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F/+HINT7
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_30.ADF |
| Filename: | F/+HINT7 |
| Read OK: | ✔ |
| File size: | 0FBA bytes |
| Load address: | 2B204556 |
| Exec address: | 544E4948 |
File contents
ROM number allocation:
ROM selected by one write to address &FE05 are numbered 12 to 15,
specified by 1100, 1101, 1110, 1111 in D3 D2 D1 D0 respectively. These
ROMs are allocated to high priority NMI devices, or language which is to
boot up before BASIC (eg a games cartridge).
ROMs selected by two writes to address &FE05 are numbered 0 to 7,
specified by 0000, 0001, 0010, 0100, 0101, 0110, 0111 in D3 D2 D1 D0
respectively. These ROMs are low priority.
Acorn Plus 1 priority is forced as follows, highest priority first:
15 to 12
7 to 0
BASIC
This means that if sideways ROMs are used with the Plus 1 fitted then a
language in 0 to 7 will power-up ahead of BASIC.
ROM number allocation is as follows:
0,1 Second external socket on expansion module (SK2)
2,3 First external socket on expansion module (SK1)
4-6 User applications
7 Modem
8,9 Keyboard
10,11 BASIC
12 Expansion module operating system
13 High priority slot in expansion module
14 ECONET
15 Disc
6.0 Mechanical Constraints
Expansion modules must be designed to mate mechanically with the rear of
the Electron (relevant dimensions are given in the Appendix). Note that
the case of any expansion module should have a protruding tongue which
locates, with the clearance shown, into the cutout at the rear of the
Electron. This ensures that the connector cannot be inserted crookedly.
A simple connector without case location is not sufficient: if the connect
is inserted crookedly while the power is on (in such a way as to short
adjacent tracks), damage can be done to the Electron. For secure
attachment, modules should be supplied with captive screws which locate
into recessed brass bosses at the rear of the Electron.
7.0 Compatibility with Acorn Expansion Modules
I/O space
Page &FC in memory is reserved for peripherals with small memory
requirements. Only one peripheral will be allocated to each group of
addresses. Use of any memory areas not designated for user applications
may lead to conflict with expansion modules produced by Acorn.
Initial allocations of space are as follows:
FC00 to FC0F Test hardware
FC10 to FC13 TELETEXT
FC14 to FC1F PRESTEL
FC20 to FC27 IEEE 488 Interface
FC28 to FC2F ECONET
FC30 to FC3F CAMBRIDGE RING interface
FC40 to FC37 WINCHESTER disc interface
FC48 to FC5F Reserved for ACORN expansions
FC60 to FC6F ACIA
FC70 A to D conversion
FC71 CENTRONICS
FC72 Status register - BSY ADC FB2 FB1 x x x x
FB1 - fire button 1
FB2 - fire button 2
ADC - end of A to D conversion
BSY - printer busy
x - undefined
FC73 Sideways scrolled ROM control register
FC74 to FC7F Reserved for ACORN expansions
FC80 to FC8F Test hardware
FC90 to FC9F Sound/speech
FCA0 to FCAF Reserved for ACORN expansions
FCB0 to FCBF VIA/real-time clock
FCD0 to FCDF Floppy disc controller
FCE0 to FCEF THE TUBE
FCF0 to FCFE User applications
FCFF Paging register for JIM
ROM numbers:
Use of sideways ROM numbers other than those designated for user
applications may cause conflict with expansion modules produced by Acorn.
Connection of two expansion modules which use the same ROM number will
cause the system to crash and may result in damage to the expansion units
or to the Electron.
7.1 BS 415
Any expansion module must meet BS 415 Class 1 specification for
electrical safety.
