Int 4A/AH=05h

TI Professional PC - KEYBOARD - INSERT CHARACTER INTO KEYBOARD BUFFER

AH = 05h
BX = character code (BH=00h if ASCII character, BL=00h/BH nonzero for
extended codes) (see #03214)

Return:
ZF set if keyboard buffer was already full
ZF clear if keystroke inserted into buffer

See Also: AH=00h - AH=02h - AH=03h - AH=04h -

(Table 03214) Values for TI Professional PC scan/character codes: Scan Key Normal Shift Ctrl Alt Notes 00h -- unused 01h F5 3F00h 5800h 6200h 6C00h 02h F6 4000h 5900h 6300h 6D00h 03h F7 4100h 5A00h 6400h 6E00h 04h F8 4200h 5B00h 6500h 6F00h 05h F9 4300h 5C00h 6600h 7000h 06h F10 4400h 5D00h 6700h 7100h 07h F11 4500h 0800h 0A00h 0C00h 08h F12 4600h 0900h 0B00h 0D00h 09h 1 ! 0031h 0021h ---- 7800h 0Ah 2 @ 0032h 0040h 0300h 7900h 0Bh 3 # 0033h 0023h ---- 7A00h 0Ch 4 $ 0034h 0024h ---- 7B00h 0Dh 5 % 0035h 0025h ---- 7C00h 0Eh 6 ^ 0036h 005Eh 001Eh 7D00h 0Fh 7 & 0037h 0026h ---- 7E00h 10h 8 * 0038h 002Ah ---- 7F00h 11h 9 ( 0039h 0028h ---- 8000h 12h 0 ) 0030h 0029h ---- 8100h 13h - _ 002Dh 005Fh 001Fh 8200h 14h = + 003Dh 002Bh ---- 8300h 15h BACK SPACE 0008h 0008h 007Fh ---- 16h ` ~ 0060h 007Eh ---- ---- 17h NUM = 003Dh 003Dh 003Dh 8C00h 18h NUM + 002Bh 002Bh 002Bh 8D00h 19h NUM SPAC 0020h 0020h 0020h 8E00h 1Ah NUM TAB 0009h 0F00h 0009h 8F00h 1Bh NUM 1 0031h 0031h 0031h (alt-###) [Note 5] 1Ch (unused) 1Dh NUM 0 0030h 0030h 0030h (alt-###) [Note 5] 1Eh NUM ENTER 000Dh 000Dh 000Dh ---- 1Fh NUM 4 0034h 0034h 0034h (alt-###) [Note 5] 20h NUM 5 0035h 0035h 0035h (alt-###) [Note 5] 21h NUM 9 0039h 0039h 0039h (alt-###) [Note 5] 22h NUM - 002Dh 002Dh 002Dh ---- 23h NUM 2 0032h 0032h 0032h (alt-###) [Note 5] 24h-26h -- unused 27h NUM 7 0037h 0037h 0037h (alt-###) [Note 5] 28h NUM 8 0038h 0038h 0038h (alt-###) [Note 5] 29h NUM 6 0036h 0036h 0036h (alt-###) [Note 5] 2Ah NUM , 002Ch 002Ch 002Ch ---- 2Bh NUM 3 0033h 0033h 0033h (alt-###) [Note 5] 2Ch NUM . 002Eh 002Eh 002Eh ---- 2Dh PRINT 7200h [Note2] ---- ---- [Notes 1,2] 2Eh RtArrow 4D00h 8A00h 7400h 4E00h 2Fh INS 5200h 2800h 2900h 2A00h [Note 1] 30h DEL 5300h 3800h 3900h 3A00h [Note 1] 31h TAB 0009h 0F00h 0009h ---- 32h Q 0071h 0051h 0011h 1000h 33h W 0077h 0057h 0017h 1100h 34h E 0065h 0045h 0005h 1200h 35h R 0072h 0052h 0012h 1300h 36h T 0074h 0054h 0014h 1400h 37h Y 0079h 0059h 0019h 1500h 38h U 0075h 0055h 0015h 1600h 39h I 0069h 0049h 0009h 1700h 3Ah O 006Fh 004Fh 000Fh 1800h 3Bh P 0070h 0050h 0010h 1900h 3Ch [ { 005Bh 007Bh 001Bh ---- 3Dh ] } 005Dh 007Dh 001Dh ---- 3Eh LINE FEED 000Ah 000Ah 7500h 4F00h 3Fh BRK/PAUS [Note3] [Note4] ---- ---- [Notes 1,3,4] 40h UpArrow 4800h 8800h 8400h 4900h 41h ESC 001Bh 001Bh 001Bh ---- 42h A 0061h 0041h 0001h 1E00h 43h S 0073h 0053h 0013h 1F00h 44h D 0064h 0044h 0004h 2000h 45h F 0066h 0046h 0006h 2100h 46h G 0067h 0047h 0007h 2200h 47h H 0068h 0048h 0008h 2300h 48h J 006Ah 004Ah 000Ah 2400h 49h K 006Bh 004Bh 000Bh 2500h 4Ah L 006Ch 004Ch 000Ch 2600h

