Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_30.ADF » F/+HINT3
F/+HINT3
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/+HINT3 |
| Read OK: | ✔ |
| File size: | 0EE1 bytes |
| Load address: | 2B204556 |
| Exec address: | 544E4948 |
File contents
19 ADOUT - System audio output
This is the filtered output of the sum of all audio inputs to the
host computer. No significant load should be taken from this node.
20 AGND - Audio Ground
This is the zero volt return for ADOUT. It should be used instead
of the system zero volt connection to reduce audio noise.
21 ADIN - Cartridge audio output
In the Electron:
This is merely a connection from one cartridge to the other.
In the Master 128:
This is an output to the host computer audio circuitry. It 'sees'
an impedance of at least 1.0kOhms. Two cartridges with audio output
should not be inserted into the host computer at the same time.
22 0V - Zero volts
This is the system earth return for digital signals.
SIDE 'B'
1 +5V - Power supply
This is the system logic supply rail. No more than 150mA should be
drawn by a cartridge in a fully configured Master 128 computer, ie with
internal Second Processor fitted. No more than 10mA should be drawn by a
cartridge fitted to the Electron.
2 A10 - Address line 10 : Input with TTL levels
3 D3 - Data bus line 3 : Input/Output with TTL levels
4 A11 - Address line 11 : Input with TTL levels
5 A9 - Address line 9 : Input with TTL levels
6 D7 - Most significant data bus line : Input/Output with TTL levels
7 D6 - Data bus line 6 : Input/Output with TTL levels
8 D5 - Data bus line 5 : Input/Output with TTL levels
9 D4 - Data bus line 4 : Input/Output with TTL levels
10 nOE2 - Output Enable : Input with TTL levels
This line provides an additional active low output enable for ROMs
in the Electron. This corresponds to ROM position 13 and consequently
responds quickly to service calls. it is low during the active low
portion of PH12. It is not guaranteed to be high at other times.
LPSTB - Light pen strobe
A connection with a pull up to +5V is provided to the CRTC light pen
strobe and system interrupt structure. When an on-board link is removed,
this connection is merely a link from one cartridge to the other.
11 BA7 - Buffered address line 7 : Input with TTL levels
The buffered address lines hold addresses valid for 125ns after PH12
goes low. They are not buffered or held valid for an extended period in
the Electron.
12 BA6 - Buffered address line 6 : Input with TTL levels
13 BA5 - Buffered address line 5 : Input with TTL levels
14 BA4 - Buffered address line 4 : Input with TTL levels
15 BA3 - Buffered address line 3 : Input with TTL levels
16 BA2 - Buffered address line 2 : Input with TTL levels
17 BA1 - Buffered address line 1 : Input with TTL levels
18 BA0 - Buffered address line 0 : Input with TTL levels
19 D0 - Data bus line 0 : Input/Output with TTL levels
20 D2 - Data bus line 2 : Input/Output with TTL levels
21 D1 - Data bus line 1 : Input/Output with TTL levels
22 0V - Zero volts
This is the earth return for digital signals
Where two or more cartridges are fitted, any host computer links
affect ALL cartridges.
3.0 Memory Map
All accesses to the cartridges are performed at 2MHz. The memory map
within the area &FC00 to &FD00 differs between the Electron and the Master
128:
3.1 Master 128 Memory Map
At the time of writing the memory map within the areas INFC and INFD in
the Master 128 computer are as follows:
&FCFF Paging register for memory in the &8000 to &BFFF
region.
Paging logic has to be implemented in each cartridge as necessary.
&FC82
&FC81 Speech system
&FC80 to &FCFE Reserved for use by Acorn.