00000000 0d 52 4f 4d 20 6e 75 6d 62 65 72 20 61 6c 6c 6f |.ROM number allo| 00000010 63 61 74 69 6f 6e 3a 0d 0d 52 4f 4d 20 73 65 6c |cation:..ROM sel| 00000020 65 63 74 65 64 20 62 79 20 6f 6e 65 20 77 72 69 |ected by one wri| 00000030 74 65 20 74 6f 20 61 64 64 72 65 73 73 20 26 46 |te to address &F| 00000040 45 30 35 20 61 72 65 20 6e 75 6d 62 65 72 65 64 |E05 are numbered| 00000050 20 31 32 20 74 6f 20 31 35 2c 0d 73 70 65 63 69 | 12 to 15,.speci| 00000060 66 69 65 64 20 62 79 20 31 31 30 30 2c 20 31 31 |fied by 1100, 11| 00000070 30 31 2c 20 31 31 31 30 2c 20 31 31 31 31 20 69 |01, 1110, 1111 i| 00000080 6e 20 44 33 20 44 32 20 44 31 20 44 30 20 72 65 |n D3 D2 D1 D0 re| 00000090 73 70 65 63 74 69 76 65 6c 79 2e 20 20 54 68 65 |spectively. The| 000000a0 73 65 0d 52 4f 4d 73 20 61 72 65 20 61 6c 6c 6f |se.ROMs are allo| 000000b0 63 61 74 65 64 20 74 6f 20 68 69 67 68 20 70 72 |cated to high pr| 000000c0 69 6f 72 69 74 79 20 4e 4d 49 20 64 65 76 69 63 |iority NMI devic| 000000d0 65 73 2c 20 6f 72 20 6c 61 6e 67 75 61 67 65 20 |es, or language | 000000e0 77 68 69 63 68 20 69 73 20 74 6f 0d 62 6f 6f 74 |which is to.boot| 000000f0 20 75 70 20 62 65 66 6f 72 65 20 42 41 53 49 43 | up before BASIC| 00000100 20 28 65 67 20 61 20 67 61 6d 65 73 20 63 61 72 | (eg a games car| 00000110 74 72 69 64 67 65 29 2e 0d 0d 52 4f 4d 73 20 73 |tridge)...ROMs s| 00000120 65 6c 65 63 74 65 64 20 62 79 20 74 77 6f 20 77 |elected by two w| 00000130 72 69 74 65 73 20 74 6f 20 61 64 64 72 65 73 73 |rites to address| 00000140 20 26 46 45 30 35 20 61 72 65 20 6e 75 6d 62 65 | &FE05 are numbe| 00000150 72 65 64 20 30 20 74 6f 20 37 2c 0d 73 70 65 63 |red 0 to 7,.spec| 00000160 69 66 69 65 64 20 62 79 20 30 30 30 30 2c 20 30 |ified by 0000, 0| 00000170 30 30 31 2c 20 30 30 31 30 2c 20 30 31 30 30 2c |001, 0010, 0100,| 00000180 20 30 31 30 31 2c 20 30 31 31 30 2c 20 30 31 31 | 0101, 0110, 011| 00000190 31 20 69 6e 20 44 33 20 44 32 20 44 31 20 44 30 |1 in D3 D2 D1 D0| 000001a0 0d 72 65 73 70 65 63 74 69 76 65 6c 79 2e 20 20 |.respectively. | 000001b0 54 68 65 73 65 20 52 4f 4d 73 20 61 72 65 20 6c |These ROMs are l| 000001c0 6f 77 20 70 72 69 6f 72 69 74 79 2e 0d 0d 41 63 |ow priority...Ac| 000001d0 6f 72 6e 20 50 6c 75 73 20 31 20 70 72 69 6f 72 |orn Plus 1 prior| 000001e0 69 74 79 20 69 73 20 66 6f 72 63 65 64 20 61 73 |ity is forced as| 000001f0 20 66 6f 6c 6c 6f 77 73 2c 20 68 69 67 68 65 73 | follows, highes| 00000200 74 20 70 72 69 6f 72 69 74 79 20 66 69 72 73 74 |t priority first| 00000210 3a 0d 0d 20 20 20 20 20 20 20 20 31 35 20 74 6f |:.. 15 to| 00000220 20 31 32 0d 20 20 20 20 20 20 20 20 37 20 74 6f | 12. 