Table 3-1
Memory Space Allocation
Theory of Operation— 2230 Service
Block Designation
Block Address (Hex)
Space Allocation Purpose
RAM SEG 00000-3FFFF
Four images of Memory Segment 0
RAM Primary
00000-07FFF
08000-0FFFF
8-bit display RAM—waveforms, interrupt vectors, miscellaneous.
4 bits of display RAM for waveform attributes (LSB).
10000-3FFFF
RAM Images.
10 SEG
40000-7FFFF
Four images of Memory Segment 1
10 Main Image 4067C (IO-2 A7,8)
406BC (IO-2 A6,8)
406F0 (10-2 A3,8)
406F1 (10-2 A3,8)
406F2 (10-2 A3,8)
406F3 (10-2 A3,8)
_ 406F4 (10-2 A3,8)
‘ 406F5 (10-2 A3,8)
406F6 (10-2 A3,8)
406F7 (10-2 A3,8)
406F8 (10-2 A2,8)
407DE (10-2 A5)
407EE (10-2 A4)
Option Status Latch (in).
Option Parameters Latch (in).
Option UART/GPIB chips (I/O).
Option UART/GPIB chips (I/O).
Option UART/GPIB chips (I/O).
Option UART/GPIB chips (I/O).
Option UART/GPIB chips (I/O).
Option UART/GPIB chips (I/O).
Option UART/GPIB chips (I/O).
Option UART/GPIB chips (I/O).
Option Interrupt Mask Latch (out).
Time Base Mode Register U4119.
Time Base Divider Register U4113.
41XXX (INT-RST)
42XXX (FRAME)
Display chip interrupt reset.
Display chip next frame.
4377E (10-0 A7)
437BE (10-0 A6)
437DE (10-0 A5)
437EE (10-0 A4)
437F6 (10-0 A3)
437FA (10-0 A2)
Acquisition Memory Address Buffer Low bits U3427.
Acquisition Mode Register U3310.
B Delay Timer U4123.
Record Counter U4115 and U4116.
Front Panel A/D control U6104.
Front Panel A/D data U6102.
I
4377F (10-1 A7)
437DF (10-1 A5)
437EF (10-1 A4)
437F7 (10-1 A3)
437FB (10-1 A2)
Acquisition Memory Address Buffer high bits U3428.
B Delay Timer U4124.
Record Counter U4117.
Clock Delay Timer U4231.
Main Front Panel Input U6103.
43FFA (IO-OL A2) Front Panel Buffer U9301.
43FFB (10-1L A2)
Front Panel Buffer U9302.
48000-4BFFF Acquisition Memory—Four images of Acquisition RAM U3418
and U3419.
10 Duplicate Images
50000-7FFFF
COMM SEGMENT
80000-BFFFF Two images of Memory Segment 2
Option Main Image
80000-87FFF
88000-8F7FF
8F800-8FFFF
90000-97FFF
Half of Communication Options ROMs U1243 or U1343.
Option nonvolatile RAM.
Nonvolatile RAM.
Half of Communication Options ROMs U1243 or U1343.
3-27
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