00000000 31 39 20 20 41 44 4f 55 54 20 2d 20 53 79 73 74 |19 ADOUT - Syst| 00000010 65 6d 20 61 75 64 69 6f 20 6f 75 74 70 75 74 0d |em audio output.| 00000020 20 20 20 20 20 20 54 68 69 73 20 69 73 20 74 68 | This is th| 00000030 65 20 66 69 6c 74 65 72 65 64 20 6f 75 74 70 75 |e filtered outpu| 00000040 74 20 6f 66 20 74 68 65 20 73 75 6d 20 6f 66 20 |t of the sum of | 00000050 61 6c 6c 20 61 75 64 69 6f 20 69 6e 70 75 74 73 |all audio inputs| 00000060 20 74 6f 20 74 68 65 0d 20 20 20 20 20 20 68 6f | to the. ho| 00000070 73 74 20 63 6f 6d 70 75 74 65 72 2e 20 20 4e 6f |st computer. No| 00000080 20 73 69 67 6e 69 66 69 63 61 6e 74 20 6c 6f 61 | significant loa| 00000090 64 20 73 68 6f 75 6c 64 20 62 65 20 74 61 6b 65 |d should be take| 000000a0 6e 20 66 72 6f 6d 20 74 68 69 73 20 6e 6f 64 65 |n from this node| 000000b0 2e 0d 0d 32 30 20 20 41 47 4e 44 20 2d 20 41 75 |...20 AGND - Au| 000000c0 64 69 6f 20 47 72 6f 75 6e 64 0d 20 20 20 20 20 |dio Ground. | 000000d0 20 54 68 69 73 20 69 73 20 74 68 65 20 7a 65 72 | This is the zer| 000000e0 6f 20 76 6f 6c 74 20 72 65 74 75 72 6e 20 66 6f |o volt return fo| 000000f0 72 20 41 44 4f 55 54 2e 20 20 49 74 20 73 68 6f |r ADOUT. It sho| 00000100 75 6c 64 20 62 65 20 75 73 65 64 20 69 6e 73 74 |uld be used inst| 00000110 65 61 64 0d 20 20 20 20 20 20 6f 66 20 74 68 65 |ead. of the| 00000120 20 73 79 73 74 65 6d 20 7a 65 72 6f 20 76 6f 6c | system zero vol| 00000130 74 20 63 6f 6e 6e 65 63 74 69 6f 6e 20 74 6f 20 |t connection to | 00000140 72 65 64 75 63 65 20 61 75 64 69 6f 20 6e 6f 69 |reduce audio noi| 00000150 73 65 2e 0d 0d 32 31 20 20 41 44 49 4e 20 2d 20 |se...21 ADIN - | 00000160 43 61 72 74 72 69 64 67 65 20 61 75 64 69 6f 20 |Cartridge audio | 00000170 6f 75 74 70 75 74 0d 20 20 20 20 20 20 49 6e 20 |output. In | 00000180 74 68 65 20 45 6c 65 63 74 72 6f 6e 3a 0d 20 20 |the Electron:. | 00000190 20 20 20 20 54 68 69 73 20 69 73 20 6d 65 72 65 | This is mere| 000001a0 6c 79 20 61 20 63 6f 6e 6e 65 63 74 69 6f 6e 20 |ly a connection | 000001b0 66 72 6f 6d 20 6f 6e 65 20 63 61 72 74 72 69 64 |from one cartrid| 000001c0 67 65 20 74 6f 20 74 68 65 20 6f 74 68 65 72 2e |ge to the other.