7 to| 00000230 20 20 20 30 0d 20 20 20 20 20 20 20 20 42 41 53 | 0. BAS| 00000240 49 43 0d 0d 54 68 69 73 20 6d 65 61 6e 73 20 74 |IC..This means t| 00000250 68 61 74 20 69 66 20 73 69 64 65 77 61 79 73 20 |hat if sideways | 00000260 52 4f 4d 73 20 61 72 65 20 75 73 65 64 20 77 69 |ROMs are used wi| 00000270 74 68 20 74 68 65 20 50 6c 75 73 20 31 20 66 69 |th the Plus 1 fi| 00000280 74 74 65 64 20 74 68 65 6e 20 61 0d 6c 61 6e 67 |tted then a.lang| 00000290 75 61 67 65 20 69 6e 20 30 20 74 6f 20 37 20 77 |uage in 0 to 7 w| 000002a0 69 6c 6c 20 70 6f 77 65 72 2d 75 70 20 61 68 65 |ill power-up ahe| 000002b0 61 64 20 6f 66 20 42 41 53 49 43 2e 0d 0d 52 4f |ad of BASIC...RO| 000002c0 4d 20 6e 75 6d 62 65 72 20 61 6c 6c 6f 63 61 74 |M number allocat| 000002d0 69 6f 6e 20 69 73 20 61 73 20 66 6f 6c 6c 6f 77 |ion is as follow| 000002e0 73 3a 0d 0d 20 20 20 20 20 20 20 20 30 2c 31 20 |s:.. 0,1 | 000002f0 20 20 20 20 53 65 63 6f 6e 64 20 65 78 74 65 72 | Second exter| 00000300 6e 61 6c 20 73 6f 63 6b 65 74 20 6f 6e 20 65 78 |nal socket on ex| 00000310 70 61 6e 73 69 6f 6e 20 6d 6f 64 75 6c 65 20 28 |pansion module (| 00000320 53 4b 32 29 0d 20 20 20 20 20 20 20 20 32 2c 33 |SK2). 2,3| 00000330 20 20 20 20 20 46 69 72 73 74 20 65 78 74 65 72 | First exter| 00000340 6e 61 6c 20 73 6f 63 6b 65 74 20 6f 6e 20 65 78 |nal socket on ex| 00000350 70 61 6e 73 69 6f 6e 20 6d 6f 64 75 6c 65 20 28 |pansion module (| 00000360 53 4b 31 29 0d 20 20 20 20 20 20 20 20 34 2d 36 |SK1). 4-6| 00000370 20 20 20 20 20 55 73 65 72 20 61 70 70 6c 69 63 | User applic| 00000380 61 74 69 6f 6e 73 0d 20 20 20 20 20 20 20 20 37 |ations. 7| 00000390 20 20 20 20 20 20 20 4d 6f 64 65 6d 0d 20 20 20 | Modem. | 000003a0 20 20 20 20 20 38 2c 39 20 20 20 20 20 4b 65 79 | 8,9 Key| 000003b0 62 6f 61 72 64 0d 20 20 20 20 20 20 20 20 31 30 |board. 10| 000003c0 2c 31 31 20 20 20 42 41 53 49 43 0d 20 20 20 20 |,11 BASIC. | 000003d0 20 20 20 20 31 32 20 20 20 20 20 20 45 78 70 61 | 12 Expa| 000003e0 6e 73 69 6f 6e 20 6d 6f 64 75 6c 65 20 6f 70 65 |nsion module ope| 000003f0 72 61 74 69 6e 67 20 73 79 73 74 65 6d 0d 20 20 |rating system. | 00000400 20 20 20 20 20 20 31 33 20 20 20 20 20 20 48 69 | 13 Hi| 00000410 67 68 20 70 72 69 6f 72 69 74 79 20 73 6c 6f 74 |gh priority slot| 00000420 20 69 6e 20 65 78 70 61 6e 73 69 6f 6e 20 6d 6f | in expansion mo| 00000430 64 75 6c 65 0d 20 20 20 20 20 20 20 20 31 34 20 |dule. 14 | 00000440 20 20 20 20 20 45 43 4f 4e 45 54 0d 20 20 20 20 | ECONET. | 00000450 20 20 20 20 31 35 20 20 20 20 20 20 44 69 73 63 | 15 Disc| 00000460 0d 0d 0d 36 2e 30 20 20 4d 65 63 68 61 6e 69 63 |...6.0 Mechanic| 00000470 61 6c 20 43 6f 6e 73 74 72 61 69 6e 74 73 0d 0d |al Constraints..