Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_29.ADF » F/+MCART3
F/+MCART3
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_29.ADF |
| Filename: | F/+MCART3 |
| Read OK: | ✔ |
| File size: | 0AC9 bytes |
| Load address: | 4D204556 |
| Exec address: | 54524143 |
File contents
�..>......*.......*.......*.......*.......*.......*.......*.......*.......*.<
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 an d 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.
3.2 Electron Memory Map
&FC18 to &FC1F Reserved for use by Acorn
&FC28 to &FC2F Reserved for Econet use
&FC30 to &FC3F Reserved for use by Acorn
&FC60 to &FC6F ACIA
&FC70 Analogue to digital converter
&FC71 Parallel printer port
&FC72 Status register
&FC73 ROM scrolling register
&FC78 to &FC7F Laser Disc
&FC80 to &FC8F Test Hardware
&FC90 to &FC9F Sound/Speech
&FCB0 to &FCBF VIA
&FCC0 to &FCCF Floppy Disc Controller
&FCE0 to &FCEF Tube
&FCFF Paged RAM register
00000000 81 2e 2e 3e 2e 2e 2e 2e 2e 2e 2a 2e 2e 2e 2e 2e |...>......*.....| 00000010 2e 2e 2a 2e 2e 2e 2e 2e 2e 2e 2a 2e 2e 2e 2e 2e |..*.......*.....| * 00000040 2e 2e 2a 2e 2e 2e 2e 2e 2e 2e 2a 2e 3c 0d 0d 31 |..*.......*.<..1| 00000050 30 20 6e 4f 45 32 20 2d 20 4f 75 74 70 75 74 20 |0 nOE2 - Output | 00000060 45 6e 61 62 6c 65 20 3a 20 49 6e 70 75 74 20 77 |Enable : Input w| 00000070 69 74 68 20 54 54 4c 20 6c 65 76 65 6c 73 0d 20 |ith TTL levels. | 00000080 20 54 68 69 73 20 6c 69 6e 65 20 70 72 6f 76 69 | This line provi| 00000090 64 65 73 20 61 6e 20 61 64 64 69 74 69 6f 6e 61 |des an additiona| 000000a0 6c 20 61 63 74 69 76 65 20 6c 6f 77 20 6f 75 74 |l active low out| 000000b0 70 75 74 20 65 6e 61 62 6c 65 20 66 6f 72 20 52 |put enable for R| 000000c0 4f 4d 73 20 0d 20 20 69 6e 20 74 68 65 20 45 6c |OMs . in the El| 000000d0 65 63 74 72 6f 6e 2e 20 54 68 69 73 20 63 6f 72 |ectron. This cor| 000000e0 72 65 73 70 6f 6e 64 73 20 74 6f 20 52 4f 4d 20 |responds to ROM | 000000f0 70 6f 73 69 74 69 6f 6e 20 31 33 20 61 6e 64 20 |position 13 and | 00000100 0d 20 20 63 6f 6e 73 65 71 75 65 6e 74 6c 79 20 |. consequently | 00000110 72 65 73 70 6f 6e 64 73 20 71 75 69 63 6b 6c 79 |responds quickly| 00000120 20 74 6f 20 73 65 72 76 69 63 65 20 63 61 6c 6c | to service call| 00000130 73 2e 20 49 74 20 69 73 20 6c 6f 77 20 64 75 72 |s. It is low dur| 00000140 69 6e 67 20 74 68 65 20 0d 20 20 61 63 74 69 76 |ing the . activ| 00000150 65 20 6c 6f 77 20 70 6f 72 74 69 6f 6e 20 6f 66 |e low portion of| 00000160 20 50 48 31 32 2e 0d 20 20 49 74 20 69 73 20 6e | PH12.. It is n| 00000170 6f 74 20 67 75 61 72 61 6e 74 65 65 64 20 74 6f |ot guaranteed to| 00000180 20 62 65 20 68 69 67 68 20 61 74 20 6f 74 68 65 | be high at othe| 00000190 72 20 74 69 6d 65 73 2e 0d 0d 20 20 4c 50 53 54 |r times... LPST| 000001a0 