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Bus Sizer
The MPC603e processor does not support dynamic bus sizing, as did the 68k
family. Many parts of the software and the hardware rely on that feature. A Motorola
MC68150 chip ‘translates’ the PowerPC 32-bit data bus to a 68030 8 or 16-bit bus.
Except DRAM and VGA controller, all peripherals work on this 68k-type bus. Full
compatibility is therefore ensured with current acquisition boards and small
peripherals.
16 and 8-bit Peripherals
The only 16-bit peripheral hooked on the bus is the acquisition board.
RETINE (A36) generates wait state timings and is used to switch between cold boot
(return to default state) and warm boot (do a RESET, but keep current scope
settings), and generates a bus error if max. access time is out and no peripheral
has acknowledged the access.
ASSISE (A21) generates chip select signals for the bus sizer, BUDGET (A28)
creates typical 68k signals (_BAS, _BDS, 16MHz clock).
The peripheral address decoding is done by a set of GALs (GRANDS (A20),
PETITS (A29)) and a few multiplexers (A30, A22). GRANDS selects between main
peripheral categories (VGA, DRAM, memory card, flash PROM, acquisition board
or other peripherals), PETITS generates chip select signals for 8-bit peripherals
(flash PROM, memory card, non-volatile RAM, Centronics and “others”). It also
determines how many wait states are needed for peripherals not able to
acknowledge a bus access. This is done by pulling low _DSACK0 after having
sensed the corresponding number of wait states trough _BWT1 and _BWT3, which
ends the current access.
The multiplexer A30 does a finer decoding between “others” decoded in PETITS,
namely interrupt controller, small peripherals, serial interface, flash PROM chip 1 or
2, and status registers.
PCMCIA type I / II interface
This interface consists mainly of buffers for both data and address busses.
An OP amp (A10) and a MOS transistor (Q3) allow to switch off the memory card
power supply while no card is plugged in, and turn it on slowly when plugged in.
The GAL CARDAN (A11) handles the card format and generates several control
signals
accordingly.
A16 (an hex D-type flip-flop) holds control bits for 12Vpp (flash programming
voltage), DRAM memory mapping and memory card type. All bits of this register
reset to zero when the _RESET signal goes active low, which means that their state
is also guaranteed at power-up.
A9 and A12 are the read registers for several status bits.
Several EXOR gates (A17 and A18) invert the most significant address bits of the
memory card whenever the SWAP jumper is plugged in, so that the first bytes are
always located at 0xFFF00000, regardless of the size of the memory card. This
allows to boot directly from a PCMCIA memory card.
Theory of Operation
4-5
Summary of Contents for LC564DL
Page 12: ...x Table of Contents ...
Page 18: ...2 4 General Information ...
Page 46: ...4 22 Theory of Operation 4 6 2 Power Supply Block Diagram ...
Page 59: ...Performance Verification 5 13 ...
Page 70: ...5 24 Performance Verification ...
Page 95: ...Performance Verification 5 49 ...
Page 115: ...Performance Verification 5 69 ...
Page 122: ...5 76 Performance Verification Figure 5 14 1MΩ Ω Ω Ω Rise time Equipment Setup ...
Page 148: ...6 14 Maintenance 6 6 4 Fan Problem ...
Page 149: ...6 6 5 Power Supply Voltages Problem Maintenance 6 15 ...
Page 150: ...6 16 Maintenance 6 6 6 Display Problem ...
Page 151: ...6 6 7 Front Panel Controls Do not Operate Maintenance 6 17 ...
Page 152: ...6 18 Maintenance 6 6 8 Remote Control GPIB or RS232 Problem ...
Page 153: ...6 6 9 Performance Verification Fails Maintenance 6 19 ...
Page 154: ...6 20 Maintenance 6 6 10 Floppy Disk Drive Problem ...
Page 155: ...6 6 11 Graphic Printer Problem Maintenance 6 21 ...
Page 156: ...6 22 Maintenance 6 6 12 Centronics Problem ...
Page 157: ...6 6 13 Hard Disk Drive Problem Maintenance 6 23 ...
Page 158: ...6 24 Maintenance ...
Page 181: ...Mechanical Parts 8 1 8 Mechanical Parts Figure 8 1 LC564DL Cabinet ...
Page 182: ...8 2 Mechanical Parts Figure 8 2 LC564DL Chassis Assembly ...
Page 184: ...8 4 Mechanical Parts Figure 8 3 Power Supply Installation ...
Page 185: ...Mechanical Parts 8 5 Figure 8 4 Lower Cover Assembly ...
Page 187: ...Mechanical Parts 8 7 Figure 8 5 Lower Cover Assembly with CKTRIG Option ...
Page 188: ...8 8 Mechanical Parts Figure 8 6 Lower Cover ...
Page 190: ...8 10 Mechanical Parts Figure 8 7 CKTRIG Option ...
Page 191: ...Mechanical Parts 8 11 Figure 8 8 Rear Panel Assembly ...
Page 193: ...Mechanical Parts 8 13 Figure 8 9 900079 Main Board Assembly ...
Page 194: ...8 14 Mechanical Parts Figure 8 10 900079 Main Board Assembly ...
Page 196: ...8 16 Mechanical Parts Figure 8 11 Upper Shield Assembly ...
Page 197: ...Mechanical Parts 8 17 Figure 8 12 Front Frame Assembly ...
Page 199: ...Mechanical Parts 8 19 Figure 8 13 Keypad Assembly ...
Page 200: ...8 20 Mechanical Parts Figure 8 14 Fan Assembly ...
Page 202: ...8 22 Mechanical Parts Figure 8 15 Graphic Printer Assembly ...
Page 203: ...Mechanical Parts 8 23 Figure 8 16 Upper Cover Assembly ...
Page 205: ...Mechanical Parts 8 25 Figure 8 17 Hard Disk Assembly ...
Page 206: ...8 26 Mechanical Parts Figure 8 18 Centronics VGA Interface Assembly ...
Page 207: ...Mechanical Parts 8 27 Figure 8 19 Floppy Disk Assembly ...
Page 209: ...Mechanical Parts 8 29 Figure 8 20 LC564DL Dimensions ...
Page 210: ...8 30 Mechanical Parts Figure 8 21 LC564DL Packaging ...