The Memory of PC-1350

Index

• Program Area
• Line Structure
• Variable Structure
• Display Access
• System Area
  • System Variables
  • Other Memory Locations
  • System Addresses
  • The ROM
    • CALL addresses

• The program area starts at 24576 and ends at 27695. Inserted memory is additional and the RAM will start earlier. The rest of the memory belongs to the system!
• 8 kB card inserted: The program area starts at 8192 and 16384. Both 8 kB blocks content the same data. They are mapped.
• 16 kB card inserted: The program area starts only at 8192.
• The first BASIC line starts at 24624, 16432, 8240 (without card, 8 kB, 16 kB card). You can shift this position to make space for data. The RAM addresses 28417 and 28418 define this position: PEEK 28417+256* PEEK 28418 = start address. At this address there must be a byte with a value of 255, then the first line starts.
• The end of the BASIC area is marked with a 255, too. This address is given through the pointer at 28419 and 28420.
• Address of the BASIC end = PEEK 28419+ 256* PEEK 28420

3 bytes (x,y,z), data, return (Chr 13)
x,y: line number = x*256+y
z: length of data (return included)
End of program Chr (255)
If a byte in the data of a line has an ASCII code above 127 it will appear as a BASIC command.

7 bytes (a,b,c,d,e,f,g), Data
In PEEK 28423+256* PEEK 28424 the start address of the variables is stored.
Variables are written from behind, this means that a new variable is written before the older variables. The start address points to the header of the newest variable.
You can rename variables using POKE!

Header structure:

7 bytes lengthy

Example:
G$(5,5)*3
a: 71 = G: variable name
b: 160 = String
c: 0 = 1.Byte * 256
d: 111 = + 2.Byte = Overall length + 3 (because of following DIM values)
e: 5 = Dim 5
f: 5 = , 5
g: 3 = * 3
DATA: 71 = 1. character data

Meaning of the second header byte:

1-26 = Stringarray, 2 character name with second character = Chr (Byte+64)
193-218 = Number array, 2 character name with second char = Chr (Byte-128)
129-154 = String, 2 character name [Chr (Byte-64)] variable (like NE$="test") always 16 bytes lengthy
65-90 = Number, 2 character name [Chr (Byte)] (like AA=0) always 8 byte lengthy
128: One character name number array
160: One character name string array

Data of a variable:

Strings contain each character as a byte in ASCII code, Chr(0) is the end of a string. The Chr(0) is not used when the text is as long as the variable is dimensioned.
Numbers are stored in the BCD format. Each number needs 7 bytes.
In an array the single variables are following without any divider character. The position of such a variable is calculated using the header data. In a twodimensional array the arrays are following in a similar way: DIM B$(1,2)*1: B$(0,0) B$(0,1) B$(0,2) B$(1,0) B$(1,1) B$(1,2).

There are 5 columns with each 30 pixels width in 4 lines á 8 pixels. Each stripe of 8 pixel is like a "GPRINT" byte, the value 1 will set the top pixel and 128 the bottom pixel! The distance of the memory locations of each column is 512 bytes.

SHARP  POCKET COMPUTER PC-1350 1: 28672..28701 1: +512 29184..29213 1: +1024 29696..29725 1: +1536 30208..30237 1: +2048 30720..30749 2: 28736..28765 2: 29248..29277 2: 29760..29789 2: 30272..30301 2: 30784..30813 3: 28702..28731 3: 29214..29243 3: 29726..29755 3: 30238..30267 3: 30750..30779 4: 28766..28795 4: 29278..29307 4: 29790..29819 4: 30302..30331 4: 30814..30843

The symbols RUN, PRO, SHIFT, SML are set in byte 30780:

Bit	Symbol
0	Shift
1	Def
2	-
3	-
4	Run
5	Pro
6	Japan. symbols left: Makes the keys work odd!
7	Sml

