16 Nov
2006
16 Nov
'06
2:09 p.m.
On 16 Nov 2006 at 13:44, Chris M wrote:
Or desolder it from a CGA card or any other IBM
compatible with built in video. I recommend a cool
water wave tank for the process.
You know, when desoldering a chip such as a 40-pin DIP like the 6545,
I've never gotten the chip body anywhere near being too hot to touch.
As a matter of fact, I'd worry that the water would conduct too much
heat away from the chip to allow the PCB solder to melt quickly.
Are they absolute drop in replacements for one
another?
My copy of the 6545 chip datasheet states that it's pin-compatible
with the 6845. At first blush, the chip programming looks to be
identical, but there might be some electrical parameters that are
sensitive to chip choice.
Cheers,
Chuck