42 20 2d 20 4c 69 67 68 74 20 70 65 6e 20 73 74 |B - Light pen st| 000001b0 72 6f 62 65 0d 20 20 41 20 63 6f 6e 6e 65 63 74 |robe. A connect| 000001c0 69 6f 6e 20 77 69 74 68 20 61 20 70 75 6c 6c 20 |ion with a pull | 000001d0 75 70 20 74 6f 20 2b 35 56 20 69 73 20 70 72 6f |up to +5V is pro| 000001e0 76 69 64 65 64 20 74 6f 20 74 68 65 20 43 52 54 |vided to the CRT| 000001f0 43 20 6c 69 67 68 74 20 70 65 6e 0d 20 20 73 74 |C light pen. st| 00000200 72 6f 62 65 20 61 6e 64 20 73 79 73 74 65 6d 20 |robe and system | 00000210 69 6e 74 65 72 72 75 70 74 20 73 74 72 75 63 74 |interrupt struct| 00000220 75 72 65 2e 20 20 57 68 65 6e 20 61 6e 20 6f 6e |ure. When an on| 00000230 2d 62 6f 61 72 64 20 6c 69 6e 6b 20 69 73 20 20 |-board link is | 00000240 0d 20 20 72 65 6d 6f 76 65 64 2c 20 74 68 69 73 |. removed, this| 00000250 20 63 6f 6e 6e 65 63 74 69 6f 6e 20 69 73 20 6d | connection is m| 00000260 65 72 65 6c 79 20 61 20 6c 69 6e 6b 20 66 72 6f |erely a link fro| 00000270 6d 20 6f 6e 65 20 63 61 72 74 72 69 64 67 65 20 |m one cartridge | 00000280 74 6f 20 74 68 65 20 0d 20 20 6f 74 68 65 72 2e |to the . other.| 00000290 0d 0d 31 31 20 20 42 41 37 20 2d 20 42 75 66 66 |..11 BA7 - Buff| 000002a0 65 72 65 64 20 61 64 64 72 65 73 73 20 6c 69 6e |ered address lin| 000002b0 65 20 37 20 3a 20 49 6e 70 75 74 20 77 69 74 68 |e 7 : Input with| 000002c0 20 54 54 4c 20 6c 65 76 65 6c 73 0d 20 20 20 20 | TTL levels. | 000002d0 54 68 65 20 62 75 66 66 65 72 65 64 20 61 64 64 |The buffered add| 000002e0 72 65 73 73 20 6c 69 6e 65 73 20 68 6f 6c 64 20 |ress lines hold | 000002f0 61 64 64 72 65 73 73 65 73 20 76 61 6c 69 64 20 |addresses valid | 00000300 66 6f 72 20 31 32 35 6e 73 20 61 66 74 65 72 20 |for 125ns after | 00000310 0d 20 20 20 20 50 48 31 32 20 67 6f 65 73 20 6c |. PH12 goes l| 00000320 6f 77 2e 20 20 54 68 65 79 20 61 72 65 20 6e 6f |ow. They are no| 00000330 74 20 62 75 66 66 65 72 65 64 20 6f 72 20 68 65 |t buffered or he| 00000340 6c 64 20 76 61 6c 69 64 20 66 6f 72 20 61 6e 20 |ld valid for an | 00000350 0d 20 20 20 20 65 78 74 65 6e 64 65 64 20 70 65 |. extended pe| 00000360 72 69 6f 64 20 69 6e 20 74 68 65 20 45 6c 65 63 |riod in the Elec| 00000370 74 72 6f 6e 2e 0d 0d 31 32 20 20 42 41 36 20 2d |tron...12 BA6 -| 00000380 20 42 75 66 66 65 72 65 64 20 61 64 64 72 65 73 | Buffered addres| 00000390 73 20 6c 69 6e 65 20 36 20 3a 20 49 6e 70 75 74 |s line 6 : Input| 000003a0 20 77 69 74 68 20 54 54 4c 20 6c 65 76 65 6c 73 | with TTL levels| 000003b0 0d 0d 31 33 20 20 42 41 35 20 2d 20 42 75 66 66 |..13 BA5 - Buff| 000003c0 65 72 65 64 20 61 64 64 72 65 73 73 20 6c 69 6e |ered address lin| 000003d0 65 20 35 20 3a 20 49 6e 70 75 74 20 77 69 74 68 |e 5 : Input with| 000003e0 20 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 31 34 