IDE controller in XTIDECFG. And you will need to use an ATA-2 compliant drive (CF card, microdrive and some harddrives).
 
Krille said:
Thank you very much for this information! This explains why a 16-bit IDE controller won't work in a 5150 (the IDE controller's I/O address range 1F0-1F7 is inside the motherboards reserved range).
Click to expand...

Good spot! I happened to notice the hardware reasons behind the reserved IO port ranges in these machines just last week whilst looking at the differences between the DMA logic in the two machines, but never made the connection to 16-bit IDE adapters. Presumably any controller that can jumpered for 'secondary controller' port range should be OK mind.
 
modem7 said:
I have added a web page to my web site....
Click to expand...

Excellent, My thanks also for this information.

Krille said:
Thank you very much for this information! This explains why a 16-bit IDE controller won't work in a 5150 (the IDE controller's I/O address range 1F0-1F7 is inside the motherboards reserved range).
Click to expand...

Now my curiosity is well and truly satisfied :)
 
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