| 000001d0 0d 0d 20 20 20 20 20 20 49 6e 20 74 68 65 20 4d |.. In the M| 000001e0 61 73 74 65 72 20 31 32 38 3a 0d 20 20 20 20 20 |aster 128:. | 000001f0 20 54 68 69 73 20 69 73 20 61 6e 20 6f 75 74 70 | This is an outp| 00000200 75 74 20 74 6f 20 74 68 65 20 68 6f 73 74 20 63 |ut to the host c| 00000210 6f 6d 70 75 74 65 72 20 61 75 64 69 6f 20 63 69 |omputer audio ci| 00000220 72 63 75 69 74 72 79 2e 20 20 49 74 20 27 73 65 |rcuitry. It 'se| 00000230 65 73 27 0d 20 20 20 20 20 20 61 6e 20 69 6d 70 |es'. an imp| 00000240 65 64 61 6e 63 65 20 6f 66 20 61 74 20 6c 65 61 |edance of at lea| 00000250 73 74 20 31 2e 30 6b 4f 68 6d 73 2e 20 20 54 77 |st 1.0kOhms. Tw| 00000260 6f 20 63 61 72 74 72 69 64 67 65 73 20 77 69 74 |o cartridges wit| 00000270 68 20 61 75 64 69 6f 20 6f 75 74 70 75 74 0d 20 |h audio output. | 00000280 20 20 20 20 20 73 68 6f 75 6c 64 20 6e 6f 74 20 | should not | 00000290 62 65 20 69 6e 73 65 72 74 65 64 20 69 6e 74 6f |be inserted into| 000002a0 20 74 68 65 20 68 6f 73 74 20 63 6f 6d 70 75 74 | the host comput| 000002b0 65 72 20 61 74 20 74 68 65 20 73 61 6d 65 20 74 |er at the same t| 000002c0 69 6d 65 2e 0d 0d 32 32 20 20 30 56 20 2d 20 5a |ime...22 0V - Z| 000002d0 65 72 6f 20 76 6f 6c 74 73 0d 20 20 20 20 20 20 |ero volts. | 000002e0 54 68 69 73 20 69 73 20 74 68 65 20 73 79 73 74 |This is the syst| 000002f0 65 6d 20 65 61 72 74 68 20 72 65 74 75 72 6e 20 |em earth return | 00000300 66 6f 72 20 64 69 67 69 74 61 6c 20 73 69 67 6e |for digital sign| 00000310 61 6c 73 2e 0d 0d 0d 53 49 44 45 20 27 42 27 0d |als....SIDE 'B'.| 00000320 0d 31 20 20 20 20 2b 35 56 20 2d 20 50 6f 77 65 |.1 +5V - Powe| 00000330 72 20 73 75 70 70 6c 79 0d 20 20 20 20 20 20 54 |r supply. T| 00000340 68 69 73 20 69 73 20 74 68 65 20 73 79 73 74 65 |his is the syste| 00000350 6d 20 6c 6f 67 69 63 20 73 75 70 70 6c 79 20 72 |m logic supply r| 00000360 61 69 6c 2e 20 20 4e 6f 20 6d 6f 72 65 20 74 68 |ail. No more th| 00000370 61 6e 20 31 35 30 6d 41 20 73 68 6f 75 6c 64 20 |an 150mA should | 00000380 62 65 0d 64 72 61 77 6e 20 62 79 20 61 20 63 61 |be.drawn by a ca| 00000390 72 74 72 69 64 67 65 20 69 6e 20 61 20 66 75 6c |rtridge in a ful| 000003a0 6c 79 20 63 6f 6e 66 69 67 75 72 65 64 20 4d 61 |ly configured Ma| 000003b0 73 74 65 72 20 31 32 38 20 63 6f 6d 70 75 74 65 |ster 128 compute| 000003c0 72 2c 20 69 65 20 77 69 74 68 0d 69 6e 74 65 72 |r, ie with.inter| 000003d0 6e 61 6c 20 53 65 63 6f 6e 64 20 50 72 6f 63 65 |nal Second Proce| 000003e0 73 73 6f 72 20 66 69 74 74 65 64 2e 20 20 4e 6f |ssor fitted. No| 000003f0 20 6d 6f 72 65 20 74 68 61 6e 20 31 30 6d 41 20 | more than 10mA | 00000400 73 68 6f 75 6c 64 20 62 65 20 64 72 61 77 6e 20 |should be drawn | 00000410 62 79 20 61 0d 63 61 72 74 72 69 64 67 65 20 66 |by a.cartridge f| 00000420 69 74 74 65 64 20 74 6f 20 74 68 65 20 45 6c 65 |itted to the Ele| 00000430 63 