20 | TTL levels..14 | 000003f0 20 42 41 34 20 2d 20 42 75 66 66 65 72 65 64 20 | BA4 - Buffered | 00000400 61 64 64 72 65 73 73 20 6c 69 6e 65 20 34 20 3a |address line 4 :| 00000410 20 49 6e 70 75 74 20 77 69 74 68 20 54 54 4c 20 | Input with TTL | 00000420 6c 65 76 65 6c 73 0d 0d 31 35 20 20 42 41 33 20 |levels..15 BA3 | 00000430 2d 20 42 75 66 66 65 72 65 64 20 61 64 64 72 65 |- Buffered addre| 00000440 73 73 20 6c 69 6e 65 20 33 20 3a 20 49 6e 70 75 |ss line 3 : Inpu| 00000450 74 20 77 69 74 68 20 54 54 4c 20 6c 65 76 65 6c |t with TTL level| 00000460 73 0d 0d 31 36 20 20 42 41 32 20 2d 20 42 75 66 |s..16 BA2 - Buf| 00000470 66 65 72 65 64 20 61 64 64 72 65 73 73 20 6c 69 |fered address li| 00000480 6e 65 20 32 20 3a 20 49 6e 70 75 74 20 77 69 74 |ne 2 : Input wit| 00000490 68 20 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 31 37 |h TTL levels..17| 000004a0 20 20 42 41 31 20 2d 20 42 75 66 66 65 72 65 64 | BA1 - Buffered| 000004b0 20 61 64 64 72 65 73 73 20 6c 69 6e 65 20 31 20 | address line 1 | 000004c0 3a 20 49 6e 70 75 74 20 77 69 74 68 20 54 54 4c |: Input with TTL| 000004d0 20 6c 65 76 65 6c 73 0d 0d 31 38 20 20 42 41 30 | levels..18 BA0| 000004e0 20 2d 20 42 75 66 66 65 72 65 64 20 61 64 64 72 | - Buffered addr| 000004f0 65 73 73 20 6c 69 6e 65 20 30 20 3a 20 49 6e 70 |ess line 0 : Inp| 00000500 75 74 20 77 69 74 68 20 54 54 4c 20 6c 65 76 65 |ut with TTL leve| 00000510 6c 73 0d 0d 31 39 20 20 44 30 20 2d 20 44 61 74 |ls..19 D0 - Dat| 00000520 61 20 62 75 73 20 6c 69 6e 65 20 30 20 3a 20 49 |a bus line 0 : I| 00000530 6e 70 75 74 2f 4f 75 74 70 75 74 20 77 69 74 68 |nput/Output with| 00000540 20 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 32 30 20 | TTL levels..20 | 00000550 20 44 32 20 2d 20 44 61 74 61 20 62 75 73 20 6c | D2 - Data bus l| 00000560 69 6e 65 20 32 20 3a 20 49 6e 70 75 74 2f 4f 75 |ine 2 : Input/Ou| 00000570 74 70 75 74 20 77 69 74 68 20 54 54 4c 20 6c 65 |tput with TTL le| 00000580 76 65 6c 73 0d 0d 32 31 20 20 44 31 20 2d 20 44 |vels..21 D1 - D| 00000590 61 74 61 20 62 75 73 20 6c 69 6e 65 20 31 20 3a |ata bus line 1 :| 000005a0 20 49 6e 70 75 74 2f 4f 75 74 70 75 74 20 77 69 | Input/Output wi| 000005b0 74 68 20 54 54 4c 20 6c 65 76 65 6c 73 0d 0d 32 |th TTL levels..2| 000005c0 32 20 20 30 56 20 2d 20 5a 65 72 6f 20 76 6f 6c |2 0V - Zero vol| 000005d0 74 73 0d 20 20 20 20 54 68 69 73 20 69 73 20 74 |ts. This is t| 000005e0 68 65 20 65 61 72 74 68 20 72 65 74 75 72 6e 20 |he earth return | 000005f0 66 6f 72 20 64 69 67 69 74 61 6c 20 73 69 67 6e |for digital sign| 00000600 61 6c 73 0d 0d 57 68 65 72 65 20 74 77 6f 20 6f |als..Where two o| 00000610 72 20 6d 6f 72 65 20 63 61 72 74 72 69 64 67 65 |r more cartridge| 00000620 73 20 61 72 65 20 66 69 74 74 65 64 2c 20 61 6e |s are fitted, an| 00000630 79 20 68 6f 73 74 20 63 6f 6d 70 75 74 65 72 20 |y host computer | 00000640 6c 69 6e 6b 73 20 61 66 66 65 63 74 0d 41 4c 4c |links affect.ALL| 00000650 20 63 61 72 74 72 69 64 67 65 73 2e 0d 0d 33 2e | cartridges...3.