deathshadow
Veteran Member
- Joined
- Jan 4, 2011
- Messages
- 1,378
This occurred to me in the magiduck thread, thought I'd come right out and ask.
It seems like every Tandy 1000 that had a 286 processor -- like the RLX -- only had 8 bit slots and lacked the second IRQ and DMA chips to be a true AT class machine; just like how they were limited to 384k of extended memory with zero capacity to go past that. (since you can't add protected mode extended memory via 8 bit slots). This made them "more XT" than the IBM XT/286.
The first unit I can find information on that even had 16 bit slots was the RSX, which had a 386SX-16 in it...
Were there any 286 based Tandy's that actually were AT's? If there were such machines, did they have the tandy sound at a different port, or is that unique to the RSX?
I'm really not familiar with the 2500 line for example, so I'd be interested to hear about those. Any information software-wise on detecting if that second DMA controller is present and if Tandy sound is present at a different port would be appreciated.
Whilst I'm starting to be glad that for Paku 2.0 and it's associated sound engine (that's going into three or four other games) I've allowed port overrides from the command line on all devices, I'd still like to have the best in autodetection if at all possible; and that means knowing more about all the various devices that had PCJr/Tandy/PS1 audio. I JUST got my PS/1 audio autodetecting properly (at least it works on one person's Model 2121 and in DOSBox) so now I want to take a deeper look at the later Tandy models that moved the base port.
It seems like every Tandy 1000 that had a 286 processor -- like the RLX -- only had 8 bit slots and lacked the second IRQ and DMA chips to be a true AT class machine; just like how they were limited to 384k of extended memory with zero capacity to go past that. (since you can't add protected mode extended memory via 8 bit slots). This made them "more XT" than the IBM XT/286.
The first unit I can find information on that even had 16 bit slots was the RSX, which had a 386SX-16 in it...
Were there any 286 based Tandy's that actually were AT's? If there were such machines, did they have the tandy sound at a different port, or is that unique to the RSX?
I'm really not familiar with the 2500 line for example, so I'd be interested to hear about those. Any information software-wise on detecting if that second DMA controller is present and if Tandy sound is present at a different port would be appreciated.
Whilst I'm starting to be glad that for Paku 2.0 and it's associated sound engine (that's going into three or four other games) I've allowed port overrides from the command line on all devices, I'd still like to have the best in autodetection if at all possible; and that means knowing more about all the various devices that had PCJr/Tandy/PS1 audio. I JUST got my PS/1 audio autodetecting properly (at least it works on one person's Model 2121 and in DOSBox) so now I want to take a deeper look at the later Tandy models that moved the base port.