System description and routines PC-1350 / PC-1360

System description and routines PC-1350 / PC-1360

Sharp PC-1350/PC-1360 system description

Organization of the PC-1350 system memory:

Memory:
Display memeory:

In the display memory (&7000-&78FF) no program execution is possible. In the memory that's not used for the display data can be stored.
In general the second block of 256 byte (e.g. &7100-&71FF) is a mirror of the first block (e.g. &7000-&70FF).
The ports and the system usage of this ram is shown in the following sections.

A memory card uses address area from &2000-&5FFF.
Depening on the system configuration basic uses the internal ram and the ram form a memory card in different ways.
The configuariotn of the memory can be shown by using the command MEM$ and can be changed using the command MEM "B"/"C".

Without memory card:

MEM "C" The internal ram is used for basic program, variables and system area.
With memory card:

MEM "B" The internal ram and the memeory card are used for basic program and variables.

MEM "C" The memory card is used for basic program and variables.

Memeory access when using assebler code:
Some of the ROM and RAM can't be accessed with all accessing method available by the CPU.

address	description	access (read)
0000-1FFF	int. ROM	(AE) / not with S, X
2000-5FFF	ram-card	S, X and (AE)
6000-6FFF	int. ROM	S, X and (AE)
7000-7FFF	display/ports	S, X / not with (AE)
8000-FFFF	ext. ROM	S, X and (AE)

ROM version:
There are (at least) two known ROM versions of the PC-1350. You can test the version of your own PC-1350 by calling PEEK &FFF0

Version	Result of PEEK &FFF0
v0	CE (Decimal: 206)
v1	03 (Decimal: 3)

Organization of the PC-1360 system memory:

Memory:
Display memory:

In the display memory (&2800-&30FF) no program execution is possible. In the memory that's not used for the display data can be stored.
In general the second block of 256 byte (e.g. &2900-&29FF) is a mirror of the first block (e.g. &2800-&28FF.
The ports and the system usage of this ram is shown in the following sections.

The memory card in slot 1 is mapped to ram bank 0, the card n slot 2 to ram bank 1.
Depening on the system configuration basic uses the ram card in different ways.
The configuariotn of the memory can be shown by using the command MEM$ and can be changed using the command SET MEM "B"/"C"/"D".

One memory card in slot 1:

SET MEM "C" Card in slot 1 is used for basic program, variables and system area.

With two memor cards:

SET MEM "B"	Cards in slot 1+2 are used for basic program and variables. The system area is in slot 2.
SET MEM "C"	Card in slot 1 is used for basic program, variables and system area.
SET MEM "D"	Card in slot 1 is used for basic program, card in slot 2 is used for variables and system area.

Memeory access when using assebler code:
Some of the ROM and ram can't be accessed with all accessing method available by the CPU.

address	description	access (read)
0000-1FFF	int. ROM	(AE) / not with S, X
2000-3FFF	display/ports	S, X / not with (AE)
4000-7FFF	ext. ROM	S, X and (AE)
8000-FFFF	ram-card	S, X and (AE)

ROM version:
There are (at least) three known ROM versions of the PC-1360. You can test the version of your own PC-1360 by calling PEEK &7FFF

Version	Ergebnis von PEEK &7FFF
1	01 (Dezimal: 1)
3	03 (Dezimal: 3)
5	05 (Dezimal: 5)

System ram

Introduction
The following ram area is used by the basic of the PC-1350/PC-1360.

