fixed pins configuration on address decoder && limited ROM address space
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flowenol
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8e4d0173ef
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5397de153e
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@ -14,7 +14,7 @@ need some other standard. The best way to connect the device to a regular modern
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| address | function |
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| --- | --- |
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| `$C100-$CFFF` | address space reserved for on-board ROM |
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| `$C100-$C7FF` | address space reserved for on-board ROM |
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| `$C100` | the original ACI loader program adapted to the A1SI |
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| `$C300` | "teletype on apple-1" test program - the data from remote terminal appears on Apple-1 screen |
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| `$C400` | "teletype on remote" test program - the data from Apple-1 appears on remote terminal |
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@ -30,7 +30,7 @@ entries for programmers:
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| `$C081` | write address - the location for data to be written via the interface, first write to this address switches the device to write mode |
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| `$C23A` | software reset routine - resets the MCU |
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| `$C1EC` | block read routine - reads data from the interface to the specified address range |
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| `$C213` | block write routine - writes the data via the interface from the specified address range |
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| `$C213` | block write routine - writes the data from the specified address range via the interface |
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| `$0034` | lower byte of the end address for block read/write routines |
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| `$0035` | upper byte of the end address for block read/write routines |
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| `$0036` | lower byte of the beginning address for block read/write routines |
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@ -2,20 +2,19 @@
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GAL20V8
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EQN2JED - Boolean Equations to JEDEC file assembler (Version V101)
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Copyright (c) National Semiconductor Corporation 1990-1993
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Assembled from "d:/APPLE1~2/ADDRES~1.EQN". Date: 12-28-120
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Assembled from "c:\ADDRES~1.EQN". Date: 3-4-121
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*
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NOTE PINS RW:2 A8:3 A7:4 A6:5 A5:6 A4:7 A3:8 A2:9 A1:10 A0:11*
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NOTE PINS GND:12 A9:14 A10:15 A11:16 SR:17 RD:18 WD:19 ROM:20*
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NOTE PINS GND:12 A11:14 A10:15 A9:16 SR:17 RD:18 WD:19 ROM:20*
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NOTE PINS RES:21 PHI:22 R:23 VCC:24*
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NOTE GALMODE SMALL*
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QF2706*QP24*F0*
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L0320
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0111101010111011101110111010101010100111*
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L0640
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0111011011111111111111111111111111111111
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0111111011111111111111111111111111011111
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0111111011111111111111111111110111111111
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0111111011111111111111111101111111111111
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0111011011111111111111111111111111101111
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0111111011111111111111111101111111101111
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0111111011111111111111111111110111101111
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0111101001110111011101110110011011101111*
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L0960
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1011101001011011101110111010101010100111*
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@ -28,8 +27,8 @@ L2560
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L2632
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10000011*
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L2640
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0000000010000000111110001000000010000000100000000000000000000000*
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0000000010000000111100001000000010000000100000000000000000000000*
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L2704
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10*
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C236B*
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C1ECD*
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0000
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@ -1,7 +1,7 @@
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EQN2JED - Boolean Equations to JEDEC file assembler (Version V101)
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Copyright (c) National Semiconductor Corporation 1990-1993
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Log file for d:/APPLE1~2/ADDRES~1.EQN
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Log file for c:\ADDRES~1.EQN
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Device: 20V8
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Pin Label Type
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@ -17,9 +17,9 @@ Pin Label Type
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10 A1 pos,com input
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11 A0 pos,com input
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12 GND ground pin
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14 A9 pos,com input
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14 A11 pos,com input
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15 A10 pos,com input
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16 A11 pos,com input
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16 A9 pos,com input
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17 SR pos,com output
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18 RD pos,com output
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19 WD pos,com output
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@ -43,12 +43,12 @@ No of feedbacks used as dedicated outputs : 3/6 (50.0%)
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Pin Label Terms Usage
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------------------------------------------
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21 RES 1/8 (12.5%)
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20 ROM 5/8 (62.5%)
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20 ROM 4/8 (50.0%)
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19 WD 1/8 (12.5%)
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18 RD 1/8 (12.5%)
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17 SR 1/8 (12.5%)
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------------------------------------------
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Total Terms 9/64 (14.1%)
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Total Terms 8/64 (12.5%)
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------------------------------------------
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EQN2JED - Boolean Equations to JEDEC file assembler (Version V101)
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@ -66,8 +66,8 @@ Copyright (c) National Semiconductor Corporation 1990-1993
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A5 | 6 19 | WD
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A4 | 7 18 | RD
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A3 | 8 17 | SR
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A2 | 9 16 | A11
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A2 | 9 16 | A9
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A1 | 10 15 | A10
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A0 | 11 14 | A9
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GND | 12 13 |
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A0 | 11 14 | A11
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GND | 12 13 |
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|______________|
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@ -1,7 +1,7 @@
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chip GAL20V8
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NC3=1 RW=2 A0=11 A1=10 A2=9 A3=8 A4=7 A5=6 A6=5 A7=4 A8=3 GND=12
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A9=14 A10=15 A11=16 SR=17 RD=18 WD=19 ROM=20 RES=21 PHI=22
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A9=16 A10=15 A11=14 SR=17 RD=18 WD=19 ROM=20 RES=21 PHI=22
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R=23 VCC=24
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equations
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@ -9,9 +9,8 @@ equations
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SR = /A0 * /A1 * /A2 * /A3 * /A4 * /A5 * /A6 * /A7 * /A8 * /A9 * /A10 * /A11 * /R * RW
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RD = /A0 * /A1 * /A2 * /A3 * /A4 * /A5 * /A6 * A7 * /A8 * /A9 * /A10 * /A11 * /R * RW
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WD = A0 * /A1 * /A2 * /A3 * /A4 * /A5 * /A6 * A7 * /A8 * /A9 * /A10 * /A11 * /R * /RW * PHI
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/ROM = A8 * /R * RW
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+ A9 * /R * RW
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+ A10 * /R * RW
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+ A11 * /R * RW
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/ROM = /A11 * A8 * /R * RW
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+ /A11 * A9 * /R * RW
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+ /A11 * A10 * /R * RW
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+ A2 * A3 * A4 * A5 * A6 * A7 * /A8 * /A9 * /A10 * /A11 * /R * RW
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RES = A0 * /A1 * /A2 * /A3 * /A4 * /A5 * /A6 * /A7 * /A8 * /A9 * /A10 * /A11 * /R * RW
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