| 00000660 30 20 20 4d 65 6d 6f 72 79 20 4d 61 70 0d 0d 41 |0 Memory Map..A| 00000670 6c 6c 20 61 63 63 65 73 73 65 73 20 74 6f 20 74 |ll accesses to t| 00000680 68 65 20 63 61 72 74 72 69 64 67 65 73 20 61 72 |he cartridges ar| 00000690 65 20 70 65 72 66 6f 72 6d 65 64 20 61 74 20 32 |e performed at 2| 000006a0 4d 48 7a 2e 20 20 54 68 65 20 6d 65 6d 6f 72 79 |MHz. The memory| 000006b0 20 6d 61 70 0d 77 69 74 68 69 6e 20 74 68 65 20 | map.within the | 000006c0 61 72 65 61 20 26 46 43 30 30 20 74 6f 20 26 46 |area &FC00 to &F| 000006d0 44 30 30 20 64 69 66 66 65 72 73 20 62 65 74 77 |D00 differs betw| 000006e0 65 65 6e 20 74 68 65 20 45 6c 65 63 74 72 6f 6e |een the Electron| 000006f0 20 61 6e 20 64 20 74 68 65 0d 4d 61 73 74 65 72 | an d the.Master| 00000700 20 31 32 38 3a 0d 0d 33 2e 31 20 20 4d 61 73 74 | 128:..3.1 Mast| 00000710 65 72 20 31 32 38 20 4d 65 6d 6f 72 79 20 4d 61 |er 128 Memory Ma| 00000720 70 0d 0d 41 74 20 74 68 65 20 74 69 6d 65 20 6f |p..At the time o| 00000730 66 20 77 72 69 74 69 6e 67 20 74 68 65 20 6d 65 |f writing the me| 00000740 6d 6f 72 79 20 6d 61 70 20 77 69 74 68 69 6e 20 |mory map within | 00000750 74 68 65 20 61 72 65 61 73 20 49 4e 46 43 20 61 |the areas INFC a| 00000760 6e 64 20 49 4e 46 44 20 69 6e 0d 74 68 65 20 4d |nd INFD in.the M| 00000770 61 73 74 65 72 20 31 32 38 20 63 6f 6d 70 75 74 |aster 128 comput| 00000780 65 72 20 61 72 65 20 61 73 20 66 6f 6c 6c 6f 77 |er are as follow| 00000790 73 3a 0d 0d 20 20 26 46 43 46 46 20 20 20 20 20 |s:.. &FCFF | 000007a0 20 20 20 20 20 20 50 61 67 69 6e 67 20 72 65 67 | Paging reg| 000007b0 69 73 74 65 72 20 66 6f 72 20 6d 65 6d 6f 72 79 |ister for memory| 000007c0 20 69 6e 20 74 68 65 20 26 38 30 30 30 20 74 6f | in the &8000 to| 000007d0 20 26 42 46 46 46 0d 20 20 20 20 20 20 20 20 20 | &BFFF. | 000007e0 20 20 20 20 20 20 20 20 20 72 65 67 69 6f 6e 2e | region.| 000007f0 50 61 67 69 6e 67 20 6c 6f 67 69 63 20 68 61 73 |Paging logic has| 00000800 20 74 6f 20 62 65 20 69 6d 70 6c 65 6d 65 6e 74 | to be implement| 00000810 65 64 20 69 6e 20 65 61 63 68 20 0d 20 20 20 20 |ed in each . | 00000820 20 20 20 20 20 20 20 20 20 20 20 20 20 20 63 61 | ca| 00000830 72 74 72 69 64 67 65 20 61 73 20 6e 65 63 65 73 |rtridge as neces| 00000840 73 61 72 79 2e 0d 20 20 26 46 43 38 32 0d 20 20 |sary.. &FC82. | 00000850 26 46 43 38 31 20 20 20 20 20 20 20 20 20 20 20 |&FC81 | 00000860 53 70 65 65 63 68 20 73 79 73 74 65 6d 0d 20 20 |Speech system. | 00000870 26 46 43 38 30 20 74 6f 20 26 46 43 46 45 20 20 |&FC80 to &FCFE | 00000880 52 65 73 