| 00000480 45 78 70 61 6e 73 69 6f 6e 20 6d 6f 64 75 6c 65 |Expansion module| 00000490 73 20 6d 75 73 74 20 62 65 20 64 65 73 69 67 6e |s must be design| 000004a0 65 64 20 74 6f 20 6d 61 74 65 20 6d 65 63 68 61 |ed to mate mecha| 000004b0 6e 69 63 61 6c 6c 79 20 77 69 74 68 20 74 68 65 |nically with the| 000004c0 20 72 65 61 72 20 6f 66 0d 74 68 65 20 45 6c 65 | rear of.the Ele| 000004d0 63 74 72 6f 6e 20 28 72 65 6c 65 76 61 6e 74 20 |ctron (relevant | 000004e0 64 69 6d 65 6e 73 69 6f 6e 73 20 61 72 65 20 67 |dimensions are g| 000004f0 69 76 65 6e 20 69 6e 20 74 68 65 20 41 70 70 65 |iven in the Appe| 00000500 6e 64 69 78 29 2e 20 20 4e 6f 74 65 20 74 68 61 |ndix). Note tha| 00000510 74 0d 74 68 65 20 63 61 73 65 20 6f 66 20 61 6e |t.the case of an| 00000520 79 20 65 78 70 61 6e 73 69 6f 6e 20 6d 6f 64 75 |y expansion modu| 00000530 6c 65 20 73 68 6f 75 6c 64 20 68 61 76 65 20 61 |le should have a| 00000540 20 70 72 6f 74 72 75 64 69 6e 67 20 74 6f 6e 67 | protruding tong| 00000550 75 65 20 77 68 69 63 68 0d 6c 6f 63 61 74 65 73 |ue which.locates| 00000560 2c 20 77 69 74 68 20 74 68 65 20 63 6c 65 61 72 |, with the clear| 00000570 61 6e 63 65 20 73 68 6f 77 6e 2c 20 69 6e 74 6f |ance shown, into| 00000580 20 74 68 65 20 63 75 74 6f 75 74 20 61 74 20 74 | the cutout at t| 00000590 68 65 20 72 65 61 72 20 6f 66 20 74 68 65 0d 45 |he rear of the.E| 000005a0 6c 65 63 74 72 6f 6e 2e 20 20 54 68 69 73 20 65 |lectron. This e| 000005b0 6e 73 75 72 65 73 20 74 68 61 74 20 74 68 65 20 |nsures that the | 000005c0 63 6f 6e 6e 65 63 74 6f 72 20 63 61 6e 6e 6f 74 |connector cannot| 000005d0 20 62 65 20 69 6e 73 65 72 74 65 64 20 63 72 6f | be inserted cro| 000005e0 6f 6b 65 64 6c 79 2e 20 0d 41 20 73 69 6d 70 6c |okedly. .A simpl| 000005f0 65 20 63 6f 6e 6e 65 63 74 6f 72 20 77 69 74 68 |e connector with| 00000600 6f 75 74 20 63 61 73 65 20 6c 6f 63 61 74 69 6f |out case locatio| 00000610 6e 20 69 73 20 6e 6f 74 20 73 75 66 66 69 63 69 |n is not suffici| 00000620 65 6e 74 3a 20 69 66 20 74 68 65 20 63 6f 6e 6e |ent: if the conn| 00000630 65 63 74 0d 69 73 20 69 6e 73 65 72 74 65 64 20 |ect.is inserted | 00000640 63 72 6f 6f 6b 65 64 6c 79 20 77 68 69 6c 65 20 |crookedly while | 00000650 74 68 65 20 70 6f 77 65 72 20 69 73 20 6f 6e 20 |the power is on | 00000660 28 69 6e 20 73 75 63 68 20 61 20 77 61 79 20 61 |(in such a way a| 00000670 73 20 74 6f 20 73 68 6f 72 74 0d 61 64 6a 61 63 |s to short.adjac| 00000680 65 6e 74 20 74 72 61 63 6b 73 29 2c 20 64 61 6d |ent tracks), dam| 00000690 61 67 65 20 63 61 6e 20 62 65 20 64 6f 6e 65 20 |age can be done | 000006a0 74 6f 20 74 68 65 20 45 6c 65 63 74 72 6f 6e 2e |to the Electron.