RAM PC-1350/PC-1360

address PC-1350	address PC-1360	len	description
	283C	2	TEXT BOTTOM; max address for the basic program
	283E	2	VARIABLE BOTTOM; minimum address for variables created with DIM.
70B3	287E	2	WAIT-interval
	2A7E	2	counter for auto power off
	2A80	24	manual display buffer (output in RUN mode)
7480	2A98	24	print buffer for CE-126P
6F20	2AB4	2	address of the last read byte when executing a basic program
	2ABD	2	pointer DATA-1 for RESTORE
	2E7C	1	basic configured for logical address (0..65535)
	2E80	2	poniter stack-1 for bank+return address when calling ext.ROM from int.ROM
	2E82	??	stack for bank+return address when calling ext.ROM from int.ROM
783C	303C	1	staus display
			bit 0: shift
			bit 1: def
			bit 2: printer (not on PC-1350/PC-1360)
			bit 3: reserve mode
			bit 4: run mode
			bit 5: program mode
			bit 6: japan mode
			bit 7: sml
787C	307C	1	mode of angular measurements
			bit 0: DEGREE
			bit 1: RADIAN
			bit 2: GRAD
			bit 3:
			bit 4:
			bit 5:
			bit 6:
			bit 7:
6F63	30A8	2	line: start X
6F65	30AA	2	line: start Y
6F67	30AC	2	line: end X
6F69	30AE	2	line: end Y
	3400	1	current ROM bank
	3800	1	strobe
	3A00	1	bit 0: IO1 (out)
			bit 1: IO2 (out)
			bit 2: Dout (out)
			bit 3: Din (out)
			bit 4: ACK (out)
			bit 5: data transmit ready (RS232)
			bit 6: ready to receive (RS232)
			bit 7: request to send
	3E00	1	bit 0: keyboard
			bit 1: keyboard
			bit 2: keyboard
			bit 3: export bridge
6C30	F9D0	8	Z ; Z$ ; A(26) ; A$(26)
6C38	F9D8	8	Y ; Y$ ; A(25) ; A$(25)
6C40	F9E0	8	X ; X$ ; A(24) ; A$(24)
6C48	F9E8	8	W ; W$ ; A(23) ; A$(23)
6C50	F9F0	8	V ; V$ ; A(22) ; A$(22)
6C58	F9F8	8	U ; U$ ; A(21) ; A$(21)
6C60	FA00	8	T ; T$ ; A(20) ; A$(20)
6C68	FA08	8	S ; S$ ; A(19) ; A$(19)
6C70	FA10	8	R ; R$ ; A(18) ; A$(18)
6C78	FA18	8	Q ; Q$ ; A(17) ; A$(17)
6C80	FA20	8	P ; P$ ; A(16) ; A$(16)
6C88	FA28	8	O ; O$ ; A(15) ; A$(15)
6C90	FA30	8	N ; N$ ; A(14) ; A$(14)
6C98	FA38	8	M ; M$ ; A(13) ; A$(13)
6CA0	FA40	8	L ; L$ ; A(12) ; A$(12)
6CA8	FA48	8	K ; K$ ; A(11) ; A$(11)
6CB0	FA50	8	J ; J$ ; A(10) ; A$(10)
6CB8	FA58	8	I ; I$ ; A(09) ; A$(09)
6CC0	FA60	8	H ; H$ ; A(08) ; A$(08)
6CC8	FA68	8	G ; G$ ; A(07) ; A$(07)
6CD0	FA70	8	F ; F$ ; A(06) ; A$(06)
6CD8	FA78	8	E ; E$ ; A(05) ; A$(05)
6CE0	FA80	8	D ; D$ ; A(04) ; A$(04)
6CE8	FA88	8	C ; C$ ; A(03) ; A$(03)
6CF0	FA90	8	B ; B$ ; A(02) ; A$(02)
6CF8	FA98	8	A ; A$ ; A(01) ; A$(01)
	FAA0	96	output buffer for CE-126P
6D60	FB00	160	output buffer (tokens) / SIO-buffer
6DE0	FB90	32	buffer for string operations with OPEN$
7680	FC00	64	operand stack
	FC20	32	buffer for conversion text to tokens (input mode)
	FC40	32	operator stack
6E60	FC60	80	stringbuffer
	FCB0	32	buttef for generation OPEN$
6F24	FCB4	2	last char+1 in input-buffer (during manual input)
	FD04	1	cursor address in input-buffer
	FD07	1	max count of chars per line: 24 (jap: 18)
	FD08	1	max count of lines: 4 (jap: 2)
7881	FD09	1	CURSOR X (0..23) for PRINT
7880	FD0A	1	CURSOR Y (0..3) for PRINT
6F62	FD0F	1	drawing mode for LINE/PSET/PRESET
			bit 0: ,S
			bit 1: ,R
			bit 2: ,X
			bit 3: ,B
			bit 4: ,BF
			pattern
			bit 6:
			bit 7:
	FD10	1	actual cursor-position X
	FD11	1	actual cursor-position X
7885	FD13	1	buffer for line number index (0..3) for output
6F2A	FD16	1	last char-1 in input-buffer
6EB0	FD20	80	input-buffer
6D00	FD80	96	displaybuffer
7298	FDE0	8	last RND 0 value (different BCD format within exponent
	FDE8	8	buffer for FAC 1 for ROM routines
	FDF0	8	buffer for FAC 2 for ROM routines
6F2B	FE00	1	next free entry in FOR-NEXT stack
6F2C	FE01	1	next free entty in GOSUB stack
6F2E		1	function stack pointer
6F30		1	functiob operater number
6F38		1	input buffer cursor
6E06	FE02	2	for loop 1: pointer to loop variable-1 (LO/HI)
6E08	FE04	7	for loop 1: end value (BCD)
6E0F	FE0B	7	for loop 1: step value (BCD)
6E16	FE12	2	for loop 1: pointer callback (LO/HI)
6E18	FE14	2	for loop 2: pointer to loop variable-1 (LO/HI)
6E1A	FE16	7	for loop 2: end value (BCD)
6E21	FE1D	7	for loop 2: step value (BCD)
6E28	FE24	2	for loop 2: pointer callback (LO/HI)
6E2A	FE26	2	for loop 3: pointer to loop variable-1 (LO/HI)
6E2C	FE28	7	for loop 3: end value (BCD)