74 72 6f 6e 2e 0d 0d 32 20 20 20 20 41 31 30 |ctron...2 A10| 00000440 20 2d 20 41 64 64 72 65 73 73 20 6c 69 6e 65 20 | - Address line | 00000450 31 30 20 3a 20 49 6e 70 75 74 20 77 69 74 68 20 |10 : Input with | 00000460 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 33 20 20 20 |TTL levels..3 | 00000470 20 44 33 20 2d 20 44 61 74 61 20 62 75 73 20 6c | D3 - Data bus l| 00000480 69 6e 65 20 33 20 3a 20 49 6e 70 75 74 2f 4f 75 |ine 3 : Input/Ou| 00000490 74 70 75 74 20 77 69 74 68 20 54 54 4c 20 6c 65 |tput with TTL le| 000004a0 76 65 6c 73 0d 0d 34 20 20 20 20 41 31 31 20 2d |vels..4 A11 -| 000004b0 20 41 64 64 72 65 73 73 20 6c 69 6e 65 20 31 31 | Address line 11| 000004c0 20 3a 20 49 6e 70 75 74 20 77 69 74 68 20 54 54 | : Input with TT| 000004d0 4c 20 6c 65 76 65 6c 73 0d 0d 35 20 20 20 20 41 |L levels..5 A| 000004e0 39 20 2d 20 41 64 64 72 65 73 73 20 6c 69 6e 65 |9 - Address line| 000004f0 20 39 20 3a 20 49 6e 70 75 74 20 77 69 74 68 20 | 9 : Input with | 00000500 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 36 20 20 20 |TTL levels..6 | 00000510 20 44 37 20 2d 20 4d 6f 73 74 20 73 69 67 6e 69 | D7 - Most signi| 00000520 66 69 63 61 6e 74 20 64 61 74 61 20 62 75 73 20 |ficant data bus | 00000530 6c 69 6e 65 20 3a 20 49 6e 70 75 74 2f 4f 75 74 |line : Input/Out| 00000540 70 75 74 20 77 69 74 68 20 54 54 4c 20 6c 65 76 |put with TTL lev| 00000550 65 6c 73 0d 0d 37 20 20 20 20 44 36 20 2d 20 44 |els..7 D6 - D| 00000560 61 74 61 20 62 75 73 20 6c 69 6e 65 20 36 20 3a |ata bus line 6 :| 00000570 20 49 6e 70 75 74 2f 4f 75 74 70 75 74 20 77 69 | Input/Output wi| 00000580 74 68 20 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 38 |th TTL levels..8| 00000590 20 20 20 20 44 35 20 2d 20 44 61 74 61 20 62 75 | D5 - Data bu| 000005a0 73 20 6c 69 6e 65 20 35 20 3a 20 49 6e 70 75 74 |s line 5 : Input| 000005b0 2f 4f 75 74 70 75 74 20 77 69 74 68 20 54 54 4c |/Output with TTL| 000005c0 20 6c 65 76 65 6c 73 0d 0d 39 20 20 20 20 44 34 | levels..9 D4| 000005d0 20 2d 20 44 61 74 61 20 62 75 73 20 6c 69 6e 65 | - Data bus line| 000005e0 20 34 20 3a 20 49 6e 70 75 74 2f 4f 75 74 70 75 | 4 : Input/Outpu| 000005f0 74 20 77 69 74 68 20 54 54 4c 20 6c 65 76 65 6c |t with TTL level| 00000600 73 0d 0d 31 30 20 20 6e 4f 45 32 20 2d 20 4f 75 |s..10 nOE2 - Ou| 00000610 74 70 75 74 20 45 6e 61 62 6c 65 20 3a 20 49 6e |tput Enable : In| 00000620 70 75 74 20 77 69 74 68 20 54 54 4c 20 6c 65 76 |put with TTL lev| 00000630 65 6c 73 0d 20 20 20 20 20 20 54 68 69 73 20 6c |els. This