| 000006b0 20 20 46 6f 72 20 73 65 63 75 72 65 0d 61 74 74 | For secure.att| 000006c0 61 63 68 6d 65 6e 74 2c 20 6d 6f 64 75 6c 65 73 |achment, modules| 000006d0 20 73 68 6f 75 6c 64 20 62 65 20 73 75 70 70 6c | should be suppl| 000006e0 69 65 64 20 77 69 74 68 20 63 61 70 74 69 76 65 |ied with captive| 000006f0 20 73 63 72 65 77 73 20 77 68 69 63 68 20 6c 6f | screws which lo| 00000700 63 61 74 65 0d 69 6e 74 6f 20 72 65 63 65 73 73 |cate.into recess| 00000710 65 64 20 62 72 61 73 73 20 62 6f 73 73 65 73 20 |ed brass bosses | 00000720 61 74 20 74 68 65 20 72 65 61 72 20 6f 66 20 74 |at the rear of t| 00000730 68 65 20 45 6c 65 63 74 72 6f 6e 2e 0d 0d 0d 37 |he Electron....7| 00000740 2e 30 20 20 43 6f 6d 70 61 74 69 62 69 6c 69 74 |.0 Compatibilit| 00000750 79 20 77 69 74 68 20 41 63 6f 72 6e 20 45 78 70 |y with Acorn Exp| 00000760 61 6e 73 69 6f 6e 20 4d 6f 64 75 6c 65 73 0d 0d |ansion Modules..| 00000770 49 2f 4f 20 73 70 61 63 65 0d 0d 50 61 67 65 20 |I/O space..Page | 00000780 26 46 43 20 69 6e 20 6d 65 6d 6f 72 79 20 69 73 |&FC in memory is| 00000790 20 72 65 73 65 72 76 65 64 20 66 6f 72 20 70 65 | reserved for pe| 000007a0 72 69 70 68 65 72 61 6c 73 20 77 69 74 68 20 73 |ripherals with s| 000007b0 6d 61 6c 6c 20 6d 65 6d 6f 72 79 0d 72 65 71 75 |mall memory.requ| 000007c0 69 72 65 6d 65 6e 74 73 2e 20 20 4f 6e 6c 79 20 |irements. Only | 000007d0 6f 6e 65 20 70 65 72 69 70 68 65 72 61 6c 20 77 |one peripheral w| 000007e0 69 6c 6c 20 62 65 20 61 6c 6c 6f 63 61 74 65 64 |ill be allocated| 000007f0 20 74 6f 20 65 61 63 68 20 67 72 6f 75 70 20 6f | to each group o| 00000800 66 0d 61 64 64 72 65 73 73 65 73 2e 20 20 55 73 |f.addresses. Us| 00000810 65 20 6f 66 20 61 6e 79 20 6d 65 6d 6f 72 79 20 |e of any memory | 00000820 61 72 65 61 73 20 6e 6f 74 20 64 65 73 69 67 6e |areas not design| 00000830 61 74 65 64 20 66 6f 72 20 75 73 65 72 20 61 70 |ated for user ap| 00000840 70 6c 69 63 61 74 69 6f 6e 73 0d 6d 61 79 20 6c |plications.may l| 00000850 65 61 64 20 74 6f 20 63 6f 6e 66 6c 69 63 74 20 |ead to conflict | 00000860 77 69 74 68 20 65 78 70 61 6e 73 69 6f 6e 20 6d |with expansion m| 00000870 6f 64 75 6c 65 73 20 70 72 6f 64 75 63 65 64 20 |odules produced | 00000880 62 79 20 41 63 6f 72 6e 2e 0d 0d 49 6e 69 74 69 |by Acorn...Initi| 00000890 61 6c 20 61 6c 6c 6f 63 61 74 69 6f 6e 73 20 6f |al allocations o| 000008a0 66 20 73 70 61 63 65 20 61 72 65 20 61 73 20 66 |f space are as f| 000008b0 6f 6c 6c 6f 77 73 3a 0d 0d 20 20 20 20 20 20 20 |ollows:.. | 000008c0 20 46 43 30 30 20 74 6f 20 46 43 30 46 20 20 20 | FC00 to FC0F | 000008d0 20 20 20 20 20 20 20 20 20 54 65 73 74 20 68 61 | Test ha| 000008e0 72 64 77 61 72 65 0d 20 20 20 20 20 20 20 20 46 |rdware. F| 000008f0 43 31 30 20 74 6f 20 46 43 31 33 20 20 20 20 20 |C10 to FC13 | 00000900 20 20 20 20 20 20 20 54 45 4c 45 54 45 58 54 0d | TELETEXT.