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Added scaffolding for PC8080 SerialPort

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This commit is contained in:
Jeff Parsons 2016-08-08 15:25:57 -07:00
commit d31bfb0e6e
11 changed files with 1075 additions and 445 deletions
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16
devices/pc8080/rom/vt100/VT100.asm
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@ -212,9 +212,19 @@ X00f5: push d
pop d
jmp X0875
;;
;; Keyboard interrupt handler
;;
;
; Keyboard interrupt handler
;
; The "Keys Flag Byte/Buffer" at 0x2068 contains the following bits:
;
; 0-1 Key counter
; 2 Key counter overflow bit
; 3 Setup
; 4 Control
; 5 Shift
; 6 Caps Lock
; 7 Last Key
;
X00fd: push psw
in 82h ;; Read from keyboard port
push h