l| 00000640 69 6e 65 20 70 72 6f 76 69 64 65 73 20 61 6e 20 |ine provides an | 00000650 61 64 64 69 74 69 6f 6e 61 6c 20 61 63 74 69 76 |additional activ| 00000660 65 20 6c 6f 77 20 6f 75 74 70 75 74 20 65 6e 61 |e low output ena| 00000670 62 6c 65 20 66 6f 72 20 52 4f 4d 73 0d 69 6e 20 |ble for ROMs.in | 00000680 74 68 65 20 45 6c 65 63 74 72 6f 6e 2e 20 20 54 |the Electron. T| 00000690 68 69 73 20 63 6f 72 72 65 73 70 6f 6e 64 73 20 |his corresponds | 000006a0 74 6f 20 52 4f 4d 20 70 6f 73 69 74 69 6f 6e 20 |to ROM position | 000006b0 31 33 20 61 6e 64 20 63 6f 6e 73 65 71 75 65 6e |13 and consequen| 000006c0 74 6c 79 0d 72 65 73 70 6f 6e 64 73 20 71 75 69 |tly.responds qui| 000006d0 63 6b 6c 79 20 74 6f 20 73 65 72 76 69 63 65 20 |ckly to service | 000006e0 63 61 6c 6c 73 2e 20 20 69 74 20 69 73 20 6c 6f |calls. it is lo| 000006f0 77 20 64 75 72 69 6e 67 20 74 68 65 20 61 63 74 |w during the act| 00000700 69 76 65 20 6c 6f 77 0d 70 6f 72 74 69 6f 6e 20 |ive low.portion | 00000710 6f 66 20 50 48 31 32 2e 20 20 49 74 20 69 73 20 |of PH12. It is | 00000720 6e 6f 74 20 67 75 61 72 61 6e 74 65 65 64 20 74 |not guaranteed t| 00000730 6f 20 62 65 20 68 69 67 68 20 61 74 20 6f 74 68 |o be high at oth| 00000740 65 72 20 74 69 6d 65 73 2e 0d 0d 20 20 20 20 20 |er times... | 00000750 20 4c 50 53 54 42 20 2d 20 4c 69 67 68 74 20 70 | LPSTB - Light p| 00000760 65 6e 20 73 74 72 6f 62 65 0d 20 20 20 20 20 20 |en strobe. | 00000770 41 20 63 6f 6e 6e 65 63 74 69 6f 6e 20 77 69 74 |A connection wit| 00000780 68 20 61 20 70 75 6c 6c 20 75 70 20 74 6f 20 2b |h a pull up to +| 00000790 35 56 20 69 73 20 70 72 6f 76 69 64 65 64 20 74 |5V is provided t| 000007a0 6f 20 74 68 65 20 43 52 54 43 20 6c 69 67 68 74 |o the CRTC light| 000007b0 20 70 65 6e 0d 73 74 72 6f 62 65 20 61 6e 64 20 | pen.strobe and | 000007c0 73 79 73 74 65 6d 20 69 6e 74 65 72 72 75 70 74 |system interrupt| 000007d0 20 73 74 72 75 63 74 75 72 65 2e 20 20 57 68 65 | structure. Whe| 000007e0 6e 20 61 6e 20 6f 6e 2d 62 6f 61 72 64 20 6c 69 |n an on-board li| 000007f0 6e 6b 20 69 73 20 72 65 6d 6f 76 65 64 2c 0d 74 |nk is removed,.t| 00000800 68 69 73 20 63 6f 6e 6e 65 63 74 69 6f 6e 20 69 |his connection i| 00000810 73 20 6d 65 72 65 6c 79 20 61 20 6c 69 6e 6b 20 |s merely a link | 00000820 66 72 6f 6d 20 6f 6e 65 20 63 61 72 74 72 69 64 |from one cartrid| 00000830 67 65 20 74 6f 20 74 68 65 20 6f 74 68 65 72 2e |ge to the other.