HP 9825A - Page 44

9-2 9825A/B Diagrams
98258 Memory Map
Address
77777
76550
70000
60000
56000
1
54000
52000
50000
2
46000
44000
42000
40000
36000
3
34000
4
32000
5
30000
6
20000
10000
04000
02000
00000
Notes:
9825B/24K
9825B/32K
Stolen
Base
Page RWM
A24RWM
Strings ROM
Ext. 110 ROM
Ext. 1I0ROM
Adv. Pgm. ROM
A24RWM
Mtrx. Or Sys. Pgm. Opt. ROM
9872 or 9862 Plot. ROM
Gen. 110 ROM
9885 Op. ROM
I
System ROM
Compiler ROM Tables
Proc. Reg. IBasepage ROM
9825T Memory Map
Sys.lOpt. ROM
7
RWM
Stolen
Base
Page RWM
9895 Op. ROM
Sys. Pgm. ROM
Strings ROM
Ext. liO ROM
Ext. 1/0 ROM
Adv. Pgm. ROM
Matrix ROM
9862172
Gen. 1/0 ROM
9885 Op. ROM
I
System ROM
A24
A25
Compiler
ROM Tables
Proc. Reg'/Basepage ROM
19895 Opt. ROM is in the 98228A Plug-In Option ROM. It functions only with the 9825T configuration with a Rev. B or higher A12 assembly
2 Systems Prog. ROM is on the A24 board in a 9825T configuration. Enabled by the A25 board; addresses differ from the 98224A Option ROM
3 Matrix ROM is in the 98211A Plug-In Option ROM for both Band 1's. The 98224A Plug-In Option ROM must be used in a 9825B for Sys
Prog. Either the 98211A or 98224A Plug-In may be used In a 98258. but not at the same time. they use the same address space
4 A sWitch on the A24 board selects 9872 or 9862 plotter ROM
5 General I a ROM is on the A24 board
6 9RR5 Option ROM is in the 98217A and 98228A Plug-In Option ROM
7 5"5Ie'11 ROM is 0~ the A24 board