6E33	FE2F	7	for loop 3: step value (BCD)
6E3A	FE36	2	for loop 3: pointer callback (LO/HI)
6E3C	FE38	2	for loop 4: pointer to loop variable-1 (LO/HI)
6E3E	FE3A	7	for loop 4: end value (BCD)
6E45	FE41	7	for loop 4: step value (BCD)
6E4C	FE48	2	for loop 4: pointer callback (LO/HI)
6E4E	FE4A	2	for loop 5: pointer to loop variable-1 (LO/HI)
6E50	FE4C	7	for loop 5: end value (BCD)
6E57	FE53	7	for loop 5: step value (BCD)
6E5E	FE5A	2	for loop 5: pointer callback (LO/HI)
7090	FE5C	2	GOSUB: callback-1 for 1st sub routine
7092	FE5E	2	GOSUB: callback-1 for 2nd sub routine
7094	FE60	2	GOSUB: callback-1 for 3rd sub routine
7096	FE62	2	GOSUB: callback-1 for 4th sub routine
7098	FE64	2	GOSUB: callback-1 for 5th sub routine
709A	FE66	2	GOSUB: callback-1 for 6th sub routine
709C	FE68	2	GOSUB: callback-1 for 7th sub routine
709E	FE6A	2	GOSUB: callback-1 for 8th sub routine
70A0	FE6C	2	GOSUB: callback-1 for 9th sub routine
70A2	FE6E	2	GOSUB: callback-1 for 10th sub routine
70A8		8	last result of a arithmetric or logicel function
6F3F	FE71	1	buffer for stack pointer (SP) during basic command execution
	FE77	1	pointer operator stack (&FC40)
6F2D	FE78	1	pointer opernad stack (&FC00)
6F2F	FE79	1	pointer stringbuffer (&FC60)
	FE7A	1	pointer ???-stack (&FC50)
6F39	FEE0	1	USING: flags
			bit 0:
			bit 1:
			bit 2:
			from of exponent
			bit 4:
			bit 5:
			bit 6:
			bit 7:
6F3A	FEE1	1	USING: number of INT digits
6F3B	FEE2	1	USING: string
6F3C	FEE3	1	USING: position of decimal separator
6F40	FEE8	2	GCURSOR X (-32768 - 32767)
6F42	FEEA	2	GCURSOR Y (-32768 - 32767)
6F5C	FEEC	2	end X of last LINE
6F5E	FEEE	2	end Y of last LINE
	FEF0	2	start of currently edited basic program
	FEF2	2	address of the last edited basic line
7498		2	cursor polition in basic RAM for editor
749A	FEF4	2	pointer next command-1 for CONT
749C	FEF6	2	address in basic program with error
	FF00	2	address of blinking cursor in display memory
	FF02	1	char under the binking cursor
6F59	FF0D	1	constant &79 (JMP)
6F5A	FF0E	2	address to call from ROM
7280	FF10	24	buffer to convert REAL -> ASCII
6F55	FF2E	2	pointer RSM memory
78B0	FF30	1	SIO flags
			bit 0:
			bit 1:
			bit 2:
			bit 3:
			bit 4:
			bit 5:
			transfer finished
			bit 7: SIO is OPEN
78B1	FF31	1	SIO: textendcode
78B2	FF32	1	SIO:falgs baud-rate
			bit 0: 300 Baud
			bit 1: 600 Baud
			bit 2: 1200 Baud
			bit 3:
			bit 4:
			bit 5:
			bit 6: Transmitting EOL
			bit 7: Transmitting EOT
78B3	FF33	1	SIO: SIO-Parameter
			bit 0: LF
			bit 1: CR + LF
			bit 2: CR
			transmitting a basic program
			bit 4: Stop-Bits: 0=1 Bit, 1=2 Bit
			bit 5: Paraity (in combination with Bit 6)
			bit 6: Parity: 00=None, 01=Odd, 11=Even
			Number ob bits: 0=7 bit, 1=8 bit
	FF34	1	SIO: console length
6F6F	FF3F	144	RSV memory
6FFF	FFCF	1	mask &FF to detect end of RSV memory
	FFD0	6	&20..&25 start parameter block
6F00	FFD6	1	flag for memory
6F01	FFD7	2	start basic program
6F03	FFD9	2	end basic program
6F05	FFDB	2	start last MERGE block
6F07	FFDD	2	start variables
6F09	FFDF	8	password as string (first char is &F5)
6F12	FFE8	1	Flags:
			bit 0:
			bit 1:
			bit 2:
			bit 3: PRINT = LPRINT
			bit 4:
			bit 5:
			bit 6:
			bit 7:
6F13	FFE9	1	Flags:
			bit 0:
			bit 1:
			WAIT without value
			bit 3:
			bit 4:
			bit 5:
			bit 6:
			bit 7:
	FFEA	1	Flags for input
			bit 0:
			ERROR mode (only cursor keys and CE/CLS)
			bit 2:
			program line input mode
			line with error was shown
			bit 5: PASS on
			bit 6:
			bit 7:
6F14		1	Flags:
			bit 0:
			bit 1:
			bit 2:
			bit 3:
			bit 4:
			bit 5: PASS on
			bit 6:
			bit 7:
6F15		1	Flags for keyboard
			bit 0: All keys available
			ERROR mode (only cursor keys and CE/CLS)
			program stopped with WAIT
			RSV editing mode
			bit 4:
			program line input mode
			bit 6:
			bit 7:
6F16	FFEC	1	Flags
			bit 0:
			bit 1:
			bit 2:
			bit 3:
			bit 4:
			bit 5:
			TEXT mode active
			Japen mode active
6F17		1	Flags
			bit 0:
			bit 1:
			no line feed for PRINT
			bit 3:
			bit 4:
			bit 5:
			bit 6:
			bit 7:
	FFF0	2	RAM start +&30 (for 32K &8030)
	FFF2	2	start of standard variables
	FFF6	2	logical address start of basic memory
	FFF8	2	logical address end of basic memory