| 00000910 20 20 20 20 20 20 20 20 46 43 31 34 20 74 6f 20 | FC14 to | 00000920 46 43 31 46 20 20 20 20 20 20 20 20 20 20 20 20 |FC1F | 00000930 50 52 45 53 54 45 4c 0d 20 20 20 20 20 20 20 20 |PRESTEL. | 00000940 46 43 32 30 20 74 6f 20 46 43 32 37 20 20 20 20 |FC20 to FC27 | 00000950 20 20 20 20 20 20 20 20 49 45 45 45 20 34 38 38 | IEEE 488| 00000960 20 49 6e 74 65 72 66 61 63 65 0d 20 20 20 20 20 | Interface. | 00000970 20 20 20 46 43 32 38 20 74 6f 20 46 43 32 46 20 | FC28 to FC2F | 00000980 20 20 20 20 20 20 20 20 20 20 20 45 43 4f 4e 45 | ECONE| 00000990 54 0d 20 20 20 20 20 20 20 20 46 43 33 30 20 74 |T. FC30 t| 000009a0 6f 20 46 43 33 46 20 20 20 20 20 20 20 20 20 20 |o FC3F | 000009b0 20 20 43 41 4d 42 52 49 44 47 45 20 52 49 4e 47 | CAMBRIDGE RING| 000009c0 20 69 6e 74 65 72 66 61 63 65 0d 20 20 20 20 20 | interface. | 000009d0 20 20 20 46 43 34 30 20 74 6f 20 46 43 33 37 20 | FC40 to FC37 | 000009e0 20 20 20 20 20 20 20 20 20 20 20 57 49 4e 43 48 | WINCH| 000009f0 45 53 54 45 52 20 64 69 73 63 20 69 6e 74 65 72 |ESTER disc inter| 00000a00 66 61 63 65 0d 20 20 20 20 20 20 20 20 46 43 34 |face. FC4| 00000a10 38 20 74 6f 20 46 43 35 46 20 20 20 20 20 20 20 |8 to FC5F | 00000a20 20 20 20 20 20 52 65 73 65 72 76 65 64 20 66 6f | Reserved fo| 00000a30 72 20 41 43 4f 52 4e 20 65 78 70 61 6e 73 69 6f |r ACORN expansio| 00000a40 6e 73 0d 20 20 20 20 20 20 20 20 46 43 36 30 20 |ns. FC60 | 00000a50 74 6f 20 46 43 36 46 20 20 20 20 20 20 20 20 20 |to FC6F | 00000a60 20 20 20 41 43 49 41 0d 20 20 20 20 20 20 20 20 | ACIA. | 00000a70 46 43 37 30 20 20 20 20 20 20 20 20 20 20 20 20 |FC70 | 00000a80 20 20 20 20 20 20 20 20 41 20 74 6f 20 44 20 63 | A to D c| 00000a90 6f 6e 76 65 72 73 69 6f 6e 0d 20 20 20 20 20 20 |onversion. | 00000aa0 20 20 46 43 37 31 20 20 20 20 20 20 20 20 20 20 | FC71 | 00000ab0 20 20 20 20 20 20 20 20 20 20 43 45 4e 54 52 4f | CENTRO| 00000ac0 4e 49 43 53 0d 20 20 20 20 20 20 20 20 46 43 37 |NICS. FC7| 00000ad0 32 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |2 | 00000ae0 20 20 20 20 20 53 74 61 74 75 73 20 72 65 67 69 | Status regi| 00000af0 73 74 65 72 20 2d 20 42 53 59 20 41 44 43 20 46 |ster - BSY ADC F| 00000b00 42 32 20 46 42 31 20 78 20 78 20 78 20 78 0d 20 |B2 FB1 x x x x. | 00000b10 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000b20 20 20 20 20 20 20 20 20 20 46 42 31 20 2d 20 66 | FB1 - f| 00000b30 69 72 65 20 62 75 