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boards:ecb:vga3:vga3 [2017/05/29 14:31]
jcoffman [80 x 25 @ 70hz on a wide-screen monitor]
boards:ecb:vga3:vga3 [2017/07/18 21:45] (current)
wwarthen
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 As on the CVDU, a PS/2 keyboard may be attached to an 8242 keyboard controller chip. The VIA chip, as shown in the photo above, has proved to be very reliable. The keyboard generates interrrupts on the ECB bus on B_/INT, or B_/IR1 when an interrupt controller is present. IRQ1 is the channel used on the IBM PC's. As on the CVDU, a PS/2 keyboard may be attached to an 8242 keyboard controller chip. The VIA chip, as shown in the photo above, has proved to be very reliable. The keyboard generates interrrupts on the ECB bus on B_/INT, or B_/IR1 when an interrupt controller is present. IRQ1 is the channel used on the IBM PC's.
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 ===== Screen Display Samples ===== ===== Screen Display Samples =====
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 ==== 80 x 30 @ 60hz on a wide display (a 512 character font is in use): ==== ==== 80 x 30 @ 60hz on a wide display (a 512 character font is in use): ====
boards/ecb/vga3/vga3.txt · Last modified: 2017/07/18 21:45 by wwarthen
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