gerrydoire
Veteran Member
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- Aug 25, 2008
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Did IBM ever release a Mouse for this Card: IBM 33F4461 8525 Bus Mouse Card 8-Bit.
I think that the final bus mouse releases were actually PS/2 port adapters on a card instead of all the specialized bus mouse ports from before.
How about plugging a PS/2 mouse into a serial port with an adapter?
IBM put PS/2 ports into the XT class PS/2 Model 25 and 30 so others could have done it as well.
The Tandy 1000RL is also an XT class machine (9.54 MHz 8086) with PS/2 mouse and keyboard ports.
Do these machines have the 2nd 8259 IRQ controller on the motherboard? That would solve the IRQ 12 "problem".
IBM put PS/2 ports into the XT class PS/2 Model 25 and 30 so others could have done it as well.
There's a reason I just use Serial mice... It's why my 'weapon of choice' -- the original Logitech Trackman Marble -- is one of those wonderful units that's got a PS/2 port, but also works with (and originally came with) the PS/2 to Serial connectors.
Though I do often wish the modern equivalent -- the wireless M570, had more options than just USB.
Back in the day I wondered just what the devil you even needed a proprietary port and/or card for on something as simple as a mouse -- what with multi I/O cards being a dime a dozen and four standard COM ports available... Hell, I don't think I even started using PS/2 mice on PS/2 ports until they started integrating it into motherboards on clones (so... '97-ish?) since prior to that nothing I owned even had the port.
No, and in fact the addresses used by the Tandy sound chip conflicted with those that would be used by the second IRQ controller, which is why the 286-based Tandy 1000 models still only had 8-bit ISA slots, and were not considered to be AT-class machines. When Tandy finally added 16-bit ISA slots to the 386SX-based 1000RSX, they moved the sound chip to a different address range, which broke compatibility with a lot of existing Tandy software.
One web post claims that the PS/2 mouse on the 1000RL uses IRQ 3, but I'm unable to confirm that. Norton Utilities, PC Tools, and Quarterdeck Manifest all don't identify which IRQ the mouse is using, and MSD locks up when trying to open the IRQ Status screen.
Despite having a Mini-DIN connector this card (http://www.recycledgoods.com/products/IBM-33F4461-8525-Bus-Mouse-Card-8-Bit-ISA-Vintage.html) doesn't look like a mouse interface card at all
1. It is way too big and it has way too many ICs for a mouse interface, even for 80's.
2. There are some audio / analog components present on this cards (LM386-1 amplifier just by the Mini-DIN connector), TSP5220 (apparently a speech synthesizer IC), MC3418 (Continuously Variable Slope Delta Modulator/Demodulator), a couple op amplifiers.
So it is more likely that this card is an audio / speech card, than a mouse interface.