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186-006 6150 RT PC 020, 025, A25 and 6151 RT PC 010
Six 16-bit and two 8-bit feature slots on models 020 and 025,
Five 16-bit and one 8-bit feature slots on model 010.
Two asynchronous (RS-232C) serial ports with direct memory access on models
020 and 025.
Rear of 6150
6150 RT Tower Planar
A Processor Board
B Floating Point Board
C Memory Option
D Memory Option |
KB Keyboard
M Mouse
1-6 ISA slots
5 AT-Coprocessor slot |
Ed. The slot 1-8 depictions are probably all
hosed up.
Slot 5 AT-Coprocessor slot
The IBM RT 6150 and 6151 system
units use ISA (AT) style I/O slots, however slot 5 on the 6151 and slot
8 on the 6150 are unique to the RT. Most cards that do not use memory refresh,
or DMA channel 7 will have no problem with that slot. Bus timings
for all the RT bus slots may be slightly different from an AT, as I/O accesses
are not driven by the processor directly, but are routed via a special
bus processor in the planar, called the IOCC.
The 8th slot in the 6150 RT (5th
slot for 6150 only) have three signals different from the normal
PC/AT assignments.
Pin Standard CO-proc slot usage My notes..
B19 REFRESH + SPK DRV (Wire or'd to speaker control)
D14 DACK 7 - DACK 8 DMA channel is reassigned..
D15 DRQ 7 + DRQ 8 .. ditto
The PC XT mono/printer adapter, is ONLY supported
in slot 3 in the 6150 tower, or ONLY in slot 1 in the 6151 desktop. (I'm
not sure why this slot 3 restriction is here, what's wrong with slot 6?
Timing? - MW)
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