Internal ROM

Introduction
These are the procedures from the internal ROM in the PC-1360
Afaik the addresses are identicle for ROM version 3 and 5.
PC-1350: The internal ROM for ROM version 0 und 1 are identicle.

Internal ROM &0000 - &1FFF

address
PC-1350 address
PC-1360 description

0436 00B5 keyboard input (PC-1360: identicle to 1E9C); see 46C0 ROM-bank 0

804E 0594 FAC 1 = FAC 2 ^ FAC 1; (*01)(*01b)

11B0 088A FAC 1 = (18/19); range 0 to 65535 (*01)(*01a)

11B7 0891 FAC 1 = (18/19); range -32768 to 32767 (*01)(*01a)

162B 090E (18) = FAC 1; range 0 to 255 (*01)(*01a)

162F 0912 (18/19) = FAC 1; range -32768 to 32767 (*01)(*01a)

163A 091D (18/19) = FAC 1; range 0 to 65535 (*01)(*01a)

01AD 0A74 FAC 1 = FAC 2 incl. sign in (31) (*01)(*01a)

01B6 0A7D FAC 1 = FAC 2 (*01)(*01b)

01D5 0A82 FAC 1 = FAC 3 incl. sign in (31) (*01)(*01a)

01DE 0A8B FAC 1 = FAC 3 (*01)(*01b)

01BB 0A90 FAC 1 = FAC 4 incl. sign in (31) (*01)(*01a)

01C4 0A99 FAC 1 = FAC 4 (*01)(*01b)

01C9 0AA0 FAC 2 = FAC 1 incl. sign in (31) (*01)(*01a)

01D2 0AA9 FAC 2 = FAC 1 (*01)(*01b)

019F 0AAE FAC 2 = FAC 4 incl. sign in (31) (*01)(*01a)

01A8 0AB7 FAC 2 = FAC 4 (*01)(*01b)

01E6 0ABA FAC 3 = FAC 1 incl. sign in (31) (*01)(*01a)

01EF 0AC3 FAC 3 = FAC 1 (*01)(*01b)

01F2 0AC6 FAC 4 = FAC 1 incl. sign in (31) (*01)(*01a)

01FB 0ACF FAC 4 = FAC 1 (*01)(*01b)

0193 0AD2 FAC 4 = FAC 2 incl. sign in (31) (*01)(*01a)

019C 0ADB FAC 4 = FAC 2 (*01)(*01b)

01E3 0ADE FAC 3 = FAC 2 (*01)(*01b)

0202 0B8A FAC 1 <-> FAC 2 incl. sign in (31) (*01)(*01a)

020F 0B97 FAC 1 <-> FAC 2 (*01)(*01b)

013F 0BDB FAC 1 = 0; (31) incl. sign in (31) (*01)(*01a)

0142 0BDE FAC 1 = 0 (*01)(*01b)

0133 0BE5 FAC 2 = 0; (31) incl. sign in (31) (*01)(*01a)

0139 0BEB FAC 3 = 0; (31) incl. sign in (31) (*01)(*01a)

0166 0BF1 Mantissa from FAC 1 = 0; sign and exp. are not changed (*01)

0160 0BFB Mantissa from FAC 2 = 0; sign and exp. are not changed (*01)

0163 0BFE Mantissa from FAC 4 = 0; sign and exp. are not changed (*01)

017D 0C01 sign and exp. from FAC 1 = 0 (*01)(*01b)

017A 0C08 sign and exp. from FAC 2 = 0 (*01)(*01b)

0153 0C0B FAC 2 = 1 incl. sign in (31) (*01)(*01a)

06B9 0C18 FAC 2 = 0.6 incl. sign in (31) (*01)(*01a)

0732 0C24 constants for type of angle conversion:

DEG: FAC 2 = 0.434294481903 incl. sign in (31) (*01)(*01a)

GRAD: FAC 2 = 0.9 incl. sign in (31) (*01)(*01a)

RAD: FAC 2 = 57.2957795131 incl. sign in (31) (*01)(*01a)

0BEC 0C54 FAC 2 = PI = 3.141592653 incl. sign in (31) (*01)(*01a)

0301 0D42 (31)=sign FAC 1 and FAC 2; (FE71)=SP+2 (PC-1350: (6F3F)=SP+2); (30)=00 (*01)(*01b)

0310 0D64 (31)=sign FAC 1; (FE71)=SP+2 (PC-1350: (6F3F)=SP+2); (30)=00 (*01)(*01b)

0328 0D69 sign from (31) -> FAC 1 and FAC 2 (*01)(*01b)

0333 0D74 sign from (31) -> FAC 1 (*01)(*01b)