74 74 6f 6e 20 31 0d 20 20 20 |ire button 1. | 00000b40 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000b50 20 20 20 20 20 20 20 46 42 32 20 2d 20 66 69 72 | FB2 - fir| 00000b60 65 20 62 75 74 74 6f 6e 20 32 0d 20 20 20 20 20 |e button 2. | 00000b70 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000b80 20 20 20 20 20 41 44 43 20 2d 20 65 6e 64 20 6f | ADC - end o| 00000b90 66 20 41 20 74 6f 20 44 20 63 6f 6e 76 65 72 73 |f A to D convers| 00000ba0 69 6f 6e 0d 20 20 20 20 20 20 20 20 20 20 20 20 |ion. | 00000bb0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 42 53 | BS| 00000bc0 59 20 2d 20 70 72 69 6e 74 65 72 20 62 75 73 79 |Y - printer busy| 00000bd0 0d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. | 00000be0 20 20 20 20 20 20 20 20 20 20 20 78 20 2d 20 75 | x - u| 00000bf0 6e 64 65 66 69 6e 65 64 0d 20 20 20 20 20 20 20 |ndefined. | 00000c00 20 46 43 37 33 20 20 20 20 20 20 20 20 20 20 20 | FC73 | 00000c10 20 20 20 20 20 20 20 20 20 53 69 64 65 77 61 79 | Sideway| 00000c20 73 20 73 63 72 6f 6c 6c 65 64 20 52 4f 4d 20 63 |s scrolled ROM c| 00000c30 6f 6e 74 72 6f 6c 20 72 65 67 69 73 74 65 72 0d |ontrol register.| 00000c40 20 20 20 20 20 20 20 20 46 43 37 34 20 74 6f 20 | FC74 to | 00000c50 46 43 37 46 20 20 20 20 20 20 20 20 20 20 20 20 |FC7F | 00000c60 52 65 73 65 72 76 65 64 20 66 6f 72 20 41 43 4f |Reserved for ACO| 00000c70 52 4e 20 65 78 70 61 6e 73 69 6f 6e 73 0d 20 20 |RN expansions. | 00000c80 20 20 20 20 20 20 46 43 38 30 20 74 6f 20 46 43 | FC80 to FC| 00000c90 38 46 20 20 20 20 20 20 20 20 20 20 20 20 54 65 |8F Te| 00000ca0 73 74 20 68 61 72 64 77 61 72 65 0d 20 20 20 20 |st hardware. | 00000cb0 20 20 20 20 46 43 39 30 20 74 6f 20 46 43 39 46 | FC90 to FC9F| 00000cc0 20 20 20 20 20 20 20 20 20 20 20 20 53 6f 75 6e | Soun| 00000cd0 64 2f 73 70 65 65 63 68 0d 20 20 20 20 20 20 20 |d/speech. | 00000ce0 20 46 43 41 30 20 74 6f 20 46 43 41 46 20 20 20 | FCA0 to FCAF | 00000cf0 20 20 20 20 20 20 20 20 20 52 65 73 65 72 76 65 | Reserve| 00000d00 64 20 66 6f 72 20 41 43 4f 52 4e 20 65 78 70 61 |d for ACORN expa| 00000d10 6e 73 69 6f 6e 73 0d 20 20 20 20 20 20 20 20 46 |nsions. F| 00000d20 43 42 30 20 74 6f 20 46 43 42 46 20 20 20 20 20 |CB0 to FCBF | 00000d30 20 20 20 20 20 20 20 56 49 41 2f 72 65 61 6c 2d | VIA/real-| 00000d40 74 69 6d 65 20 63 6c 6f 63 6b 0d 20 20 20 20 20 |time clock. | 00000d50 20 20 20 46 43 44 30 20 74 6f 20 46 43 44 46 20 | FCD0 to FCDF | 00000d60 20 20 20 20 20 20 20 20 20 20 20 46 6c 6f 70 70 | Flopp| 00000d70 79 20 64 69 73 63 20 63 6f 6e 74 72 6f 6c 6c 65 |y disc controlle| 00000d80 72 0d 20 20 20 20 20 20 20 20 46 43 45 30 20 74 |r. FCE0 