MCA
From HwB
MCA=Micro Channel Architecture.
Developed by IBM in 1987. It was meant to replace ISA, but didn't become very popular since it was proprietary.
The bus is running at 10 MHz bus speed, 16 or 32 bits wide data bus, microprocessor independant and asynchronous. The MCA bus was available on IBM's PS/2 series computers.
Slot/card types
16-bit standard MCA slot:
01 45 48 58 --Side A
+--------------------+-------+ (component)
REAR | ================== | ===== | FRONT
+--------------------+-------+ (soldering)
01 45 48 58 --Side B
16-bit MCA slot with AVE "8514/A Slot":
V10 V1 01 45 48 58
+-------+--------------------+-------+
| ===== | ================== | ===== | FRONT
+-------+--------------------+-------+
01 45 48 58
32-bit MCA slot:
01 45 48 89
+--------------------+-----------------+
REAR | ================== | =============== | FRONT
+--------------------+-----------------+
01 45 48 89
32-bit MCA slot with MME "Memory Card Slot":
MM 1 45 48 89
+-----------------------+-----------------+
| ===================== | =============== | FRONT
+-----------------------+-----------------+
MM 1 45 48 89
32-bit MCA slot with MME and BVE "Video Slot"
V10 V1 MM 1 45 48 89
+-------+-----------------------+-----------------+
| ===== | ===================== | =============== | FRONT
+-------+-----------------------+-----------------+
MM 1 45 48 89
All views are from the top looking down to the slot and are not exactly in scale.
The 'component' and 'soldering' referres to an installed Adapter-Card.
AVE = Auxiliary Video Extension
BVE = Base Video Extension
MME = Matched Memory Extension