10E4 10B9 ERROR 2

10EC 10C0 ERROR 1

10F0 10C8 ERROR 3

10F4 10CD ERROR 4

10F8 10D2 ERROR 5

10FC 10D7 ERROR 6

10E6 10BB ERROR A (1 <= A <= 9)

1100 10DC ERROR 7

1104 10E1 ERROR 8

1108 10E6 ERROR 9

027D 1108 D = AE

0282 110D S = AE

0287 1112 S = AE+1

028D 1118 D = AE+1

0297 111E S = AE-1

02B5 1124 D = AE-1

1414 112A D = S

1419 112F S = D

1553 1134 (0C/0D) = S

1558 1139 (0C/0D) = D

113E D <-> (0C/0D)

161A 1143 S <-> (0C/0D)

170E 1148 A = (0A); (0A) = (06)

1713 114D (0B) = (06); A = (06)

115C 1153 push S

1167 115E pop S

141E 1188 (38/39) = S

140B 1192 S = (38/39)

108E 1197 S <-> (38/39)

119C S <-> D

11A6 11A1 S = (1D/1E)-1 == STR 2 (*01)

11AA 11A5 S = (15/16)-1 == STR 1 (*01)

98B0 11AB AE = (FFDB/DC) (PC:1350: 6F05/06) start of last MERGE-block

98B6 11B1 AE = (FFD9/DA) (PC:1350: 6F03/04) end of basic memory

0293 11B7 S = FD1F (PC-1350: 6EAF) Inputbuffer (ASCII or token)

029D 11C1 S = FBFF (PC-1350: 767F) operand-stack

02A3 11C7 S = FD7F (PC-1350: 6CFF) displaybuffer

02AA 11CE D = FD7F (PC-1350: 6CFF) displaybuffer

02B1 11D5 D = FD1F (PC-1350: 6EAF) inputbuffer

02BB 11DF D = FBFF (PC-1350: 767F) operand-stack

11E5 S = (FEF0/F1) start basic programm

1471 11EB S = (FFD7/D8) (PC-1350: 6F01/02) start basic memory

11F1 (FFDB/DC) = (FFD7/D8) using AE

11FC (FEF0/F1) = (FFDB/DC) using AE

1207 (FEF0/F1) = (FFD7/D8) using (0A/0B)

1D84 1212 (2AB4/B5) = S (PC-1350: (6F20/21) = S); save S for analyse basic program (*03)

1D89 1217 S = (2AB4/B5) (PC-1350: S = (6F20/21)); S = restore address at end of basic-command (*03)

1175 1233 E mal (+D) = (+S)

1265 FDE8..EF = 00 temp memory for FAC 1 (*01)

126E FAC 4 = FAC 1 (*01)(*01b)

1275 FAC 1 = FAC 4 (*01)(*01b)

127C FAC 2 = FAC 1 (*01)(*01b)

12DB A = (+S) from both RAM bank (*02)

12FC A = (-S) from both RAM bank (*02)

131B (+D) = A to both RAM bank (*02)

133C (-D) = A to both RAM bank (*02)

13A3 (5E) AND FB; PC AND FB; activate RAM bank 0

13A9 (5E) OR 04; PC OR 04; activate RAM bank 1

13AF wait A * 2 ms

09E8 13B7 wait 6 ms

04AD 13C4 CR = 00; display off

04B1 13C8 CR = 01; display on

1441 FAC 1 = 00; FAC 2 = 00; FAC 3 = 00 (*01)(*01b)

1C44 1448 FD80..AF = 20 (PC-1350: 6D00..6D2F); clear 1.+2. line of displaybuffer

1C3F 144D FD98..AF = 20 (PC-1350: 6D18..6D2F); clear 2nd line of displaybuffer

1C36 1452 FD80..97 = 20 (PC-1350: 6D00..6D17); clear 1st line of displaybuffer

1D3B 1483 (10)..(27) <-> FDC8..DF (PC-1350: 6D48..5F); 4th line .Zeileof displaybuffer

1D43 148B (10)..(27) <-> FD80..97 (PC-1350: 6D00..17); 1st line of displaybuffer

1D48 1490 (10)..(27) <-> FD98..AF (PC-1350: 6D18..2F); 2nd line of displaybuffer

1D4D 1495 (10)..(27) <-> FDB0..C7 (PC-1350: 6D30..47); 3rd line of displaybuffer

1E0C 14B6 FD80..DF = 20 (PC-1350: 6D00..5F); clear displaybuffer (24x4)

14BF FD80..A3 = 20 (PC-1350: 6D00..23); clear displaybuffer (18x2)

1C1C 14C8 FD20..6F = 0D (PC-1350: 6EB0..FF); clear input-buffer

1517 BIT(FF30),80; SIO open

15C5 2A98..AF = 00; printer-buffer CE-126P

1CD0 16B5 D = address display memory -1 for line A 2800/2840/281E/285E (PC-1350: 7000/7040/701E/705E)

1CEF 16D4 D = address display memory-1 for cursor X=(FD10)/Y=(FD11) (PC-1350: X=7881/Y=7880)

1D5A 1710 D = address displaybuffer according line for cursor Y=(FD11) (PC-1350: 7880)