4Bh ; :
003Bh 003Ah ---- ---- 4Ch ' " 0027h 0022h ---- ---- 4Dh RETURN 000Dh 000Dh 000Dh ---- 4Eh \ | 005Ch 007Ch 001Ch ---- 4Fh LeftArrow 4B00h 8B00h 7300h 4C00h 50h HOME 4700h 8600h 7700h 8500h 51h Space Bar 0020h 0020h 0020h 0020h 52h Z 007Ah 005Ah 001Ah 2C00h 53h X 0078h 0058h 0018h 2D00h 54h C 0063h 0043h 0003h 2E00h 55h V 0076h 0056h 0016h 2F00h 56h B 0062h 0042h 0002h 3000h 57h N 006Eh 004Eh 000Eh 3100h 58h M 006Dh 004Dh 000Dh 3200h 59h , < 002Ch 003Ch ---- ---- 5Ah PRINT 7200h [Note2] ---- ---- [Notes 1,2] 5Bh . > 002Eh 003Eh ---- ---- 5Ch / ? 002Fh 003Fh ---- ---- 5Dh (unused) 5Eh DEL 5300h 3800h 3900h 3A00h [Note 1] 5Fh INS 5200h 2800h 2900h 2A00h [Note 1] 60h DownArrow 5000h 8900h 7600h 5100h 61h-63h -- unused 64h BRK/PAUS [Note3] [Note4] ---- ---- [Notes 1,3,4] 65h F1 3B00h 5400h 5E00h 6800h 66h F2 3C00h 5500h 5F00h 6900h 67h F3 3D00h 5600h 6000h 6A00h 68h F4 3E00h 5700h 6100h 6B00h 69h-6Fh -- unused

Notes: [1] four of the keys can have differing scan codes, depending on the

actual keyboard; the BIOS accepts either scan code ("normal":
2Fh,

30h, 5Ah, 64h; "alternate":
2Dh,3Fh,5Eh,5Fh) for any of these keys. [2] Shift-Print invokes INT 5E for a screen dump; the PRTSCRN.DEV device driver also supports Alt-Print, Ctrl-Print, Shift-Alt-Print, and Shift-Ctrl-Print for dumping graphics in various permutations. [3] BRK/PAUS invokes INT 5C for a pause, then stuffs 0100h into the keyboard buffer. [4] Shift-BRK/PAUS invokes INT 5D for the Break, then stuffs 0000h into the keyboard buffer; MS-DOS hooks INT 5D to keep the 0000h from appearing in the keyboard buffer. [5] on the TI Pro, one enters an arbitrary character slightly

differently than on a standard PC:
Exactly three numberpad digits must be pressed (using leading zeros for codes less than 100), and the key for the requested code is inserted into the keyboard buffer immediately on pressing the third key. The Alt key may be released and re-pressed arbitrarily often between digits without affecting the Alt-digit-digit-digit sequence.. Scan codes with bit 7 set are not key releases, but rather auto-repeated keystrokes, which the BIOS only places into the keyboard buffer if the buffer is empty at the time (thus avoiding typeahead of repeated keystrokes faster than they can be processed)

See Also: #00006 at INT 09

Category: Vendor-specific BIOS Extensions - Int 4Ah - T

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