65 72 76 65 64 20 66 6f 72 20 75 73 65 |Reserved for use| 00000890 20 62 79 20 41 63 6f 72 6e 2e 0d 0d 33 2e 32 20 | by Acorn...3.2 | 000008a0 20 45 6c 65 63 74 72 6f 6e 20 4d 65 6d 6f 72 79 | Electron Memory| 000008b0 20 4d 61 70 0d 0d 20 20 26 46 43 31 38 20 74 6f | Map.. &FC18 to| 000008c0 20 26 46 43 31 46 20 20 52 65 73 65 72 76 65 64 | &FC1F Reserved| 000008d0 20 66 6f 72 20 75 73 65 20 62 79 20 41 63 6f 72 | for use by Acor| 000008e0 6e 0d 20 20 26 46 43 32 38 20 74 6f 20 26 46 43 |n. &FC28 to &FC| 000008f0 32 46 20 20 52 65 73 65 72 76 65 64 20 66 6f 72 |2F Reserved for| 00000900 20 45 63 6f 6e 65 74 20 75 73 65 0d 20 20 26 46 | Econet use. &F| 00000910 43 33 30 20 74 6f 20 26 46 43 33 46 20 20 52 65 |C30 to &FC3F Re| 00000920 73 65 72 76 65 64 20 66 6f 72 20 75 73 65 20 62 |served for use b| 00000930 79 20 41 63 6f 72 6e 0d 20 20 26 46 43 36 30 20 |y Acorn. &FC60 | 00000940 74 6f 20 26 46 43 36 46 20 20 41 43 49 41 0d 20 |to &FC6F ACIA. | 00000950 20 26 46 43 37 30 20 20 20 20 20 20 20 20 20 20 | &FC70 | 00000960 20 41 6e 61 6c 6f 67 75 65 20 74 6f 20 64 69 67 | Analogue to dig| 00000970 69 74 61 6c 20 63 6f 6e 76 65 72 74 65 72 0d 20 |ital converter. | 00000980 20 26 46 43 37 31 20 20 20 20 20 20 20 20 20 20 | &FC71 | 00000990 20 50 61 72 61 6c 6c 65 6c 20 70 72 69 6e 74 65 | Parallel printe| 000009a0 72 20 70 6f 72 74 0d 20 20 26 46 43 37 32 20 20 |r port. &FC72 | 000009b0 20 20 20 20 20 20 20 20 20 53 74 61 74 75 73 20 | Status | 000009c0 72 65 67 69 73 74 65 72 0d 20 20 26 46 43 37 33 |register. &FC73| 000009d0 20 20 20 20 20 20 20 20 20 20 20 52 4f 4d 20 73 | ROM s| 000009e0 63 72 6f 6c 6c 69 6e 67 20 72 65 67 69 73 74 65 |crolling registe| 000009f0 72 0d 20 20 26 46 43 37 38 20 74 6f 20 26 46 43 |r. &FC78 to &FC| 00000a00 37 46 20 20 4c 61 73 65 72 20 44 69 73 63 0d 20 |7F Laser Disc. | 00000a10 20 26 46 43 38 30 20 74 6f 20 26 46 43 38 46 20 | &FC80 to &FC8F | 00000a20 20 54 65 73 74 20 48 61 72 64 77 61 72 65 0d 20 | Test Hardware. | 00000a30 20 26 46 43 39 30 20 74 6f 20 26 46 43 39 46 20 | &FC90 to &FC9F | 00000a40 20 53 6f 75 6e 64 2f 53 70 65 65 63 68 0d 20 20 | Sound/Speech. | 00000a50 26 46 43 42 30 20 74 6f 20 26 46 43 42 46 20 20 |&FCB0 to &FCBF | 00000a60 56 49 41 0d 20 20 26 46 43 43 30 20 74 6f 20 26 |VIA. &FCC0 to &| 00000a70 46 43 43 46 20 20 46 6c 6f 70 70 79 20 44 69 73 |FCCF Floppy Dis| 00000a80 63 20 43 6f 6e 74 72 6f 6c 6c 65 72 0d 20 20 26 |c Controller. &| 00000a90 46 43 45 30 20 74 6f 20 26 46 43 45 46 20 20 54 |FCE0 to &FCEF T| 00000aa0 75 62 65 0d 20 20 26 46 43 46 46 20 20 20 20 20 |ube. &FCFF | 00000ab0 20 20 20 20 20 20 50 61 67 65 64 20 52 41 4d 20 | Paged RAM | 00000ac0 72 65 67 69 73 74 65 72 0d |register.| 00000ac9
F/+MCART3.m0
F/+MCART3.m1
F/+MCART3.m2
F/+MCART3.m4
F/+MCART3.m5
.