| INHEX and INCH, temporary storage locations CKSM and both | |
| accumulators. If a | |
| When BYTE is called as a subroutine, the computer will wait for two hex | |
| characters to be entered thru the control port. If a 3C is entered, the results | |
| will be as follows: |
|
| ACC A | 3C |
| ACC B | CKSM |
| IXR | UNCHANGED |
| CKSM | Prior CKSM + check sum generated inside |
|
| BYTE |
OUTHL (E067) | These subroutines are | used by OUT2HS and OUT4HS to output |
OUTHR (E06B) | hexadecimal numbers |
|
OUTEEE | This is the character output routine used by PDATA1, OUT4HS, OUT2HS | |
OUTCH | and most programs written for SWTBUG/MIKBUG® to output one character | |
OUTEE | from the computer to the control port (I/O # 1). OUTEEE, OUTCH and | |
(E1D1) | OUTEE1 are all functional equivalents- OUTEE1 is the main output routine | |
| with OUTCH and OUTEEE being jumps to OUTEE1. When using this | |
| routine, OUTEEE (E1D1) should be used to maintain compatibility with | |
| MIKBUG® systems. |
|
| To use OUTEEE the character to be output should be placed in the A | |
| accumulator in its ASCII form. To output the letter A on the control terminal, | |
| the following program could be used. | |
| LDA A | #$41 |
| JSR | OUTEEE |
| The processor’s registers are affected as follows. | |
| ACC A | changed internally |
| ACC B | not affected |
| IXR | not affected |
| OUTEEE is an | |
INEEE, | The locations are all functionally equivalent to SWTBUG® ‘s character input | |
INCH, | routine. This routine will look for one character from the control terminal (I/O | |
INEEE1 | # 1) and store it in the A accumulator. Once called, INEEE will loop within it- | |
(E1AC) | self until a character has been input. Anytime input is desire, the call JSR | |
| INEEE should be used. |
|
| INEEE automatically sets the 8th bit to 0 and does not check for parity. | |
| When using INEEE the processor’s registers are affected as follows: | |
| ACC A | loaded with the character input from the terminal |
| ACC B | not affected |
| IXR | not affected |
INCH8 (E1F6) INCH8 is functionally the same as INEEE except that the 8th bit is not set to
8.This subroutine should be used whenever full
INHEX (E0AA) | INHEX is the subroutine used by BYTE and BADDR that will input one | |
| hexadecimal character from the control terminal. If a | |
| entered, SWTBUG® control will resume. If a hex character, such as an E is | |
| entered, the results will be as follows: | |
| ACC A | 0E |
| ACC B | not affected |
| IXR | not affected |
PDATA1 (E07E) | PDATA1 is the subroutine used to output a string of text on the control | |
| terminal. PDATA1 will start outputting data that is pointed to by the index | |
register and will continue until a 04 is seen. For example, if you wanted to print HELLO on the terminal the following could be used.
15