1D70 1726 D = FD80 (PC-1350: 6D00); 1st line displaybuffer

1D74 1731 D = FD98 (PC-1350: 6D18); 2nd line displaybuffer

1735 D = FD92; 2nd line displaybuffer (18x2)

1D78 1739 D = FDB0 (PC-1350: 6D30); 3rd line displaybuffer

1D7C 173D D = FDC8 (PC-1350: 6D48); 4th line displaybuffer

15EC 17C4 FEE0..E3 = 00 (PC-1350: 6F39..3C); clear USING-format

1410 18A3 CMP (14),D0; test FAC 1 for string

D986 18AD A = '<' or '>', depending on bit 6 from (&FFEC; PC-1350: &6F16); TEXT-mode

10C1 18D9 FAC 1 = (POP value operand-stack (&FC00; PC-1350: &7680)) (*01)(*01b)

10AA 18DD FAC 2 = (POP value operand-stack (&FC00; PC-1350: &7680)) (*01)(*01b)

1737 19B0 (+D) = 2D; -""

19F7 (P) = 0; (P+1) = 0

1DF3 1A18 display line, A=0..3, A=4->line 0..3, see ROM bank 1, 4004

805A 1E80 FAC 1 = FAC 2 + FAC 1 (*01), PC-1360:(*01a), PC-1350:(*01b)

8057 1E84 FAC 1 = FAC 2 - FAC 1 (*01), PC-1360:(*01a), PC-1350:(*01b)

8060 1E88 FAC 1 = FAC 2 * FAC 1 (*01), PC-1360:(*01a), PC-1350:(*01b)

8066 1E8C FAC 1 = FAC 2 / FAC 1 (*01), PC-1360:(*01a), PC-1350:(*01b)

04B1 1E94 enable display == JP,13C8

04AD 1E98 disable display == JP,13C4

0436 1E9C keyboard input (PC-1360: identicle to 1E9C); see 46C0 ROM-bank 0

89AC 1EC0 FAC 1 = EXP(FAC 1) (*01)(*01a)

89BA 1EC4 FAC 1 = SIN(FAC 1) (*01)(*01a)

89C1 1EC8 FAC 1 = COS(FAC 1) (*01)(*01a)

89C8 1ECC FAC 1 = TAN(FAC 1) (*01)(*01a)

89CF 1ED0 FAC 1 = ASN(FAC 1) (*01)(*01a)

89D6 1ED4 FAC 1 = ACS(FAC 1) (*01)(*01a)

89DD 1ED8 FAC 1 = ATN(FAC 1) (*01)(*01a)

89EB 1EDC FAC 1 = DEG(FAC 1) (*01)(*01a)

89F2 1EE0 FAC 1 = DMS(FAC 1) (*01)(*01a)

8E9F 1EE4 FAC 1 = ABS(FAC 1) (*01)(*01a)

8E7B 1EE8 FAC 1 = INT(FAC 1) (*01)(*01a)

8A00 1EEC FAC 1 = SGN(FAC 1) (*01)(*01a)

89F9 1EF0 FAC 1 = RND(FAC 1) (*01)(*01a)

89B3 1EF4 FAC 1 = SQR(FAC 1) (*01)(*01a)

89A5 1EF8 FAC 1 = LOG(FAC 1) (*01)(*01a)

899D 1EFC FAC 1 = LN(FAC 1) (*01)(*01a)

8B1E 1F00 FAC 1 = ASC(STR 1) (*01)(*01a)

8B3E 1F04 STR 1 = CHR$(FAC 1) (*01)(*01a)

8BA6 1F08 STR 1 = STR$(FAC 1) (*01)(*01a)

8C02 1F0C FAC 1 = VAL(STR 1) (*01)(*01a)

142B activate RAM bank 1

1438 activate RAM bank 0

144D (+S) from RAM bank 0 (S < &8000) or bank 1 (S >= &8000)

1454 if S >= &8000 then activate RAM bank 1

153B X = 783C (status display)

(*01)

The following internal variables/addresses are used:




 
 

variable address number sign
FAC 1 10..17 (31) bit0 = &01 if mantissa is negative
FAC 2 18..1F (31) bit1 = &02 if mantissa is negative
FAC 3 20..27 (31) bit2 = &04 if mantissa is negative
FAC 4 28..2F (31) bit3 = &08 if mantissa is negative
STR 1 14 = D0 
15 = address LO 
16 = address HI 
17 = length 
STR 2 1C..1F

FAC 1..4 are in BCD format like it's used for numeric variables
(31) und collon 'number sign': see also (*01a) and (*01b)
Each function meight destroy FAC 1..4 (STR 1..2) during operation. They meight be used for internal calculations.
(The flags (33) and (37) that are used within rou rountes donÃ¤t have to be set when calling a ROM function. They only are used for internal purpose als temporary flags during calculation).