| 00000840 0d 0d 31 31 20 20 42 41 37 20 2d 20 42 75 66 66 |..11 BA7 - Buff| 00000850 65 72 65 64 20 61 64 64 72 65 73 73 20 6c 69 6e |ered address lin| 00000860 65 20 37 20 3a 20 49 6e 70 75 74 20 77 69 74 68 |e 7 : Input with| 00000870 20 54 54 4c 20 6c 65 76 65 6c 73 0d 20 20 20 20 | TTL levels. | 00000880 20 20 54 68 65 20 62 75 66 66 65 72 65 64 20 61 | The buffered a| 00000890 64 64 72 65 73 73 20 6c 69 6e 65 73 20 68 6f 6c |ddress lines hol| 000008a0 64 20 61 64 64 72 65 73 73 65 73 20 76 61 6c 69 |d addresses vali| 000008b0 64 20 66 6f 72 20 31 32 35 6e 73 20 61 66 74 65 |d for 125ns afte| 000008c0 72 20 50 48 31 32 0d 67 6f 65 73 20 6c 6f 77 2e |r PH12.goes low.| 000008d0 20 20 54 68 65 79 20 61 72 65 20 6e 6f 74 20 62 | They are not b| 000008e0 75 66 66 65 72 65 64 20 6f 72 20 68 65 6c 64 20 |uffered or held | 000008f0 76 61 6c 69 64 20 66 6f 72 20 61 6e 20 65 78 74 |valid for an ext| 00000900 65 6e 64 65 64 20 70 65 72 69 6f 64 20 69 6e 0d |ended period in.| 00000910 74 68 65 20 45 6c 65 63 74 72 6f 6e 2e 0d 0d 31 |the Electron...1| 00000920 32 20 20 42 41 36 20 2d 20 42 75 66 66 65 72 65 |2 BA6 - Buffere| 00000930 64 20 61 64 64 72 65 73 73 20 6c 69 6e 65 20 36 |d address line 6| 00000940 20 3a 20 49 6e 70 75 74 20 77 69 74 68 20 54 54 | : Input with TT| 00000950 4c 20 6c 65 76 65 6c 73 0d 0d 31 33 20 20 42 41 |L levels..13 BA| 00000960 35 20 2d 20 42 75 66 66 65 72 65 64 20 61 64 64 |5 - Buffered add| 00000970 72 65 73 73 20 6c 69 6e 65 20 35 20 3a 20 49 6e |ress line 5 : In| 00000980 70 75 74 20 77 69 74 68 20 54 54 4c 20 6c 65 76 |put with TTL lev| 00000990 65 6c 73 0d 0d 31 34 20 20 42 41 34 20 2d 20 42 |els..14 BA4 - B| 000009a0 75 66 66 65 72 65 64 20 61 64 64 72 65 73 73 20 |uffered address | 000009b0 6c 69 6e 65 20 34 20 3a 20 49 6e 70 75 74 20 77 |line 4 : Input w| 000009c0 69 74 68 20 54 54 4c 20 6c 65 76 65 6c 73 0d 0d |ith TTL levels..| 000009d0 31 35 20 20 42 41 33 20 2d 20 42 75 66 66 65 72 |15 BA3 - Buffer| 000009e0 65 64 20 61 64 64 72 65 73 73 20 6c 69 6e 65 20 |ed address line | 000009f0 33 20 3a 20 49 6e 70 75 74 20 77 69 74 68 20 54 |3 : Input with T| 00000a00 54 4c 20 6c 65 76 65 6c 73 0d 0d 31 36 20 20 42 |TL levels..16 B| 00000a10 41 32 20 2d 20 42 75 66 66 65 72 65 64 20 61 64 |A2 - Buffered ad| 00000a20 64 72 65 73 73 20 6c 69 6e 65 20 32 20 3a 20 49 |dress line 2 : I| 00000a30 6e 70 75 74 20 77 69 74 68 20 54 54 4c 20 6c 65 |nput with TTL le| 00000a40 76 65 6c 73 0d 0d 31 37 20 20 42 41 31 20 2d 20 |vels..17 BA1 - | 00000a50 42 75 66 66 65 72 65 64 20 61 64 64 72 65 73 73 |Buffered address| 00000a60 20 6c 69 6e 65 20 31 20 3a 20 49 6e 70 75 74 20 | line 1 : Input | 00000a70 77 69 74 68 20 54 54 4c 20 6c 65 76 65 6c 73 0d |with TTL levels.