-	System variables (each 8 bytes long): Var Address HB LB Z 27696 108 48 Y 27704 108 56 X 27712 108 64 W 27720 108 72 V 27728 108 80 U 27736 108 88 T 27744 108 96 S 27752 108 104 R 27760 108 112 Q 27768 108 120 P 27776 108 128 O 27784 108 136 N 27792 108 144 M 27800 108 152 L 27808 108 160 K 27816 108 168 J 27824 108 176 I 27832 108 184 H 27840 108 192 G 27848 108 200 F 27856 108 208 E 27864 108 216 D 27872 108 224 C 27880 108 232 B 27888 108 240 A 27896 108 248 The first byte of each variable is CHR 245 when containing a string or CHR 0 when containing a number. If the string is shorter than 7 characters, a Chr(0) is added at the end!
-	Reserve mode data: 28527:A:first reserve entry, Chr (alphabetical number) marks beginning (A=1,S=19,D=4,...,' '=27,'='=28), then data without any ending code. Example: [1,254,34],[19,...],... Order:ASDFGHJKL'='' 'MNBVCXZ, empty entries are not stored (not even the start code 1-28!). End of reserve mode area: 28671
-	System addresses: LB HB Description 28417 28418 Points to the byte 255 before the BASIC area 28419 28420 Points to the byte 255 after the BASIC area 28423 28424 Points to the defined variable area 28503 - Input buffer: The last pressed key 28426 bis 28432 Password in ASCII code 28435 - 2: WAIT active, 6: WAIT inactive 28436 - 0-31: Password inactive, 32-63 password active 28448 28449 Points to the next byte after the last executed BASIC command 28336 bis 28415 In-/Outputbuffer 80 bytes 27904 bis 27999 Display buffer in ASCII codes 28166 28167 1. FOR NEXT: Points to the byte before the address of the loop variable 28168 bis 28174 1. FOR NEXT: End count of loop in BCD format 28175 bis 28181 1. FOR NEXT: STEP value in BCD format 28182 28183 1. FOR NEXT: Points to the byte after the FOR .. TO (STEP) block 28184 28185 2. FOR NEXT: Points to the byte before the address of the loop variable 28186 bis 28192 2. FOR NEXT: End count of loop in BCD format 28193 bis 28199 2. FOR NEXT: STEP value in BCD format 28200 28201 2. FOR NEXT: Points to the byte after the FOR .. TO (STEP) block 28202 28203 3. FOR NEXT: Points to the byte before the address of the loop variable 28204 bis 28210 3. FOR NEXT: End count of loop in BCD format 28211 bis 28217 3. FOR NEXT: STEP value in BCD format 28218 28219 3. FOR NEXT: Points to the byte after the FOR .. TO (STEP) block 28220 28221 4. FOR NEXT: Points to the byte before the address of the loop variable 28222 bis 28228 4. FOR NEXT: End count of loop in BCD format 28229 bis 28235 4. FOR NEXT: STEP value in BCD format 28236 28237 4. FOR NEXT: Points to the byte after the FOR .. TO (STEP) block 28238 28239 5. FOR NEXT: Points to the byte before the address of the loop variable 28240 bis 28246 5. FOR NEXT: End count of loop in BCD format 28247 bis 28253 5. FOR NEXT: STEP value in BCD format 28254 28255 5. FOR NEXT: Points to the byte after the FOR .. TO (STEP) block 28459 - Number of the running FOR..NEXT loop: 6=0, 24=1, 42=2, 60=3, 78=4, 96=5 28460 - Number of the running GOSUB..RETURN block: 144=0, 146=1, 148=2, ... 