Some exsamples:




 

number floating point format (BCD)
6 00 00 60 00 00 00 00 00
60 00 10 60 00 00 00 00 00
0.6 99 90 60 00 00 00 00 00
0.06 99 80 60 00 00 00 00 00
-0.6 99 98 60 00 00 00 00 00
-6 00 08 60 00 00 00 00 00

nibble 0-2 stands for the exponent:
For positive number: 0 0 0 to 0 9 9 -> number = mantissa*10^0 to 10^99
For negative number: 9 9 9 to 9 0 1 -> number = mantissa*10^-(1000-999) to 10^-(1000-901) (== 10^-1 to 10^-99)

nibble 3-15 are the mantissa:
For positive number: nibble 3 == 0
For negative numbers: Nibble 3 == 8
nibble 4-15 is the mantissa (for leading zeros then exponent is used).
nibble 14-15 only is used internally for rounding purpose but is not displayed.

(*01a) The sign of FAC 1..4 must not be set in (31) before calling the function.
Functions marked with (*1a) set (31) internally if needed and also copy it back from (31) to FAC 1..4 after calculation.

(*01b) The sign for FAC 1..4 must be copyed to (31) and should be deleted in FAC 1..4 before calling the function.
This can be done by calling 0D64/0D42 (PC-1360) or 0310/0301 (PC-1350)
(31) indicates the sign of FAC 1..4 after calling the function and should be written to FAC 1..4
This can be done by calling 0D74/0D69 (PC-1360) or 0333/0328 (PC-1350).

Functions not marked with (*01b) don't set (31) from FAC 1..4 but rely on it for calculation.

(*02)

If the logical basic memory starts at < &8000 (MEM "B" or MEM "D"):

address &0000 to &7FFF:
- activate RAM bank 0
- read/write (address + &8000)
- activate RAM bank 1
address &8000 to &FFFF:
- (address) read/write from/to RAM bank 1

Sonst (MEM "C"):

(address) read/write from/to RAM bank 0

(*03) PC-1360: 2AB4/B5 , PC-1350: 6F20/21
S is stored at this address after all parameters of a basic command were analysed.
The basic interpreter will continue execution at (S+1).

Example:
The assembler program expects, separated by a comma, a numeric parameter:

Example PC-1360 (address: 8100) 100: CALL &8100,G LD A,(+S) CMP A,2C JP Z,+0C ; comma found ; Error 1 (no comma found) POP A ; delete return address auf basic command CALL POP A DEC S ; set S to the last read char JSR 1212 ; 2AB4/B5 = S SET C ; C=1 as flag for an error JP,10C0 ; end program with ERROR 1 JSR,4016 ; FAC1 = argument starting at (S+1), ROM-bank 0 (in the example value of variable G) JSR 1212 ; 2AB4/B5 = S .... ; use FAC1 RET ; end basic extension (== CALL command)

Example PC-1350 (address: 6100) 100: CALL &6100,G LD A,(+S) CMP A,2C JP Z,+0C ; comma found ; Error 1 (no comma found) POP A ; delete return address auf basic command CALL POP A DEC S ; set S to the last read char JSR 1D84 ; 6F20/21 = S SET C ; C=1 as flag for an error JP,10EC ; end program with ERROR 1 JSR,8039 ; FAC1 = argument starting at (S+1) (in the example value of variable G) JSR 1D84 ; 6F20/21 = S .... ; use FAC1 RET ; end basic extension (== CALL command)

ROM bank 0

Introduction
These are the procedures from the ROM (bank 0) in the PC-1360
Afaik the addresses are identicle for ROM version 3 and 5.
PC-1350: The addresses for ROM version 0 and 1 are different.

ROM bank 0

address
PC-1350 address
PC-1360 description

8039
v0 & v1 4016 Read value from S+1, result -> FAC 1
S points to the next char

420F NEW
Can only be executed in "Program Mode"

8403
v0 & v1

46C0

PC-1360:
Return values:

Table to convert keycode from 1E9C/00B5 to ASCII


46C0..4707 key without SHIFT and without SML

4708..474F key with SHIFT and without SML

4750..4797 key without SHIFT and with SML

4798..47DF key with SHIFT and with SML

PC-1350:
Return values:

Table to convert keycode from 0436 to ASCII


8403..8443 key without SHIFT and without SML

8485..84C5 key with SHIFT and without SML

8507..8547 key without SHIFT and with SML

8548..8588 key with SHIFT and with SML

1A54

6DEF

Search variable address from (S+1)
The variable already must be defined!
Return value:

06/07	adress-1 of the variable
0A/0B	variable name

For standardvariables:

number:	0A	name
	0B	00
	(+D)	1. byte of the number
string:	0A	name
	0B	20
	(+D)	F5 (indicator for string)

Bei normalen Variablen:

Zahl:	0A	1.Zeichen
	0B	2.Zeichen
	(+D)	1. Byte der Zahl
String:	0A	1.Zeichen
	0B	2.Zeichen+80
	(+D)	1.Zeichen des Strings
		Stringsende = 00

8A85 v0
8BDB v1 6A3A FAC 1 = FAC 2 < FAC 1 (*01)(*01a)

8A34 v0
8B8A v1 6A45 FAC 1 = STR 2 < STR 1 (*01)

8AB5 v0
8C0B v1 6A4F FAC 1 = FAC 2 > FAC 1 (*01)(*01a)