| 00000a80 0d 31 38 20 20 42 41 30 20 2d 20 42 75 66 66 65 |.18 BA0 - Buffe| 00000a90 72 65 64 20 61 64 64 72 65 73 73 20 6c 69 6e 65 |red address line| 00000aa0 20 30 20 3a 20 49 6e 70 75 74 20 77 69 74 68 20 | 0 : Input with | 00000ab0 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 31 39 20 20 |TTL levels..19 | 00000ac0 44 30 20 2d 20 44 61 74 61 20 62 75 73 20 6c 69 |D0 - Data bus li| 00000ad0 6e 65 20 30 20 3a 20 49 6e 70 75 74 2f 4f 75 74 |ne 0 : Input/Out| 00000ae0 70 75 74 20 77 69 74 68 20 54 54 4c 20 6c 65 76 |put with TTL lev| 00000af0 65 6c 73 0d 0d 32 30 20 20 44 32 20 2d 20 44 61 |els..20 D2 - Da| 00000b00 74 61 20 62 75 73 20 6c 69 6e 65 20 32 20 3a 20 |ta bus line 2 : | 00000b10 49 6e 70 75 74 2f 4f 75 74 70 75 74 20 77 69 74 |Input/Output wit| 00000b20 68 20 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 32 31 |h TTL levels..21| 00000b30 20 20 44 31 20 2d 20 44 61 74 61 20 62 75 73 20 | D1 - Data bus | 00000b40 6c 69 6e 65 20 31 20 3a 20 49 6e 70 75 74 2f 4f |line 1 : Input/O| 00000b50 75 74 70 75 74 20 77 69 74 68 20 54 54 4c 20 6c |utput with TTL l| 00000b60 65 76 65 6c 73 0d 0d 32 32 20 20 30 56 20 2d 20 |evels..22 0V - | 00000b70 5a 65 72 6f 20 76 6f 6c 74 73 0d 20 20 20 20 20 |Zero volts. | 00000b80 20 54 68 69 73 20 69 73 20 74 68 65 20 65 61 72 | This is the ear| 00000b90 74 68 20 72 65 74 75 72 6e 20 66 6f 72 20 64 69 |th return for di| 00000ba0 67 69 74 61 6c 20 73 69 67 6e 61 6c 73 0d 0d 20 |gital signals.. | 00000bb0 20 20 20 20 20 57 68 65 72 65 20 74 77 6f 20 6f | Where two o| 00000bc0 72 20 6d 6f 72 65 20 63 61 72 74 72 69 64 67 65 |r more cartridge| 00000bd0 73 20 61 72 65 20 66 69 74 74 65 64 2c 20 61 6e |s are fitted, an| 00000be0 79 20 68 6f 73 74 20 63 6f 6d 70 75 74 65 72 20 |y host computer | 00000bf0 6c 69 6e 6b 73 0d 61 66 66 65 63 74 20 41 4c 4c |links.affect ALL| 00000c00 20 63 61 72 74 72 69 64 67 65 73 2e 0d 0d 0d 33 | cartridges....3| 00000c10 2e 30 20 20 4d 65 6d 6f 72 79 20 4d 61 70 0d 0d |.0 Memory Map..| 00000c20 41 6c 6c 20 61 63 63 65 73 73 65 73 20 74 6f 20 |All accesses to | 00000c30 74 68 65 20 63 61 72 74 72 69 64 67 65 73 20 61 |the cartridges a| 00000c40 72 65 20 70 65 72 66 6f 72 6d 65 64 20 61 74 20 |re performed at | 00000c50 32 4d 48 7a 2e 20 20 54 68 65 20 6d 65 6d 6f 72 |2MHz. The memor| 00000c60 79 20 6d 61 70 0d 77 69 74 68 69 6e 20 74 68 65 |y map.within the| 00000c70 20 61 72 65 61 20 26 