164=10 28816 28817 Return address for the 1. GOSUB..RETURN block 28818 28819 Return address for the 1. GOSUB..RETURN block 28820 28821 Return address for the 1. GOSUB..RETURN block 28822 28823 Return address for the 1. GOSUB..RETURN block 28824 28825 Return address for the 1. GOSUB..RETURN block 28826 28827 Return address for the 1. GOSUB..RETURN block 28828 28829 Return address for the 1. GOSUB..RETURN block 28830 28831 Return address for the 1. GOSUB..RETURN block 28832 28833 Return address for the 1. GOSUB..RETURN block 28834 28835 Return address for the 1. GOSUB..RETURN block 28851 28852 WAIT interval 30780 - Display symbols (see above)
-	The ROM: The PC-1350 has a ROM, which contains the operating system. The ROM of the CPU is at &0000 to &1FFF, the external ROM at &8000 to &FFFF. If you know the system calls you can use functions of the system in your programs! Token Command CALL address 153 ABS 2954 158 ACS 2954 161 AND 2954 225 AREAD 50108 164 ASC 2954 157 ASN 2954 159 ATN 2954 236 BASIC 47228 196 BEEP 49403 204 CALL 49455 229 CHAIN 38348 168 CHR$ 2954 201 CLEAR 47787 183 CLOAD 38439 188 CLOSE 64131 206 CLS 55564 191 CONSOLE 34143 178 CONT 50136 150 COS 2954 182 CSAVE 38055 207 CURSOR 55441 220 DATA 50108 155 DEG 35307 193 DEGREE 49983 203 DIM 48466 156 DMS 35314 216 END 49897 147 EXP 2954 213 FOR 48612 230 GCURSOR 60134 224 GOSUB 49137 198 GOTO 49075 231 GPRINT 59439 195 GRAD 49999 212 IF 49736 173 INKEY$ 2954 223 INPUT 50168 152 INT 2954 171 LEFT$ 2954 166 LEN 2954 214 LET 49255 232 LINE 58798 180 LIST 50355 181 LLIST 50605 145 LN 2954 190 LOAD 62275 146 LOG 2954 226 LPRINT 50526 175 MEM 2954 184 MERGE 38480 170 MID$ 2954 177 NEW 48040 217 NEXT 48782 163 NOT 2954 211 ON 50007 187 OPEN 63806 238 OPEN$ 2954 162 OR 2954 179 PASS 47838 221 PAUSE 52835 167 PEEK 2954 174 PI 2954 233 POINT 2954 205 POKE 49498 235 PRESET 60044 222 PRINT 53217 234 PSET 60053 194 RADIAN 49991 192 RANDOM 49400 219 READ 49563 215 REM 49796 228 RESTORE 49695 227 RETURN 49807 172 RIGHT$ 2954 160 RND 2954 176 RUN 47664 189 SAVE 62055 154 SGN 2954 149 SIN 2954 148 SQR 2954 209 STEP 4332 218 STOP 49934 169 STR$ 2954 151 TAN 2954 237 TEXT 47434 210 THEN 4332 208 TO 4332 200 TROFF 49942 199 TRON 49938 202 USING 50481 165 VAL 2954 197 WAIT 49946 The token is the value of the byte which represents this command in a BASIC line. CALL addresses Address Description Changed registers Changed int. RAM 4618 Getkey: If you press a key the ASCII code will be stored at 28503 and in A P,Q,DP,I,A,B,X,Y,K,L,V 2..23,92 3003 Inkey: If you press a key the code will be stored at [++Y] P,Q,DP,A,B,X,Y,K,L,V 10..21,23,34,37..39,55..63,92 53958 Print: Prints the ASCII characters from the display buffer like CURSOR(K,A), A=1,2 are the lower two lines and A=3,4 the upper. P,Q,DP,A,B,X,Y,K,L,W 2..39 32852 LPrint: Prints the characters in internal RAM addresses 16..39 on the CE-126P. Chr(13) makes a new line. P,Q,DP,A,B,K,L 2,3,8,9,92..95 1240 Off: Switches the computer off. Switch it on again with On/Brk all all 2379 Beep short: If the bit 0 in A is set, 2 kHz else 4 kHz. To stop the beeper use LIP 95, ANIM 239, OUTC P,Q,A 2,95 49430 Beep long: Beeps with 4 kHz and doesn't need to be stopped. unknown unknown