8A36 v0
8B8C v1 6A58 FAC 1 = STR 2 > STR 1 (*01)

8A1F v0
8B75 v1 6A62 FAC 1 = FAC 2 <= FAC 1 (*01)(*01a)

8A18 v0
8B6E v1 6A6B FAC 1 = STR 2 <= STR 1 (*01)

8A2C v0
8B82 v1 6A75 FAC 1 = FAC 2 >= FAC 1 (*01)(*01a)

8A1A v0
8B70 v1 6A80 FAC 1 = STR 2 >= STR 1 (*01)

8AFB v0
8C51 v1 6A8A FAC 1 = FAC 2 == FAC 1 (*01)(*01a)

8ABD v0
8C13 v1 6A98 FAC 1 = STR 2 == STR 1 (*01)

8B0F v0
8C65 v1 6AA6 FAC 1 = FAC 2 <> FAC 1 (*01)(*01a)

8B0A v0
8C60 v1 6AAF FAC 1 = STR 2 <> STR 1 (*01)

6E85

Search address of a 2 char variable
Input parameter:

0A	1. character of the variable name
0B	2. character of the variable name

Return value:

D	address
A	length

ROM bank 1

Introduction
These are the procedures from the ROM (bank 1) in the PC-1360
Afaik the addresses are identicle for ROM version 3 and 5.
PC-1350: The addresses for ROM version 0 and 1 are different.

ROM bank 1

address
PC-1350

address
PC-1360

description

807E
v0 & v1

4004

Output one line/all lines on the display
Input parameter:

PC-1350

PC-1360

value

6D00..6D17

FD80..FD97

text for 1st line

6D18..6D2F

FD9A..FDAF

text for 2nd line

6D30..6D47

FDB0..FDC7

text for 3rd line

6D48..6D5F

FDC8..FDDF

text for 4th line

0..3	output line 1..4
4	output all 4 lines

DEAD v0
E23C v1

4043

Scroll display
Scrolls the display and the displaybuffer (FD80..FDDF) (PC-1350: 6D00..6D5F) one line up
Input parameter:
A=4

808A
v0 & v1

418B

Charset 5x8
Character beginning with ASCII 32
PC-1360: each character is stored in display order (byte 0..4)
PC-1350: each character is stored in inverse display order (byte 4..0)

4513

Charset 8x16 (upper 8 + lower 8)

E549 v0
E983 v1

615E

Output one character on display
Input parameter:

PC-1350	PC-1360	value
A	A	character
7881	FD10	cursor X (0..23)
7880	FD11	cursor Y (0..3)

ROM bank 2

Introduction
These are the procedures from the ROM (bank 2) in the PC-1360
Afaik the addresses are identicle for ROM version 3 and 5.
PC-1350: The addresses for ROM version 0 and 1 are different.

ROM bank 2

address
PC-1350

address
PC-1360

description

4064

NEW (only when "program mode" is active (=420F bank 0)

40C4

variable -> FAC 1 (=4016 bank 0)

E6B1 v0
EAEB v1

5224

LINE
Input parameter:

PC-1350

PC-1360

value

6F63/64

30A8/A9

start X

6F65/66

30AA/AB

start Y

6F67/68

30AC/AD

end X

6F69/6A

30AE/AF

end Y

6F62

FD0F

or 01	,S
or 02	,R
or 04	,X
or 08	,B
or 10	,BF
or 20	pattern

74A0/A1

FF10/11

pattern

EB3A v0
EF84 v1

5703

PSET / PRESET / PSET,X
Input parameter:

PC-1350

PC-1360

value

20/21

X (LO/HI)

22/23

Y (LO/HI)

6F62

FD0F

00	POINT (Z=0 when pixel set)
01	PSET
02	PRESET
04	PSET,X

EB4E v0
EF98 v1

5717

PSET / PRESET / PSET,X
Input parameter:

PC-1350	PC-1360	value
	20	X with 0 <= X <= 149(decimal)
	22	Y with 0 <= Y <= 31(decimal)
6F62	FD0F	see 5703

5ECB

search line number in 18/19
Input parameter:

18/19

line number (LO/HI)

Return value:

result:
carry=0

Carry=0	line number found
3A/3B	adsresse (LO/HI)
3C/3D	line number (LO/HI)

result:
carry=1

Carry=1	line number not found
3C/3D=0	complete program was searched without success
3C/3D<>0	line number found larger than the line number to find

ROM bank 4

Introduction
These are the procedures from the ROM (bank 4) in the PC-1360
Afaik the addresses are identicle for ROM version 3 and 5.
PC-1350: The addresses for ROM version 0 and 1 are different.

ROM bank 4

address PC-1350	address PC-1360	description
99CA v0 9B5E v1	5E72	CLOAD M at address in 28/29 Input parameter: 28/29 = address, where the program is loaded to
99CD v0 9B61 v1	5E75	CLOAD M to original address Input parameter: (31) AND &7F ; bit 7 must be deleted

back to staring page Sharp

Copyright: All images and text shown on this page are ©1999/2026 Bernhard Schwall, copyright protected and meight not be used without permission of the author.
Author: Bernhard Schwall	last change: 01.01.2026