t| 00000d90 6f 20 46 43 45 46 20 20 20 20 20 20 20 20 20 20 |o FCEF | 00000da0 20 20 54 48 45 20 54 55 42 45 0d 20 20 20 20 20 | THE TUBE. | 00000db0 20 20 20 46 43 46 30 20 74 6f 20 46 43 46 45 20 | FCF0 to FCFE | 00000dc0 20 20 20 20 20 20 20 20 20 20 20 55 73 65 72 20 | User | 00000dd0 61 70 70 6c 69 63 61 74 69 6f 6e 73 0d 20 20 20 |applications. | 00000de0 20 20 20 20 20 46 43 46 46 20 20 20 20 20 20 20 | FCFF | 00000df0 20 20 20 20 20 20 20 20 20 20 20 20 20 50 61 67 | Pag| 00000e00 69 6e 67 20 72 65 67 69 73 74 65 72 20 66 6f 72 |ing register for| 00000e10 20 4a 49 4d 0d 0d 0d 0d 52 4f 4d 20 6e 75 6d 62 | JIM....ROM numb| 00000e20 65 72 73 3a 0d 0d 55 73 65 20 6f 66 20 73 69 64 |ers:..Use of sid| 00000e30 65 77 61 79 73 20 52 4f 4d 20 6e 75 6d 62 65 72 |eways ROM number| 00000e40 73 20 6f 74 68 65 72 20 74 68 61 6e 20 74 68 6f |s other than tho| 00000e50 73 65 20 64 65 73 69 67 6e 61 74 65 64 20 66 6f |se designated fo| 00000e60 72 20 75 73 65 72 0d 61 70 70 6c 69 63 61 74 69 |r user.applicati| 00000e70 6f 6e 73 20 6d 61 79 20 63 61 75 73 65 20 63 6f |ons may cause co| 00000e80 6e 66 6c 69 63 74 20 77 69 74 68 20 65 78 70 61 |nflict with expa| 00000e90 6e 73 69 6f 6e 20 6d 6f 64 75 6c 65 73 20 70 72 |nsion modules pr| 00000ea0 6f 64 75 63 65 64 20 62 79 20 41 63 6f 72 6e 2e |oduced by Acorn.| 00000eb0 20 0d 43 6f 6e 6e 65 63 74 69 6f 6e 20 6f 66 20 | .Connection of | 00000ec0 74 77 6f 20 65 78 70 61 6e 73 69 6f 6e 20 6d 6f |two expansion mo| 00000ed0 64 75 6c 65 73 20 77 68 69 63 68 20 75 73 65 20 |dules which use | 00000ee0 74 68 65 20 73 61 6d 65 20 52 4f 4d 20 6e 75 6d |the same ROM num| 00000ef0 62 65 72 20 77 69 6c 6c 0d 63 61 75 73 65 20 74 |ber will.cause t| 00000f00 68 65 20 73 79 73 74 65 6d 20 74 6f 20 63 72 61 |he system to cra| 00000f10 73 68 20 61 6e 64 20 6d 61 79 20 72 65 73 75 6c |sh and may resul| 00000f20 74 20 69 6e 20 64 61 6d 61 67 65 20 74 6f 20 74 |t in damage to t| 00000f30 68 65 20 65 78 70 61 6e 73 69 6f 6e 20 75 6e 69 |he expansion uni| 00000f40 74 73 0d 6f 72 20 74 6f 20 74 68 65 20 45 6c 65 |ts.or to the Ele| 00000f50 63 74 72 6f 6e 2e 0d 0d 20 0d 37 2e 31 20 42 53 |ctron... .7.1 BS| 00000f60 20 34 31 35 0d 0d 41 6e 79 20 65 78 70 61 6e 73 | 415..Any expans| 00000f70 69 6f 6e 20 6d 6f 64 75 6c 65 20 6d 75 73 74 20 |ion module must | 00000f80 6d 65 65 74 20 42 53 20 34 31 35 20 43 6c 61 73 |meet BS 415 Clas| 00000f90 73 20 31 20 73 70 65 63 69 66 69 63 61 74 69 6f |s 1 specificatio| 00000fa0 6e 20 66 6f 72 0d 65 6c 65 63 74 72 69 63 61 6c |n for.electrical| 00000fb0 20 73 61 66 65 74 79 2e 0d 0d | safety...| 00000fba
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