TAPE format

[ From monitor handling manual excerpt ]

* Power form

Recording type

1 corrugated FSK [ '0' -> F, '1' -> 2f ]

Transfer speed

1600bps - 3200bps [ option ]

Ripple mark

Example) when of 1600bps

'0'

F = 1200Hz 2t = 833 mu sec

'1'

2f = 2400Hz T = 417 mu sec

* File Format

ID format

 

0	File Attribute
1	File Name (9byte)
2
3
4
5
6
7
8
9
10	Loading first address (L)
11	Loading first address (H)
12	Data Size (L)
13	Data Size (H)
14	PROGRAM START Address (L)
15	PROGRAM START Address (H)
16	Extend Attribute
17	Blank Area (14byte)
18
19
20
21
22
23
24
25
26
27
28
29
30

 

File Attribute

	0	1
0	Data	Executable (Machine Language)
1	Loading Only	AUTO START
2	Continual data	Data File
3	CPU Memory	VDP Memory
4	Extended attribute it is	Extended attribute to be
5	Language Type (2)
6	Language Type (2)
7	Language Type (2)

Language Type

• 0...
• 1... Basic-I source
• 2... Falc
• 3... Basic-G
• 4... Basic-F
• 5... reserved
• 6... reserved
• 7... reserved

* File Format

 

Free running

Tape Mark

FilecId...

IBG

Data Block

...

IBG

Data Block

IBG

Data Block...

IBG

EOF

FilecId ...

 

Identification Flag

Byte number

File Attribute

File Name

Loading start address

?

CheckSum

Data Block ...

 

Identification Flag

Byte number

DATA

CheckSum

Free running

 

Non sound recording period (4 seconds)

Tape Mark

 

8000 times mark

File ID

 

Above-mentioned File ID

IBG

 

In case of non- continual data in case of 3600 marks and continual data 512 time mark

Identification flag

 

• H (48h)... FilecId
• D (44h)... Data Block
• E (45h)... EOF
• F (46h)... File Block

EOF

 

It is added only when the non- continual data is outputted

* Byte Format

When the data of 1 byte is sent, adding the start bit and the stop bit, you send at 10 bits. (StartBit = 0, StopBit = 1)

EX) A5h... 0101001011 (StartBitc:lsb... MSB:StopBit)

* Baud rate

Baud rate when saving is displayed with formula below.

((D1 + N) ^-1 + 2 (d0 + 2n) ^-1 ) / 3

• D1 = 35.36 X 10 ^-6
• D0 = 49.71 X 10 ^-6
• N = N X 8.929 X 10 ^-6
• N = Loop Counter (value of STDLY on system table)... as for initial value 33

When loading, the leader part (at the point where the mark is continual 256 or more because) with baud rate is calculated, it is not necessary for the user to appoint.

However, there is a limit in the following range of baud rate, theoretically the lower limit is 1170, upper limits approximately 4000. In addition, the lower limit as for 1170, upper limits 2830 was as the experimental value due to the general テレコ.