46 43 30 30 20 74 6f 20 26 | area &FC00 to &| 00000c80 46 44 30 30 20 64 69 66 66 65 72 73 20 62 65 74 |FD00 differs bet| 00000c90 77 65 65 6e 20 74 68 65 20 45 6c 65 63 74 72 6f |ween the Electro| 00000ca0 6e 20 61 6e 64 20 74 68 65 20 4d 61 73 74 65 72 |n and the Master| 00000cb0 0d 31 32 38 3a 0d 0d 0d 33 2e 31 20 20 4d 61 73 |.128:...3.1 Mas| 00000cc0 74 65 72 20 31 32 38 20 4d 65 6d 6f 72 79 20 4d |ter 128 Memory M| 00000cd0 61 70 0d 0d 41 74 20 74 68 65 20 74 69 6d 65 20 |ap..At the time | 00000ce0 6f 66 20 77 72 69 74 69 6e 67 20 74 68 65 20 6d |of writing the m| 00000cf0 65 6d 6f 72 79 20 6d 61 70 20 77 69 74 68 69 6e |emory map within| 00000d00 20 74 68 65 20 61 72 65 61 73 20 49 4e 46 43 20 | the areas INFC | 00000d10 61 6e 64 20 49 4e 46 44 20 69 6e 0d 74 68 65 20 |and INFD in.the | 00000d20 4d 61 73 74 65 72 20 31 32 38 20 63 6f 6d 70 75 |Master 128 compu| 00000d30 74 65 72 20 61 72 65 20 61 73 20 66 6f 6c 6c 6f |ter are as follo| 00000d40 77 73 3a 0d 0d 20 20 20 20 20 20 20 20 26 46 43 |ws:.. &FC| 00000d50 46 46 20 20 20 20 20 20 20 20 20 20 20 50 61 67 |FF Pag| 00000d60 69 6e 67 20 72 65 67 69 73 74 65 72 20 66 6f 72 |ing register for| 00000d70 20 6d 65 6d 6f 72 79 20 69 6e 20 74 68 65 20 26 | memory in the &| 00000d80 38 30 30 30 20 74 6f 20 26 42 46 46 46 0d 20 20 |8000 to &BFFF. | 00000d90 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000da0 20 20 20 20 20 20 72 65 67 69 6f 6e 2e 20 20 20 | region. | 00000db0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000e10 20 20 0d 20 20 20 20 20 20 20 20 20 20 20 20 20 | . | 00000e20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000e30 20 20 20 20 20 0d 50 61 67 69 6e 67 20 6c 6f 67 | .Paging log| 00000e40 69 63 20 68 61 73 20 74 6f 20 62 65 20 69 6d 70 |ic has to be imp| 00000e50 6c 65 6d 65 6e 74 65 64 20 69 6e 20 65 61 63 68 |lemented in each| 00000e60 20 63 61 72 74 72 69 64 67 65 20 61 73 20 6e 65 | cartridge as ne| 00000e70 63 65 73 73 61 72 79 2e 0d 20 20 20 20 20 20 20 |cessary.. | 00000e80 20 26 46 43 38 32 0d 20 20 20 20 20 20 20 20 26 | &FC82. &| 00000e90 46 43 38 31 20 20 20 20 20 20 20 20 20 20 20 53 |FC81 S| 00000ea0 70 65 65 63 68 20 73 79 73 74 65 6d 0d 20 20 20 |peech system. | 00000eb0 20 20 20 20 20 26 46 43 38 30 20 74 6f 20 26 46 | &FC80 to &F| 00000ec0 43 46 45 20 20 52 65 73 65 72 76 65 64 20 66 6f |CFE Reserved fo| 00000ed0 72 20 75 73 65 20 62 79 20 41 63 6f 72 6e 2e 0d |r use by Acorn..| 00000ee0 0d |.| 00000ee1
F/+HINT3.m0
F/+HINT3.m1
F/+HINT3.m2
F/+HINT3.m4
F/+HINT3.m5
.