2 ; Zero page variables for the CBM 610
4 ; Taken from a kernal disassembly done by myself in 1987.
6 ; Ullrich von Bassewitz, 28.09.1998
12 ; Up to $20 and $60-8F used by runtime and fixed values
13 ; -----------------------------------
15 KbdScanBuf = $20 ; Intermediate for keyboard scan
17 RecvHead = $21 ; Head of receive buffer
18 RecvTail = $22 ; Tail of receive buffer
19 RecvFreeCnt = $23 ; Number of bytes in receive buffer
20 SendHead = $24 ; Head of send buffer
21 SendTail = $25 ; Tail of send buffer
22 SendFreeCnt = $26 ; Number of bytes free in send buffer
87 sedt2 = $DA ; Temp, frequently used